%%     Copyright (C) 2020-2022 by Nan Geng <nangeng@nwafu.edu.cn>
%% --------------------------------------------------------------------------
%%
%%     This work may be distributed and/or modified under the
%%     conditions of the LaTeX Project Public License, either
%%     version 1.3c of this license or (at your option) any later
%%     version. This version of this license is in
%%        http://www.latex-project.org/lppl/lppl-1-3c.txt
%%     and the latest version of this license is in
%%        http://www.latex-project.org/lppl.txt
%%     and version 1.3 or later is part of all distributions of
%%     LaTeX version 2005/12/01 or later.
%%
%%     This work has the LPPL maintenance status "maintained".
%%
%%     The Current Maintainer of this work is Nan Geng.
%%
%% --------------------------------------------------------------------------
%%
\NeedsTeXFormat{LaTeX2e}[2020/10/01]
\RequirePackage{expl3}
\ProvidesExplPackage{chinesechess}{2022-05-09}{v1.2.0}
  {Typeset Chinese chess with l3draw}

\RequirePackage { l3keys2e, l3draw, xparse }

% 测量盒子总高度(保证TeXLive的向下兼容)
\cs_if_free:NT \box_ht_plus_dp:N
  {
    \cs_new_protected:Npn \box_ht_plus_dp:N #1
      { \tex_dimexpr:D \box_ht:N #1 + \box_dp:N #1 \scan_stop: }
  }

% 棋盘排版命令用户接口
% #1 星号命令，是否输出棋子
% #2 棋盘类型、棋子类型等外观选项
\NewDocumentCommand{\cchessboard}{ s o }
  {
    \group_begin:
      % 星号命令是否带棋子
      \IfBooleanTF{ #1 }
        {
          \bool_set_false:N  \l__cchess_board_pieces_bool
        }{
          \bool_set_true:N \l__cchess_board_pieces_bool
        }

      \IfNoValueF { #2 }
        {
          % 设置选项
          \keys_set:nn { cchess } { #2 }

          % 有draft参数，需要重构棋子和棋盘
          \tl_if_in:nnT { #2 } { draft }
            {
              % 构建棋盘
              \__cchess_board_construct:
              % 构建红黑各9个棋子
              \__cchess_pieces_construct:
            }

          \bool_if:NF \g__cchess_draft_bool
            {
              % 构建棋盘
              \__cchess_board_option_if_in:nT { #2 }
                {
                  \__cchess_board_construct:
                }
              % 构建红黑各9个棋子
              \__cchess_piece_option_if_in:nT { #2 }
                {
                  \__cchess_pieces_construct:
                }
            }
        }
      \__cchess_board_output:
    \group_end:
  }

% 棋谱排版命令用户接口
% #1 棋盘类型、棋子类型等外观选项
% #2 棋子位置列表
%    红棋：K=帅,A=仕,E/B=相,R=车,C=砲,N/H=马,P=兵,
%    黑棋：k=将,a=士,e/b=象,r=車,c=炮,n/h=馬,p=卒
%    横向定位: a(0),b(1),c(2),d(3),e(4),f(5),g(6),h(7),i(8)
%    纵向定位: a(0),b(1),c(2),d(3),e(4),f(5),g(6),h(7),i(8),j(9)
\NewDocumentCommand{\cchessman}{ o m }
  {
    \group_begin:
      % 设置选项
      \IfNoValueF { #1}
        {
          \keys_set:nn { cchess } { #1 }

          % 有draft参数，需要重构棋子和棋盘
          \tl_if_in:nnT { #1 } { draft }
            {
              % 构建棋盘
              \__cchess_board_construct:
              % 构建红黑各9个棋子
              \__cchess_pieces_construct:
            }

          \bool_if:NF \g__cchess_draft_bool
            {
              % 构建棋盘
              \__cchess_board_option_if_in:nT { #1 }
                {
                  \__cchess_board_construct:
                }
              % 构建红黑各9个棋子
              \__cchess_piece_option_if_in:nT { #1 }
                {
                  \__cchess_pieces_construct:
                }
            }
        }
      \__cchess_manual_output:n { #2 }
    \group_end:
  }

% 棋子字符复位
\NewDocumentCommand{\resetpiece}{}
  {
    % 定义棋子字符常量
    \clist_map_inline:nn
      {
        { K } { 帥 }, % 帥\__cchess_symbol:n {"5E25}
        { A } { 仕 }, % 仕\__cchess_symbol:n {"4ED5}
        { E } { 相 }, % 相\__cchess_symbol:n {"76F8}
        { B } { 相 }, % 相\__cchess_symbol:n {"76F8}
        { H } { 马 }, % 马\__cchess_symbol:n {"9A6C}
        { N } { 马 }, % 马\__cchess_symbol:n {"9A6C}
        { R } { 车 }, % 车\__cchess_symbol:n {"8F66}
        { C } { ç ² }, % ç ²\__cchess_symbol:n {"7832}
        { P } { å…µ }, % å…µ\__cchess_symbol:n {"5175}
        { k } { å°‡ }, % å°‡\__cchess_symbol:n {"5C07}
        { a } { 士 }, % 士\__cchess_symbol:n {"58EB}
        { e } { 象 }, % 象\__cchess_symbol:n {"8C61}
        { b } { 象 }, % 象\__cchess_symbol:n {"8C61}
        { h } { 馬 }, % 馬\__cchess_symbol:n {"99AC}
        { n } { 馬 }, % 馬\__cchess_symbol:n {"99AC}
        { r } { 車 }, % 車\__cchess_symbol:n {"8ECA}
        { c } { ç‚® }, % ç‚®\__cchess_symbol:n {"70AE}
        { p } { 卒 }, % 卒\__cchess_symbol:n {"5352}
      }
      { \__cchess_piece_char_setup:nn ##1 }

    \bool_if:NF \g__cchess_draft_bool
      {
        % 构建红黑各9个棋子
        \__cchess_pieces_construct:
      }
  }

% 棋子字符设置命令
% #1 棋子编号及字符
% K=帅,A=仕,B/E=相,R=车,C=砲,N/H=马,P=兵
% k=将,a=士,b/e=象,r=車,c=炮,n/h=馬,p=卒
\NewDocumentCommand{\piecechar}{ m m }
  {
    \__cchess_piece_char_setup:nn { #1 } { #2 }

    \bool_if:NF \g__cchess_draft_bool
      {
        % 构建红黑各9个棋子
        \__cchess_pieces_construct:
      }
  }

% 打谱环境初始化(仅用于setcchessman环境中)
% #1 棋子位置列表
%    红棋：K=帅,A=仕,E/B=相,R=车,C=砲,N/H=马,P=兵,
%    黑棋：k=将,a=士,e/b=象,r=車,c=炮,n/h=馬,p=卒
%    横向定位: a(0),b(1),c(2),d(3),e(4),f(5),g(6),h(7),i(8)
%    纵向定位: a(0),b(1),c(2),d(3),e(4),f(5),g(6),h(7),i(8),j(9)
\NewDocumentCommand{\init}{ m }
  {
    % 临时clist
    \clist_set:Nn \l_tmpa_clist { #1 }

    % 替换占位盒子内容
    \clist_map_inline:Nn \l_tmpa_clist
      { \__cchess_piece_replace_handle:nn  ##1 }
  }

% 打谱环境中的棋子布置命令(仅用于setcchessman环境中)
% #1 棋子位置
% #2 棋子位置列表
%    红棋：K=帅,A=仕,E/B=相,R=车,C=砲,N/H=马,P=兵,
%    黑棋：k=将,a=士,e/b=象,r=車,c=炮,n/h=馬,p=卒
%    横向定位: a(0),b(1),c(2),d(3),e(4),f(5),g(6),h(7),i(8)
%    纵向定位: a(0),b(1),c(2),d(3),e(4),f(5),g(6),h(7),i(8),j(9)
\NewDocumentCommand{\set}{ m m }
  {
    \__cchess_piece_replace_handle:nn { #1 } { #2 }
  }

% 删除打谱环境中的棋子(仅用于setcchessman环境中)
% #1 棋子位置列表
%    横向定位: a(0),b(1),c(2),d(3),e(4),f(5),g(6),h(7),i(8)
%    纵向定位: a(0),b(1),c(2),d(3),e(4),f(5),g(6),h(7),i(8),j(9)
\NewDocumentCommand{\del}{ m }
  {
    \__cchess_piece_remove_handle:n { #1 }
  }

% 移动打谱环境中的棋子(仅用于setcchessman环境中)
% #1 棋子名称(单个英文字母)
% #2 棋子当前位置
% #3 棋子目的位置
%    红棋：K=帅,A=仕,E/B=相,R=车,C=砲,N/H=马,P=兵,
%    黑棋：k=将,a=士,e/b=象,r=車,c=炮,n/h=馬,p=卒
%    横向定位: a(0),b(1),c(2),d(3),e(4),f(5),g(6),h(7),i(8)
%    纵向定位: a(0),b(1),c(2),d(3),e(4),f(5),g(6),h(7),i(8),j(9)
\NewDocumentCommand{\mov}{ m m m }
  {
    \__cchess_piece_move_handle:nnn { #1 } { #2 } { #3 }
  }

% 打谱排版环境用户接口
% #1 棋盘类型、棋子类型等外观选项
\NewDocumentEnvironment{ setcchessman }{ o +b }
  {
    \group_begin:
      \bool_set_false:N  \l__cchess_with_setman_bool

      % 设置选项
      \IfNoValueF { #1}
        {
          \keys_set:nn { cchess } { #1 }

          % 有draft参数，需要重构棋子和棋盘
          \tl_if_in:nnT { #1 } { draft }
            {
              % 构建棋盘
              \__cchess_board_construct:
              % 构建红黑各9个棋子
              \__cchess_pieces_construct:
            }

          \bool_if:NF \g__cchess_draft_bool
            {
              % 构建棋盘
              \__cchess_board_option_if_in:nT { #1 }
                {
                  \__cchess_board_construct:
                }
              % 构建红黑各9个棋子
              \__cchess_piece_option_if_in:nT { #1 }
                {
                  \__cchess_pieces_construct:
                }
            }
        }
      \__cchess_setcchessman_pre_setup:n { #2 }
  }{
      \__cchess_setcchessman_post_setup:
    \group_end:
  }

% 打谱排版星号环境用户接口，用于同时输出棋谱描述
% #1 棋盘类型、棋子类型等外观选项
\NewDocumentEnvironment{ setcchessman* }{ o +b }
  {
    \group_begin:
      \bool_set_true:N  \l__cchess_with_setman_bool
      % 设置选项
      \keys_set:nn { cchess } { #1 }
      \__cchess_setcchessman_pre_setup:n { #2 }
  }{
      \__cchess_setcchessman_post_setup:
    \group_end:
  }

% 打谱棋谱输出用户接口
% #1 每行输出步数
% #2 棋谱交叉引用label
% 参考雾月的回复：https://ask.latexstudio.net/ask/question/7430.html
\NewDocumentCommand{\printman}{ O{} >{\TrimSpaces} m } % 去掉两侧空格
  {
    \group_begin:
      % 设置选项
      \keys_set:nn { cchess } { #1 }
      \__cchess_setman_print:n { #2 }
    \group_end:
  }

% 棋子输出用户接口
% #1 棋子字体字号
% #2 棋子编码
%    红棋：K=帅,A=仕,E/B=相,R=车,C=砲,N/H=马,P=兵,
%    黑棋：k=将,a=士,e/b=象,r=車,c=炮,n/h=馬,p=卒
\NewDocumentCommand{\getpiece}{ O{\normalsize} m }
  {
    \group_begin:
      \__cchess_getpiece_handle:nn {#1} { #2 }
    \group_end:
  }

% ==========棋子字符常量定义=====================
% 读取符号
\cs_new:Npn \__cchess_symbol:n #1
  {
    #1
    % \tex_char:D #1
    % \scan_stop:
  }

% 棋子符号定义
\cs_new_protected:Npn \__cchess_piece_define:nn #1#2
  {
    \tl_const:cn { c__cchess_ #1 _tl } { \__cchess_symbol:n { #2 } }
  }

% ==========变量定义=====================
% 绘制棋盘时是否带有棋子标志
\bool_new:N   \l__cchess_board_pieces_bool
\bool_new:N   \l__cchess_with_setman_bool
\bool_new:N   \g__cchess_draft_bool

% 棋子容器
% 当前中国象棋主流软件的棋子代码，多沿用:
% K  A  B  N  R  C  P
% 帅 仕 相 马 车 炮 兵
% （红方用大写字母，黑方小写）
% 出于对国际象棋棋手意识习惯的兼容性设计
% 相 B ，也可兼容使用 E，
% 马N， 也可兼容使用 H 代替
% 在此，为兼容性考虑使用B/E同时表示相，使用H/N同时表示马
% 在使用时，可以任意选择习惯的名称

% 判断红黑棋子英文单字母名称的正则表达式
\regex_new:N \l__capital_regex
\regex_set:Nn \l__capital_regex { [KAEBRCHNP] }

% 棋子英文单字母名称列表
\clist_const:Nn \c__cchess_pieces_name_clist { K,A,E,B,R,C,H,N,P,k,a,e,b,r,c,h,n,p }
\msg_new:nnn { cchess } { piecename-exists } { The~ piece~ name~ `#1~ not~ exists. }

% 定义棋子字符常量
% 注意相和马分别用两个符号以适配不同习惯
\clist_map_inline:nn
  {
    { K } { 帥 }, % 帥"5E25
    { A } { 仕 }, % 仕"4ED5
    { E } { 相 }, % 相"76F8
    { B } { 相 }, % 相"76F8
    { H } { 马 }, % 马"9A6C
    { N } { 马 }, % 马"9A6C
    { R } { 车 }, % 车"8F66
    { C } { ç ² }, % ç ²"7832
    { P } { å…µ }, % å…µ"5175
    { k } { å°‡ }, % å°‡"5C07
    { a } { 士 }, % 士"58EB
    { e } { 象 }, % 象"8C61
    { b } { 象 }, % 象"8C61
    { h } { 馬 }, % 馬"99AC
    { n } { 馬 }, % 馬"99AC
    { r } { 車 }, % 車"8ECA
    { c } { ç‚® }, % ç‚®"70AE
    { p } { 卒 }, % 卒"5352
  }
  { \__cchess_piece_define:nn #1 }

% 定义棋子编码与字符对照属性表
\prop_new:N \c__cchess_board_pieces_alph_name_prop
\clist_map_inline:Nn \c__cchess_pieces_name_clist
  {
    \prop_put:NnV \c__cchess_board_pieces_alph_name_prop
      { #1 } { \use:c { c__cchess_ #1 _tl } }
  }

% 在棋子编码列表中添加z表示空棋子
\clist_push:Nn \c__cchess_pieces_name_clist { z }

% 定义棋子盒子容器
\clist_map_inline:Nn \c__cchess_pieces_name_clist
  {
    \coffin_new:c { l__cchess_piece_ #1 _coffin }
  }
% 将空棋子盒子容器置空
\hcoffin_gset:Nn \l__cchess_piece_z_coffin { \phantom{a} }

% 棋盘盒子容器
\coffin_new:N \l__cchess_board_coffin
% 棋盘背景盒子容器
\coffin_new:N \l__cchess_board_background_coffin

% 棋谱容器
\coffin_new:N \l__cchess_manual_coffin

% 判断是否为字母位置的正则表达式
\regex_new:N \l__alph_regex
\regex_set:Nn \l__alph_regex { [a-j] }

% 棋子位置字母与数字对应关系
\prop_const_from_keyval:Nn \c__cchess_board_pos_alph_num_prop
  {
    a = 0, b = 1, c = 2 , d = 3, e = 4,
    f = 5, g = 6, h = 7, i = 8, j = 9
  }

\coffin_new:N \l__cchess_board_pieces_pos_coffin

% 判断是否为数值位置的正则表达式
\regex_new:N \l__digit_regex
\regex_set:Nn \l__digit_regex { [0-9] }

% 棋子位置数字与字母对应关系
\prop_const_from_keyval:Nn \c__cchess_board_pos_num_alph_prop
  {
    0 = a, 1 = b, 2 = c, 3 = d, 4 = e,
    5 = f, 6 = g, 7 = h, 8 = i, 9 = j
  }

% 判断是横向位置合法性的列表
\clist_const:Nn \c__cchess_pos_x_index_clist
  { a,b,c,d,e,f,g,h,i,0,1,2,3,4,5,6,7,8 }
\msg_new:nnn { cchess } { posx-exists } { The~ x~ index~ `#1~ not~ exists. }
% 判断是纵向位置合法性的列表
\clist_const:Nn \c__cchess_pos_y_index_clist
  { a,b,c,d,e,f,g,h,i,j,0,1,2,3,4,5,6,7,8,9 }
\msg_new:nnn { cchess } { posy-exists } { The~ y~ index~ `#1~ not~ exists. }

% 棋子占位盒子容器
\clist_const:Nn \c__cchess_board_pos_x_clist
  { a,b,c,d,e,f,g,h,i }
\clist_const:Nn \c__cchess_board_pos_y_clist
  { a,b,c,d,e,f,g,h,i,j }
\clist_map_inline:Nn \c__cchess_board_pos_x_clist
  {
    \clist_map_inline:Nn \c__cchess_board_pos_y_clist
      {
        \coffin_new:c { l__cchess_board_piece_ #1 _ ##1 _coffin }
        \hcoffin_gset:cn { l__cchess_board_piece_ #1 _ ##1 _coffin }
          { \phantom{a} }
      }
  }
\coffin_new:N \l__cchess_board_piece_z_coffin
\hcoffin_gset:Nn \l__cchess_board_piece_z_coffin { \phantom{a} }

% 红方棋盘坐标字母与红棋竖线标位对应关系
\prop_const_from_keyval:Nn \c__cchess_board_red_x_idx_prop
  {
    a = 九, b = 八, c = 七 , d = 六, e = 五,
    f = 四, g = 三, h = 二, i = 一
  }

% 黑方棋盘坐标字母与黑棋竖线标位对应关系
\prop_const_from_keyval:Nn \c__cchess_board_black_x_idx_prop
  {
    a = 1, b = 2, c = 3 , d = 4, e = 5,
    f = 6, g = 7, h = 8, i = 9
  }

% 英文数字与中文数字的对应关系
\prop_const_from_keyval:Nn \c__cchess_board_pos_arabic_zh_prop
  {
    0 = 〇, 1 = 一, 2 = 二, 3 = 三, 4 = 四,
    5 = 五, 6 = 六, 7 = 七, 8 = 八, 9 = 九
  }

% 棋谱记录列表(如车一进二等)
\clist_new:N \l__cchess_manual_clist

% 棋子外框盒子容器
\coffin_new:N \l__cchess_box_coffin
% 棋子盒子容器
\coffin_new:N \l__cchess_piece_coffin
% 楚河汉界盒子容器
\coffin_new:N \l__cchess_char_a_coffin
\coffin_new:N \l__cchess_char_b_coffin
\coffin_new:N \l__cchess_char_c_coffin
\coffin_new:N \l__cchess_char_d_coffin
% 临时盒子容器
\coffin_new:N \l__cchess_tmpa_coffin
\coffin_new:N \l__cchess_tmpb_coffin
\coffin_new:N \l__cchess_tmpc_coffin
\coffin_new:N \l__cchess_tmpd_coffin

\clist_set:Nn \l_tmpa_clist { a,b,c,d }
\clist_map_inline:Nn \l_tmpa_clist
  {
    \coffin_new:c { l_char_tmp #1 _coffin }
  }

% 棋子类型
\tl_new:N     \l__cchess_piece_box_type_tl
% 棋子类型列表
\clist_new:N  \g__cchess_piece_box_list_clist
% 棋盘类型
\tl_new:N     \l__cchess_board_type_tl
% 棋盘类型列表
\clist_new:N  \g__cchess_board_list_clist

% 缩放方式
\tl_new:N     \l__cchess_resize_method_tl
% 缩放方式列表
\clist_new:N  \g__cchess_resize_method_clist

% 棋谱输出宽度
\dim_new:N    \l__cchess_manual_width_dim
% 棋谱输出高度
\dim_new:N    \l__cchess_manual_height_dim

% 棋盘宽度
\dim_new:N    \l__cchess_board_width_dim
% 棋盘高度
\dim_new:N    \l__cchess_board_height_dim

% 棋盘线线宽
\dim_new:N    \l__cchess_board_linewidth_dim
% 辅线线宽
\dim_new:N    \l__cchess_cross_linewidth_dim
% 辅线间距
\dim_new:N    \l__cchess_cross_sep_dim
% 棋子字符正方形外接圆半径
\dim_new:N    \l__cchess_piece_box_radius_dim
% 棋子外框线线宽
\dim_new:N    \l__cchess_box_linewidth_dim

% 棋盘格子尺寸
\dim_new:N    \gridsize
% 棋子整体尺寸
\dim_new:N    \piecesize
% 棋子字符包围盒尺寸
\dim_new:N    \charboxsize
% 棋子字符包围盒尺寸半长
\dim_new:N    \semicharboxsize

% 临时尺寸变量
\dim_new:N    \l__cchess_tmpa_dim
\dim_new:N    \l__cchess_tmpb_dim
\dim_new:N    \l__cchess_tmpc_dim
\dim_new:N    \l__cchess_tmpd_dim

% 棋子字符格式
\tl_new:N    \l__cchess_piece_char_format_tl
% 棋盘背景图片名称
\tl_new:N    \l__cchess_board_background_tl
% 棋子字符字形类型(实线、虚线等)
\int_new:N   \l__cchess_charstroke_type_int

% 打谱环境棋谱标签
\tl_new:N    \l__cchess_setman_label_tl
% 打谱结果每行棋谱步数
\int_new:N   \l__cchess_mans_per_line_int

% 打谱环境用计数器
\newcounter{setman}

% 增加两个临时int变量
\int_new:N \l_tmpc_int
\int_new:N \l_tmpd_int
\int_new:N \l_tmpe_int
% 增加两个临时tl变量
\tl_new:N \l_tmpc_tl
\tl_new:N \l_tmpd_tl
\tl_new:N \l_tmpe_tl

% ============宏包选项=================
\keys_define:nn { cchess }
  {
    draft .choice:,
    draft / true  .code:n = { \bool_set_true:N  \g__cchess_draft_bool },
    draft / false .code:n = { \bool_set_false:N \g__cchess_draft_bool },
    draft .default:n = true,
    draft .initial:n = false,

    unknown .code:n = { \msg_error:nn { cchess } { unknown-option } }
  }

% 将文档类选项传给cchess
% \ProcessKeysOptions { cchess }

% 棋子盒子由l3draw实现，
% 棋子外围盒子及缩放设计思路来自zitie宏包
% (\url{https://www.ctan.org/pkg/zitie})。

% =============颜色处理函数=============
% 填充色辅助函数
\cs_new_nopar:Nn \__cchess_aux_color_boxfill:
  { }

% 颜色命名函数
% #1 颜色名称
% #2 颜色表达式
\cs_set_nopar:Npn \__cchess_color_select:nn #1#2
  {
    \color_set:nn {#1} {#2}
  }
\cs_generate_variant:Nn \__cchess_color_select:nn {nx}

% 颜色命名函数
% #1 颜色名称
% #2 颜色空间
% #3 颜色分量值
\cs_set_nopar:Npn \__cchess_color_select:nnn #1#2#3
  {
    \color_set:nnn {#1} {#2} {#3}
  }
\cs_generate_variant:Nn \__cchess_color_select:nnn {nnx}

% =============基础尺寸计算函数=============
% 盒子容器总高度计算函数
\cs_new_nopar:Npn \__cchess_coffin_ht_plus_dp:N #1
  {
    \coffin_ht:N #1 + \coffin_dp:N #1
  }

% 计算外框大小(外接正方形边长和外接圆半径)
\cs_new:Npn \__cchess_calc_piece_box_size:
  {
    % 设置计算基础盒子
    \hbox_set:Nn \l_tmpa_box { xx }

    % 盒子宽度
    \dim_set:Nn \l_tmpa_dim
      {
        \box_wd:N \l_tmpa_box
      }
    % 盒子高度
    \dim_set:Nn \l_tmpb_dim
      {
        \box_ht_plus_dp:N \l_tmpa_box
      }

    % 正方形边长
    \dim_compare:nNnTF \l_tmpa_dim > \l_tmpb_dim
      {
        \dim_gset_eq:NN \charboxsize \l_tmpa_dim
      }
      {
        \dim_gset_eq:NN \charboxsize \l_tmpb_dim
      }

    \dim_gadd:Nn \charboxsize { 2pt }

    % 包围盒半长
    \dim_gset:Nn \semicharboxsize
      {
        \fp_to_dim:n { \fp_eval:n { \charboxsize / 2 } }
        % \charboxsize / 2
      }

    % 外接圆半径
    \dim_gset:Nn \l__cchess_piece_box_radius_dim
      {
        \fp_to_dim:n { \fp_eval:n { \charboxsize * sqrt(2)/ 2 } }
        % \fp_to_dim:n { \fp_eval:n { \charboxsize * 0.707106781 } }
      }
  }

% =============构造棋子函数=============
% 字符盒子构造类型函数名称生成函数
% #1 缩放比例
\cs_new_nopar:Npn \__cchess_piece_box_type:n #1
  {
    __cchess_piece_box_construct_type_ #1 :n
  }
% 字符盒子构造类型函数名称命令生成函数
% #1 缩放比例
\cs_new_nopar:Npn \__cchess_piece_box_type_c:n #1
  {
    \use:c { __cchess_piece_box_construct_type_ #1 :n }
  }

% 字符盒子构造类型函数内部生成器函数
% #1 类型名称
\cs_new:Npn \__cchess_new_piece_box_private_construct:nn #1
  {
    % 类似\cs_new:cn __cchess_piece_box_construct_type_none:n
    \cs_new:cn { \__cchess_piece_box_type:n {#1} }
  }
\cs_generate_variant:Nn \__cchess_new_piece_box_private_construct:nn { V }
\cs_generate_variant:Nn \__cchess_new_piece_box_private_construct:nn { x }

% 字符盒子构造类型函数生成器函数
% #1 类型名称
\cs_new:Npn \__cchess_new_piece_box_construct:nn #1
  {
    % 将类型名称记入clist
    \clist_put_right:Nn \g__cchess_piece_box_list_clist {#1}
    % 类似\cs_new:cn __cchess_piece_box_construct_type_none:n
    \cs_new:cn { \__cchess_piece_box_type:n {#1} }
  }
\cs_generate_variant:Nn \__cchess_new_piece_box_construct:nn { V }
\cs_generate_variant:Nn \__cchess_new_piece_box_construct:nn { x }

% 定义字符边框盒子类型内部函数
% 无边框
\__cchess_new_piece_box_construct:nn { none } { }

% 底层填充外接圆
\__cchess_new_piece_box_private_construct:nn { __outerlowerfilledcircle }
  {
    \draw_scope_begin:
      \color_fill:n { lowerbgboxfill }
      \draw_path_circle:nn { \semicharboxsize, \semicharboxsize }
        { \l__cchess_piece_box_radius_dim*#1 }
      \draw_path_use_clear:n { fill }
    \draw_scope_end:
  }

% 顶层填充外接圆
\__cchess_new_piece_box_private_construct:nn { __outerupperfilledcircle }
  {
    \draw_scope_begin:
      \color_fill:n { upperbgboxfill }
      \draw_path_circle:nn { \semicharboxsize, \semicharboxsize }
        { \l__cchess_piece_box_radius_dim*#1 }
      \draw_path_use_clear:n { fill }
    \draw_scope_end:
  }

% 圆环层填充外接圆
\__cchess_new_piece_box_private_construct:nn { __outerdonutfilledcircle }
  {
    \draw_scope_begin:
      \color_fill:n { donutboxfill }
      \draw_path_circle:nn { \semicharboxsize, \semicharboxsize }
        { \l__cchess_piece_box_radius_dim*#1 }
      \draw_path_use_clear:n { fill }
    \draw_scope_end:
  }

% 阴影填充外接圆
\__cchess_new_piece_box_private_construct:nn { __outershadowfilledcircle }
  {
    \draw_scope_begin:
      \color_fill:n { shadowboxfill   }
      \draw_transform_shift:n { \charboxsize*0.1, -\charboxsize*0.1 }
      \draw_path_circle:nn { \semicharboxsize, \semicharboxsize }
        { \l__cchess_piece_box_radius_dim*#1 }
      \draw_path_use_clear:n { fill }
    \draw_scope_end:
  }

% 外接圆边框
\__cchess_new_piece_box_private_construct:nn { __outercirclebox }
  {
    \draw_scope_begin:
      \color_stroke:n { cchesspieceboxcolor }
      \draw_path_circle:nn { \semicharboxsize, \semicharboxsize }
        { \l__cchess_piece_box_radius_dim*#1 }
      \draw_path_use_clear:n { stroke }
    \draw_scope_end:
  }

% 填充外接圆叠加外接圆边框
\__cchess_new_piece_box_construct:nn { o }
  {
    \__cchess_piece_box_type_c:n { __outerupperfilledcircle } {0.82}
    \__cchess_piece_box_type_c:n { __outercirclebox } {0.82}
  }

% 填充外接圆叠加同心82%外接圆边框
\__cchess_new_piece_box_construct:nn { oo }
  {
    \__cchess_piece_box_type_c:n { __outerupperfilledcircle } {#1}
    \__cchess_piece_box_type_c:n { __outercirclebox } {#1}
    \__cchess_piece_box_type_c:n { __outercirclebox } {0.82}
  }

% 3同心圆叠加(阴影)
\__cchess_new_piece_box_construct:nn { ooo }
  {
    % 绘制填充外接圆阴影
    \__cchess_piece_box_type_c:n { __outershadowfilledcircle } {1.0}
    % 绘制填充外接圆外圈背景
    \__cchess_piece_box_type_c:n { __outerlowerfilledcircle } {1.0}
    % 绘制填充外接边环背景
    \__cchess_piece_box_type_c:n { __outerdonutfilledcircle } {0.88}
    % 绘制填充外接圆内圈背景
    \__cchess_piece_box_type_c:n { __outerupperfilledcircle } {0.72}
    % 绘制双边刻环线
    \__cchess_piece_box_type_c:n { __outercirclebox } {0.88}
    \__cchess_piece_box_type_c:n { __outercirclebox } {0.72}
  }

\msg_new:nnn { cchess } { box-exists } { The~ box~ type~ `#1~ not~ exists. }

% =============构造棋盘函数=============
% 棋盘部件构造函数函数名称生成函数
% 名称中2个参数分别表示：
% #1 x方向缩放比例(暂未使用, 保留参数)
% #2 y方向缩放比例(暂未使用, 保留参数)
\cs_new_nopar:Npn \__cchess_board_type:n #1
  {
    __cchess_board_construct_type_ #1 :nn
  }
% 名称命令中2个参数分别表示：
% #1 x方向缩放比例(暂未使用, 保留参数)
% #2 y方向缩放比例(暂未使用, 保留参数)
\cs_new_nopar:Npn \__cchess_board_type_c:n #1
  {
    \use:c { __cchess_board_construct_type_ #1 :nn }
  }

% 棋盘类型函数生成器内部函数
% #1 类型名称
\cs_new:Npn \__cchess_new_board_private_construct:nn #1
  {
    % 类似\cs_new:cn __cchess_board_construct_type_none:nn
    \cs_new:cn { \__cchess_board_type:n {#1} }
  }
\cs_generate_variant:Nn \__cchess_new_board_private_construct:nn { V }
\cs_generate_variant:Nn \__cchess_new_board_private_construct:nn { x }

% 棋盘类型函数生成器函数
% #1 类型名称
\cs_new:Npn \__cchess_new_board_construct:nn #1
  {
    % 将类型名称记入clist
    \clist_put_right:Nn \g__cchess_board_list_clist {#1}
    % 类似\cs_new:cn __cchess_board_construct_type_none:nn
    \cs_new:cn { \__cchess_board_type:n {#1} }
  }
\cs_generate_variant:Nn \__cchess_new_board_construct:nn { V }
\cs_generate_variant:Nn \__cchess_new_board_construct:nn { x }

% 空棋盘
\__cchess_new_board_construct:nn { none } { }

% 仅格子线半部棋盘
\__cchess_new_board_private_construct:nn { __semiboard }
  {
    \draw_scope_begin:
      \color_stroke:n { cchessboardlinecolor }
      % 绘制棋盘网格
      \draw_path_grid:nnnn { \gridsize } { \gridsize }
        { 0, 0 } { \gridsize * 8, \gridsize * 4 }

      % 绘制半长边格线
      \draw_path_moveto:n { 0    , \gridsize * 4   }
      \draw_path_lineto:n { 0    , \gridsize * 4.5 }
      \draw_path_moveto:n { \gridsize * 8, \gridsize * 4   }
      \draw_path_lineto:n { \gridsize * 8, \gridsize * 4.5 }

      \draw_path_use_clear:n { stroke }
    \draw_scope_end:
  }

% 兵、炮4分位标志(右上)
\__cchess_new_board_private_construct:nn { __quaterpos }
  {
    % 计算标志长度
    \dim_set:Nn \l_tmpa_dim
      { \fp_to_dim:n { \fp_eval:n { \gridsize * 0.10 } } }

    \draw_scope_begin:
      \color_stroke:n { cchessboardlinecolor }
      \draw_path_scope_begin:
        \draw_linewidth:n { \l__cchess_cross_linewidth_dim }
        \draw_path_moveto:n { 0pt        , \l_tmpa_dim }
        \draw_path_lineto:n { 0pt        , 0pt         }
        \draw_path_lineto:n { \l_tmpa_dim, 0pt         }
        \draw_path_use_clear:n { stroke }
      \draw_path_scope_end:
    \draw_scope_end:
  }

% 兵、炮全位标志
\__cchess_new_board_private_construct:nn { __fullpos }
  {
    \draw_scope_begin:
      \draw_path_scope_begin:
        \draw_transform_shift:n { \l__cchess_cross_sep_dim, \l__cchess_cross_sep_dim }
        \__cchess_board_type_c:n { __quaterpos } {#1} {#2}
      \draw_path_scope_end:
      \draw_path_scope_begin:
        \draw_transform_shift:n { -\l__cchess_cross_sep_dim, \l__cchess_cross_sep_dim }
        \draw_transform_rotate:n { 90 }
        \__cchess_board_type_c:n { __quaterpos } {#1} {#2}
      \draw_path_scope_end:
      \draw_path_scope_begin:
        \draw_transform_shift:n { -\l__cchess_cross_sep_dim, -\l__cchess_cross_sep_dim }
        \draw_transform_rotate:n { 180 }
        \__cchess_board_type_c:n { __quaterpos } {#1} {#2}
      \draw_path_scope_end:
      \draw_path_scope_begin:
        \draw_transform_shift:n { \l__cchess_cross_sep_dim, -\l__cchess_cross_sep_dim }
        \draw_transform_rotate:n { 270 }
        \__cchess_board_type_c:n { __quaterpos } {#1} {#2}
      \draw_path_scope_end:
    \draw_scope_end:
  }

% 右向兵半位标志
\__cchess_new_board_private_construct:nn { __rightsemipos }
  {
    \draw_scope_begin:
      \draw_path_scope_begin:
        \draw_transform_shift:n { \l__cchess_cross_sep_dim, \l__cchess_cross_sep_dim }
        \__cchess_board_type_c:n { __quaterpos } {#1} {#2}
      \draw_path_scope_end:
      \draw_path_scope_begin:
        \draw_transform_shift:n { \l__cchess_cross_sep_dim, -\l__cchess_cross_sep_dim }
        \draw_transform_rotate:n { -90 }
        \__cchess_board_type_c:n { __quaterpos } {#1} {#2}
      \draw_path_scope_end:
    \draw_scope_end:
  }

% 左向兵半位标志
\__cchess_new_board_private_construct:nn { __leftsemipos }
  {
    \draw_scope_begin:
      \draw_path_scope_begin:
        \draw_transform_shift:n { -\l__cchess_cross_sep_dim, \l__cchess_cross_sep_dim }
        \draw_transform_rotate:n { 90 }
        \__cchess_board_type_c:n { __quaterpos } {#1} {#2}
      \draw_path_scope_end:
      \draw_path_scope_begin:
        \draw_transform_shift:n { -\l__cchess_cross_sep_dim, -\l__cchess_cross_sep_dim }
        \draw_transform_rotate:n { 180 }
        \__cchess_board_type_c:n { __quaterpos } {#1} {#2}
      \draw_path_scope_end:
    \draw_scope_end:
  }

% 兵、炮标志(半棋盘)
\__cchess_new_board_private_construct:nn { __semipos }
  {
    \hcoffin_set:Nn \l_tmpa_coffin
      {
        \draw_scope_begin:
          % 绘制兵、炮定位标志
          \clist_map_variable:nNn {{1,2},{7,2},{2,3},{4,3},{6,3}} \l_tmpa_tl
            {
              \clist_set:NV \l_tmpa_clist \l_tmpa_tl
              \dim_set:Nn \l_tmpa_dim
                {
                  \fp_to_dim:n
                    {
                      \fp_eval:n { \gridsize * \clist_item:Nn \l_tmpa_clist { 1 } }
                    }
                }
              \dim_set:Nn \l_tmpb_dim
                {
                  \fp_to_dim:n
                    {
                      \fp_eval:n { \gridsize * \clist_item:Nn \l_tmpa_clist { 2 } }
                    }
                }
              \draw_path_scope_begin:
                \draw_transform_shift:n { \l_tmpa_dim, \l_tmpb_dim }
                \__cchess_board_type_c:n { __fullpos } {#1} {#2}
              \draw_path_scope_end:
            }

          \draw_path_scope_begin:
            \draw_transform_shift:n { 0, \gridsize * 3 }
            \__cchess_board_type_c:n { __rightsemipos } {#1} {#2}
          \draw_path_scope_end:

          \draw_path_scope_begin:
            \draw_transform_shift:n { \gridsize * 8, \gridsize * 3 }
            \__cchess_board_type_c:n { __leftsemipos } {#1} {#2}
          \draw_path_scope_end:

        \draw_scope_end:
      }
    % 使用盒子容器
    \draw_path_scope_begin:
      \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }
    \draw_path_scope_end:
  }

% 无兵、炮标志全棋盘
\__cchess_new_board_private_construct:nn { __semiboardwithpos }
  {
    \hcoffin_set:Nn \l_tmpa_coffin
      {
        \__cchess_board_type_c:n { __semiboard } {#1} {#2}
        \__cchess_board_type_c:n { __semipos } {#1} {#2}
      }
    % 使用盒子容器
    \draw_path_scope_begin:
      \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }
    \draw_path_scope_end:
  }

% 九宫对角线
\__cchess_new_board_private_construct:nn { __dguardcross }
  {
    \draw_scope_begin:
      \color_stroke:n { cchessboardlinecolor }
      \draw_path_scope_begin:
        \draw_linewidth:n { \l__cchess_cross_linewidth_dim }
        \draw_transform_shift:n { \gridsize * 3, 0       }

        \draw_path_moveto:n { 0          , \gridsize * 2 }
        \draw_path_lineto:n { \gridsize * 2, 0           }
        \draw_path_moveto:n { 0          , 0           }
        \draw_path_lineto:n { \gridsize * 2, \gridsize * 2 }
        \draw_path_use_clear:n { stroke }
      \draw_path_scope_end:
    \draw_scope_end:
  }

% 象位虚线
\__cchess_new_board_private_construct:nn { __elephantcross }
  {
    \draw_scope_begin:
      \color_stroke:n { cchessboardlinecolor }
      \draw_path_scope_begin:
        \draw_linewidth:n { \l__cchess_cross_linewidth_dim }
        \draw_dash_pattern:nn { 0.5mm , 0.5mm , 0.5mm , 0.5mm } { 0cm }
        \draw_path_moveto:n { \gridsize * 2, 0           }
        \draw_path_lineto:n { \gridsize * 6, \gridsize * 4 }
        \draw_path_lineto:n { \gridsize * 8, \gridsize * 2 }
        \draw_path_lineto:n { \gridsize * 6, 0           }
        \draw_path_lineto:n { \gridsize * 2, \gridsize * 4 }
        \draw_path_lineto:n { 0          , \gridsize * 2 }
        \draw_path_lineto:n { \gridsize * 2, 0           }
        \draw_path_use_clear:n { stroke }
      \draw_path_scope_end:
    \draw_scope_end:
  }

% 带炮、兵位标志和九宫对角线的半棋盘
\__cchess_new_board_private_construct:nn { __semiboardposdguardcross }
  {
    \hcoffin_set:Nn \l_tmpa_coffin
      {
        \__cchess_board_type_c:n { __semiboardwithpos } {#1} {#2}
        \__cchess_board_type_c:n { __dguardcross } {#1} {#2}
      }
    % 使用盒子容器
    \draw_path_scope_begin:
      \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }
    \draw_path_scope_end:
  }

% 使用盒子容器函数变体
\cs_generate_variant:Nn \draw_coffin_use:Nnn { c }

% 构建楚河汉界
\__cchess_new_board_private_construct:nn { __midseptext }
  {

    \color_select:n { cchessboardlinecolor }

    \hcoffin_set:Nn \l_char_tmpa_coffin { 楚 }
    \hcoffin_set:Nn \l_char_tmpb_coffin { æ²³ }
    \hcoffin_set:Nn \l_char_tmpc_coffin { æ¼¢ }
    \hcoffin_set:Nn \l_char_tmpd_coffin { 界 }

    \clist_map_inline:nn { a, b }
      {
        \coffin_rotate:cn { l_char_tmp ##1 _coffin } { -90 }
      }
    \clist_map_inline:nn { c, d }
      {
        \coffin_rotate:cn { l_char_tmp ##1 _coffin } { 90 }
      }

    % 测量盒子容器总高度
    \dim_set:Nn \l_tmpa_dim
      { \__cchess_coffin_ht_plus_dp:N \l_char_tmpa_coffin }

    \dim_set:Nn \l_tmpb_dim
      {
        \fp_to_dim:n { \fp_eval:n { \gridsize * 0.45 } }
      }

    % 缩放盒子容器
    \clist_map_inline:nn { a, b, c, d }
      {
        \coffin_scale:cnn { l_char_tmp ##1 _coffin }
          {
            \dim_ratio:nn { \l_tmpb_dim } { \l_tmpa_dim }
          }{
            \dim_ratio:nn { \l_tmpb_dim } { \l_tmpa_dim }
          }
      }

    % 排版文字
    \draw_scope_begin:
      \draw_path_scope_begin:
        \draw_transform_shift:n { \gridsize * 2, \gridsize * 4.5 }
        \draw_transform_shift:n { -\gridsize / 2, 0pt }
        \draw_coffin_use:cnn { l_char_tmpb_coffin } { hc } { vc }
      \draw_path_scope_end:
      \draw_path_scope_begin:
        \draw_transform_shift:n { \gridsize * 2, \gridsize * 4.5 }
        \draw_transform_shift:n { \gridsize / 2, 0pt }
        \draw_coffin_use:cnn { l_char_tmpa_coffin } { hc } { vc }
      \draw_path_scope_end:
      \draw_path_scope_begin:
        \draw_transform_shift:n { \gridsize * 6, \gridsize * 4.5 }
        \draw_transform_shift:n { -\gridsize / 2, 0pt }
        \draw_coffin_use:cnn { l_char_tmpc_coffin } { hc } { vc }
      \draw_path_scope_end:
      \draw_path_scope_begin:
        \draw_transform_shift:n { \gridsize * 6, \gridsize * 4.5 }
        \draw_transform_shift:n { \gridsize / 2, 0pt }
        \draw_coffin_use:cnn { l_char_tmpd_coffin } { hc } { vc }
      \draw_path_scope_end:
    \draw_scope_end:
  }

% 构建数字标识
\__cchess_new_board_private_construct:nn { __tbnumtext }
  {
    \dim_set:Nn \l__cchess_tmpc_dim
      {
        \fp_to_dim:n { \fp_eval:n { \gridsize * 9 + \gridsize * 0.7 } }
      }
    \dim_set:Nn \l__cchess_tmpd_dim
      {
        \fp_to_dim:n { \fp_eval:n { -\gridsize * 0.7 } }
      }

    \color_select:n { cchessboardlinecolor }

    \clist_set:Nn \l_tmpa_clist { 1,2,3,4,5,6,7,8,9 }
    \clist_set:Nn \l_tmpb_clist { 九,八,七,六,五,四,三,二,一 }

    \hcoffin_set:Nn \l_tmpa_coffin { 五 }

    % 测量盒子容器总高度
    \dim_set:Nn \l_tmpa_dim
      { \__cchess_coffin_ht_plus_dp:N \l_tmpa_coffin }

    \dim_set:Nn \l_tmpb_dim
      {
        \fp_to_dim:n { \fp_eval:n { \gridsize * 0.25 } }
      }

    \draw_scope_begin:
      \int_set:Nn \l_tmpa_int { 0 }
      \clist_map_inline:Nn \l_tmpa_clist
        {
          \clist_pop:NN \l_tmpb_clist \l_tmpa_tl
          \hcoffin_set:Nn \l_tmpa_coffin { ##1 }
          \hcoffin_set:Nn \l_tmpb_coffin { \l_tmpa_tl }
          \coffin_scale:Nnn \l_tmpa_coffin
            {
              \dim_ratio:nn { \l_tmpb_dim } { \l_tmpa_dim }
            }{
              \dim_ratio:nn { \l_tmpb_dim } { \l_tmpa_dim }
            }
          \coffin_scale:Nnn \l_tmpb_coffin
            {
              \dim_ratio:nn { \l_tmpb_dim } { \l_tmpa_dim }
            }{
              \dim_ratio:nn { \l_tmpb_dim } { \l_tmpa_dim }
            }

          \draw_path_scope_begin:
            \draw_transform_shift:n
              { \gridsize * \l_tmpa_int, \l__cchess_tmpc_dim }
            \draw_coffin_use:Nnn \l_tmpa_coffin { hc } { vc }
          \draw_path_scope_end:

          \draw_path_scope_begin:
            \draw_transform_shift:n
              { \gridsize * \l_tmpa_int, \l__cchess_tmpd_dim }
            \draw_coffin_use:Nnn \l_tmpb_coffin { hc } { vc }
          \draw_path_scope_end:

          \int_incr:N \l_tmpa_int
        }
    \draw_scope_end:
  }

% 无兵、炮标志全棋盘
\__cchess_new_board_private_construct:nn { __none }
  {
    \hcoffin_set:Nn \l_tmpa_coffin
      {
        \__cchess_board_type_c:n { __semiboard } {#1} {#2}
      }
    % 下半部
    \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }

    % 上半部
    \draw_path_scope_begin:
      \draw_transform_shift:n { \gridsize * 8, \gridsize * 9 }
      \draw_transform_rotate:n { 180 }
      \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }
    \draw_path_scope_end:
  }

% 无兵、炮标志全棋盘
\__cchess_new_board_construct:nn { x }
  {
    \hcoffin_set:Nn \l_tmpa_coffin
      {
        \__cchess_board_type_c:n { __semiboard } {#1} {#2}
        \__cchess_board_type_c:n { __dguardcross } {#1} {#2}
      }
    % 下半部
    \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }

    % 上半部
    \draw_path_scope_begin:
      \draw_transform_shift:n { \gridsize * 8, \gridsize * 9 }
      \draw_transform_rotate:n { 180 }
      \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }
    \draw_path_scope_end:
  }

% 有兵、炮标志全棋盘
\__cchess_new_board_construct:nn { x+ }
  {
    \hcoffin_set:Nn \l_tmpa_coffin
      {
        \__cchess_board_type_c:n { __semiboardwithpos } {#1} {#2}
        \__cchess_board_type_c:n { __dguardcross } {#1} {#2}
      }
    % 下半部
    \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }

    % 上半部
    \draw_path_scope_begin:
      \draw_transform_shift:n { \gridsize * 8, \gridsize * 9 }
      \draw_transform_rotate:n { 180 }
      \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }
    \draw_path_scope_end:
  }

% 有兵、炮标志全棋盘
\__cchess_new_board_construct:nn { x+t }
  {
    \hcoffin_set:Nn \l_tmpa_coffin
      {
        \__cchess_board_type_c:n { __semiboardwithpos } {#1} {#2}
        \__cchess_board_type_c:n { __dguardcross } {#1} {#2}
      }
    % 下半部
    \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }

    % 上半部
    \draw_path_scope_begin:
      \draw_transform_shift:n { \gridsize * 8, \gridsize * 9 }
      \draw_transform_rotate:n { 180 }
      \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }
    \draw_path_scope_end:
    \__cchess_board_type_c:n { __midseptext } {#1} {#2}
  }

% 有兵、炮标志全棋盘
\__cchess_new_board_construct:nn { x+tn }
  {
    \hcoffin_set:Nn \l_tmpa_coffin
      {
        \__cchess_board_type_c:n { __semiboardwithpos } {#1} {#2}
        \__cchess_board_type_c:n { __dguardcross } {#1} {#2}
      }
    % 下半部
    \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }

    % 上半部
    \draw_path_scope_begin:
      \draw_transform_shift:n { \gridsize * 8, \gridsize * 9 }
      \draw_transform_rotate:n { 180 }
      \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }
    \draw_path_scope_end:
    \__cchess_board_type_c:n { __midseptext } {#1} {#2}
    \__cchess_board_type_c:n { __tbnumtext } {#1} {#2}
  }

% 有兵、炮标志和象位线的全棋盘
\__cchess_new_board_construct:nn { x+Xtn }
  {
    \hcoffin_set:Nn \l_tmpa_coffin
      {
        \__cchess_board_type_c:n { __semiboardwithpos } {#1} {#2}
        \__cchess_board_type_c:n { __dguardcross } {#1} {#2}
        \__cchess_board_type_c:n { __elephantcross } {#1} {#2}
      }
    % 下半部
    \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }

    % 上半部
    \draw_path_scope_begin:
      \draw_transform_shift:n { \gridsize * 8, \gridsize * 9 }
      \draw_transform_rotate:n { 180 }
      \draw_coffin_use:Nnn \l_tmpa_coffin { l } { b }
    \draw_path_scope_end:
    \__cchess_board_type_c:n { __midseptext } {#1} {#2}
    \__cchess_board_type_c:n { __tbnumtext } {#1} {#2}
  }

\msg_new:nnn { cchess } { board-exists } { The~ board~ type~ `#1~ not~ exists. }

% =============缩放处理函数=============
% 缩放类型名称生成函数
\cs_new_nopar:Npn \__cchess_resize:n #1
  {
    __cchess_processor_resize_ #1 :w
  }

% 缩放类型函数名称命令生成函数
\cs_new_nopar:Npn \__cchess_resize_c:n #1
  {
    \use:c
      {
        __cchess_processor_resize_ #1 :w
      }
  }

% 缩放代码生成函数
% #1 dim长度变量1
% #2 dim长度变量2
% #3 缩放代码1
% #4 缩放代码2
% #5 缩放代码3
% #6 缩放代码4
% 如果 #1 > 0  且 #2 > 0 ，取#3代码
% 如果 #1 > 0  且 #2 <= 0，取#4代码
% 如果 #1 <= 0 且 #2 > 0 ，取#5代码
% 如果 #1 <= 0 且 #2 <= 0，取#6代码
\cs_new:Npn \__cchess_dim_gezero_dispatch:NNnnnn #1#2 #3#4#5#6
  {
    \dim_compare:nNnTF #1 > \c_zero_dim
      {
        \dim_compare:nNnTF #2 > \c_zero_dim
          { #3 } { #4 }
      }
      {
        \dim_compare:nNnTF #2 > \c_zero_dim
          { #5 } { #6 }
      }
  }

% 缩放代码生成函数(分别按高宽、高度、宽度或实际尺寸缩放)
\cs_new:Npn \__cchess_force_size_dispatch:nnnn % both, height, width, none
  {
    % \dim_show:N \l__cchess_manual_width_dim
    \__cchess_dim_gezero_dispatch:NNnnnn \l__cchess_manual_height_dim
      \l__cchess_manual_width_dim
  }

% 构造缩放类型
\cs_new:Npn \__cchess_new_resize_method:nn #1
  {
    \clist_put_right:Nn \g__cchess_resize_method_clist {#1}
    \cs_new:cpn { \__cchess_resize:n {#1} }
  }

% 无缩放
\__cchess_new_resize_method:nn { none } { }

% 按实际参数缩放
\__cchess_new_resize_method:nn { real }
  {
    \__cchess_force_size_dispatch:nnnn
      {% 盒子宽高缩放
        \coffin_resize:Nnn \l__cchess_manual_coffin
                           \l__cchess_manual_width_dim
                           \l__cchess_manual_height_dim
      }
      {% 指定高度为比例缩放
        \coffin_scale:Nnn \l__cchess_manual_coffin
          {
            \dim_ratio:nn { \l__cchess_manual_height_dim }
              { \__cchess_coffin_ht_plus_dp:N \l__cchess_manual_coffin }
          }
          {
            \dim_ratio:nn { \l__cchess_manual_height_dim }
              { \__cchess_coffin_ht_plus_dp:N \l__cchess_manual_coffin }
          }
      }
      {% 指定宽度为比例缩放
        \coffin_scale:Nnn \l__cchess_manual_coffin
          {
            \dim_ratio:nn { \l__cchess_manual_width_dim }
                          { \coffin_wd:N \l__cchess_manual_coffin }
          }
          {
            \dim_ratio:nn { \l__cchess_manual_width_dim }
                          { \coffin_wd:N \l__cchess_manual_coffin }
          }
      }
      {% 实际宽、高比例缩放
        \coffin_scale:Nnn \l__cchess_manual_coffin
                          { \l__cchess_x_scale_tl }
                          { \l__cchess_y_scale_tl }
      }
  }
\msg_new:nnn { cchess } { resize-type } { using~ `#1'~ resize. }

% 笔画设置函数
\cs_new:Npn \__cchess_pieces_stroke:nn #1#2
  {
    \special { pdf:code ~ q ~ #1 } #2 \special { pdf:code ~ Q }
  }
% 笔画构造函数
\cs_new_protected:Npn \__cchess_pieces_stroke_construct:n #1
  {
    \int_case:nn {\l__cchess_charstroke_type_int}
      {
        {1}{ #1 }
        {2}{
          \__cchess_pieces_stroke:nn { 1~Tr~0.25~w~[]~0~d~1~J } {#1}
        }
        {3}{
          \__cchess_pieces_stroke:nn { 2~Tr~0.25~w~[]~0~d~1~J~1~1~1~RG~1~1~1~rg } {#1}
        }
        {4}{
          \__cchess_pieces_stroke:nn { 2~Tr~0.25~w } {#1}
        }
        {5}{
          \__cchess_pieces_stroke:nn { 3 ~ Tr } {#1}
        }
      }
  }
\cs_generate_variant:Nn  \__cchess_pieces_stroke_construct:n { V }
\cs_generate_variant:Nn  \__cchess_pieces_stroke_construct:n { x }

% =============棋子文字设置函数=============
% 设置棋子的文字
% 红棋编码用大写字母，默认：
% K=帅,A=仕,E/B=相,R=车,C=砲,H/N=马,P=兵
% 黑棋编码用小字字母，默认：
% k=将,a=士,e/b=象,r=車,c=炮,h/n=馬,p=卒
% #1 棋子编码
% #2 棋子字符
\cs_new_nopar:Npn \__cchess_piece_char_setup:nn #1#2
  {
    \clist_if_in:NnF \c__cchess_pieces_name_clist { #1 }
      {
        \msg_error:nnx { cchess } { piecename-exists } { #1 }
      }

    \prop_gput:Nnn \c__cchess_board_pieces_alph_name_prop
        { #1 } { #2 }
  }

% key_value选项设计
\keys_define:nn { cchess }
  {
    % 缩放参数
    gridsize .code:n = { \dim_set:Nn \gridsize { #1 }
                         % 棋子尺寸
                         \dim_set:Nn \piecesize
                           {
                             \fp_to_dim:n { \fp_eval:n { \gridsize * 0.9 } }
                           }
                       } ,
    gridsize .initial:n = 10mm ,
    % 棋盘类型
    boardtype .code:n = { \exp_args:NNx \clist_if_in:NnTF \g__cchess_board_list_clist {#1}
                            { \tl_set:Nx \l__cchess_board_type_tl {#1} }
                            { \msg_error:nnx { cchess } { board-exists } {#1} }
                        },
    % 棋盘线线宽
    boardlinewd .code:n = { \dim_set:Nn \l__cchess_board_linewidth_dim {#1}
                            % 九宫线与象位线线宽
                            \dim_gset:Nn \l__cchess_cross_linewidth_dim
                              {
                                \fp_to_dim:n
                                  {
                                    \fp_eval:n { \l__cchess_board_linewidth_dim * 0.50 }
                                  }
                              }
                            % 炮兵位置线与棋盘线间距
                            \dim_gset:Nn \l__cchess_cross_sep_dim
                              {
                                \fp_to_dim:n
                                  {
                                    \fp_eval:n { \l__cchess_board_linewidth_dim * 1.80 }
                                  }
                              }
                          },
    boardlinewd .initial:n = 0.4pt ,

    % 棋盘线颜色
    boardlinecolor  .code:n = { \__cchess_color_select:nn { cchessboardlinecolor } {#1} } ,
    boardlinecolor  .initial:n = black ,
    boardlinecolor* .code:n = { \__cchess_color_select:nnn { cchessboardlinecolor } #1 } ,

    % 棋盘背景图片
    boardbg .tl_set:N  = \l__cchess_board_background_tl ,
    boardbg .initial:n = {} ,

    % 设置棋子字符
    piecechar .code:n    = { \__cchess_piece_char_setup:nn #1 },
    piecechar .initial:n = {K}{\c__cchess_K_tl} ,

    % 字符格式
    piecefont .code:n = { \tl_set:Nn \l__cchess_piece_char_format_tl {#1}
                          \__cchess_calc_piece_box_size:
                        },

    % 边框类型
    piecetype .code:n = { \exp_args:NNx \clist_if_in:NnTF
                            \g__cchess_piece_box_list_clist {#1}
                            { \tl_set:Nx \l__cchess_piece_box_type_tl {#1} }
                            { \msg_error:nnx { cchess } { box-exists } {#1} }
                        },

    % 字符边框线宽
    boxlinewd .dim_set:N = \l__cchess_box_linewidth_dim ,
    boxlinewd .initial:n = 0.4pt ,

    % 边框线颜色
    boxcolor  .code:n    = { \__cchess_color_select:nn { cchesspieceboxcolor } {#1} } ,
    boxcolor  .initial:n = black ,
    boxcolor* .code:n    = { \__cchess_color_select:nnn { cchesspieceboxcolor } #1 } ,
    % 字符颜色
    redpiece  .code:n    = { \__cchess_color_select:nn { cchessredpiececolor } {#1} } ,
    redpiece  .initial:n = red ,
    redpiece* .code:n    = { \__cchess_color_select:nnn { cchessredpiececolor } #1 } ,
    blkpiece  .code:n    = { \__cchess_color_select:nn { cchessblkpiececolor } {#1} } ,
    blkpiece  .initial:n = black ,
    blkpiece* .code:n    = { \__cchess_color_select:nnn { cchessblkpiececolor } #1 } ,

    % 棋子背景底层填充颜色
    lower  .code:n = { \exp_args:Nx \tl_if_empty:nTF {#1}
                         {
                           \__cchess_color_select:nn { lowerbgboxfill }
                             { yellow!70!red }
                           \cs_set_nopar:Npn \__cchess_aux_color_boxfill:
                             { \color_fill:n { yellow!70!red } }
                         }{ \__cchess_color_select:nn { lowerbgboxfill } { #1 }
                           \cs_set_nopar:Npn \__cchess_aux_color_boxfill:
                             { \color_fill:n { #1 } }
                         }
                     } ,
    lower  .initial:n = {} ,

    % 无反色时上层盒子背景填充颜色
    donut  .code:n = { \exp_args:Nx \tl_if_empty:nTF {#1}
                         {
                           \__cchess_color_select:nn { donutboxfill }
                             { yellow!80!black }
                           \cs_set_nopar:Npn \__cchess_aux_color_boxfill:
                             { \color_fill:n { yellow!80!black } }
                         }{ \__cchess_color_select:nn { donutboxfill } { #1 }
                           \cs_set_nopar:Npn \__cchess_aux_color_boxfill:
                             { \color_fill:n { #1 } }
                         }
                     } ,
    donut  .initial:n = {} ,

    % 棋子背景底层填充颜色
    redupper  .code:n = { \exp_args:Nx \tl_if_empty:nTF {#1}
                            {
                              \__cchess_color_select:nn { redupperbgboxfill }
                                { yellow!70!red }
                              \cs_set_nopar:Npn \__cchess_aux_color_boxfill:
                                { \color_fill:n { yellow!70!red } }
                            }{ \__cchess_color_select:nn { redupperbgboxfill } { #1 }
                              \cs_set_nopar:Npn \__cchess_aux_color_boxfill:
                                { \color_fill:n { #1 } }
                            }
                        } ,
    redupper  .initial:n = {} ,

    % 棋子背景底层填充颜色
    blkupper  .code:n = { \exp_args:Nx \tl_if_empty:nTF {#1}
                            {
                              \__cchess_color_select:nn { blkupperbgboxfill }
                                { yellow!70!red }
                              \cs_set_nopar:Npn \__cchess_aux_color_boxfill:
                                { \color_fill:n { yellow!70!red } }
                            }{ \__cchess_color_select:nn { blkupperbgboxfill } { #1 }
                              \cs_set_nopar:Npn \__cchess_aux_color_boxfill:
                                { \color_fill:n { #1 } }
                            }
                        } ,
    blkupper  .initial:n = {} ,

    % 盒子阴影填充颜色
    shadow  .code:n = { \exp_args:Nx \tl_if_empty:nTF {#1}
                          {
                            \__cchess_color_select:nn { shadowboxfill }
                              { black!35!white }
                            \cs_set_nopar:Npn \__cchess_aux_color_boxfill:
                              { \color_fill:n { black!35!white } }
                          }{ \__cchess_color_select:nn { shadowboxfill } { #1 }
                            \cs_set_nopar:Npn \__cchess_aux_color_boxfill:
                              { \color_fill:n { #1 } }
                          }
                       } ,
    shadow  .initial:n = {} ,

    % 笔画参数
    charstroke .choice:,
    charstroke .value_required:n = true,
    charstroke .choices:nn =
      { none, solid, white, bold, invisible }
      { \int_set_eq:NN \l__cchess_charstroke_type_int \l_keys_choice_int },
    charstroke .initial:n = bold,

    unknown .code:n = { \msg_error:nn { cchess } { unknown-option } }
  }
\msg_new:nnn { cchess } { unknown-option }
  { package~ option~ "\l_keys_key_tl"~ is~ unknown. }

\keys_set:nn { cchess }
  {
    piecefont = \kaishu,
    piecetype = ooo,
    boardtype = x+tn,
  }

\ProcessKeysOptions { cchess }

% key_value选项设计(打谱man)
\keys_define:nn { cchess / man }
  {
    % 打谱环境交叉引用标签
    label .tl_gset:N  = \l__cchess_setman_label_tl ,
    label .initial:n = {} ,

    % 每行棋谱步数
    nums .tl_gset:N  = \l__cchess_mans_per_line_int ,
    nums .initial:n = 2 ,

    unknown .code:n = { \msg_error:nn { cchess } { unknown-man-option } }
  }
\msg_new:nnn { cchess } { unknown-man-option }
  { package~ manual~ option~ "\l_keys_key_tl"~ is~ unknown. }

% key_value选项设计(缩放resize)
\keys_define:nn { cchess / resize }
  {
    % 缩放方式
    type    .code:n = { \exp_args:NNx \clist_if_in:NnTF \g__cchess_resize_method_clist {#1}
                            { \tl_set:Nx \l__cchess_resize_method_tl {#1} }
                            { \msg_error:nnx { cchess } { resize-method } {#1} }
                        },
    % 缩放参数
    xscale .tl_set:N  = \l__cchess_x_scale_tl ,
    xscale .initial:n = 1 ,
    yscale .tl_set:N  = \l__cchess_y_scale_tl ,
    yscale .initial:n = 1 ,
    scale  .meta:n    = { xscale = #1 , yscale = #1 } ,
    width  .dim_set:N = \l__cchess_manual_width_dim ,
    height .dim_set:N = \l__cchess_manual_height_dim ,

    unknown .code:n = { \msg_error:nn { cchess } { unknown-resize-option } }
  }
\msg_new:nnn { cchess } { unknown-resize-option }
  { package~ resize~ option~ "\l_keys_key_tl"~ is~ unknown. }

\keys_set:nn { cchess / resize }
  {
    type = none,
  }

% =============判断选项是否存在=============

% 状态记录bool变量
\bool_new:N \g__cchess_is_board_option_bool
\bool_new:N \g__cchess_is_piece_option_bool

% 判断是否有棋盘外观参数
\cs_new:Npn \__cchess_board_option_if_in:n #1
  {
    \bool_set_false:N \g__cchess_is_board_option_bool
    \clist_map_inline:nn { board,gridsize }
      {
        \tl_if_in:nnT { #1 } { ##1 }
          {
            \bool_set_true:N \g__cchess_is_board_option_bool
            \clist_map_break:
          }
      }
  }

% 判断是否有棋子外观参数
\cs_new:Npn \__cchess_piece_option_if_in:n #1
  {
    \bool_set_false:N \g__cchess_is_piece_option_bool
    \clist_map_inline:nn { piece,lower,donut,upper,shadow,box,charstroke }
      {
        \tl_if_in:nnT { #1 } { ##1 }
          {
            \bool_set_true:N \g__cchess_is_piece_option_bool
            \clist_map_break:
          }
      }
  }

% 棋盘参数判断
\prg_set_conditional:Npnn \__cchess_board_option_if_in:n #1 { p, T, F, TF }
  {
    \__cchess_board_option_if_in:n { #1 }

    \bool_if:NTF \g__cchess_is_board_option_bool
      {
        \prg_return_true:
      }{
        \prg_return_false:
      }
  }

% 棋子参数判断
\prg_set_conditional:Npnn \__cchess_piece_option_if_in:n #1 { p, T, F, TF }
  {
    \__cchess_piece_option_if_in:n { #1 }

    \bool_if:NTF \g__cchess_is_piece_option_bool
      {
        \prg_return_true:
      }{
        \prg_return_false:
      }
  }

% 选项设置用户接口
\NewDocumentCommand \cchessset { m }
  {
    \IfNoValueF { #1}
      {
        \keys_set:nn { cchess } { #1 }

        % 有draft参数，需要重构棋子和棋盘
        \tl_if_in:nnT { #1 } { draft }
          {
            % 构建棋盘
            \__cchess_board_construct:
            % 构建红黑各9个棋子
            \__cchess_pieces_construct:
          }

        \bool_if:NF \g__cchess_draft_bool
          {
            % 构建棋盘
            \__cchess_board_option_if_in:nT { #1 }
              {
                \__cchess_board_construct:
              }
            % 构建红黑各9个棋子
            \__cchess_piece_option_if_in:nT { #1 }
              {
                \__cchess_pieces_construct:
              }
          }
      }
  }

% =============创建棋子coffins=============
% 黑白棋子字符颜色及棋子颜色选择
\cs_new:Npn \__cchess_pieces_color_select:n #1
  {
    \regex_match:NnTF \l__capital_regex { #1 }
      {
        \color_set_eq:nn { cchesspiececolor } { cchessredpiececolor }
        \color_set_eq:nn { upperbgboxfill } { redupperbgboxfill }
      }{
        \color_set_eq:nn { cchesspiececolor } { cchessblkpiececolor }
        \color_set_eq:nn { upperbgboxfill } { blkupperbgboxfill }
      }
  }

% 构建棋子盒子容器
\cs_new:Nn \__cchess_pieces_construct:
  {
    \group_begin:
      \prop_map_inline:Nn \c__cchess_board_pieces_alph_name_prop
        {
          % 选择颜色
          \__cchess_pieces_color_select:n { ##1 }
          % 棋子文字
          \tl_gset:Nx \l__cchess_piece_tl { ##2 }

          % 构建棋子盒子容器
          \hcoffin_set:Nn \l__cchess_piece_coffin
            {
              \__cchess_piece_construct:N \l__cchess_piece_tl
            }

          % 缩放棋子盒子容器
          \coffin_resize:Nnn \l__cchess_piece_coffin { \piecesize }{ \piecesize }

          % 保存结果
          \coffin_gset_eq:cN
            { l__cchess_piece_ ##1 _coffin } \l__cchess_piece_coffin
        }
    \group_end:
  }

% 构造带圈字符
% #1 需要处理的字符(串)变量
\cs_new:Npn \__cchess_piece_construct:N #1
  {
    % 按指定颜色和格式构造棋子字符盒子容器
    \hcoffin_gset:Nn \l__cchess_box_coffin
      {
        \bool_if:NTF \g__cchess_draft_bool
          {
            \color_select:n { cchesspiececolor }
            #1
          }{
            \color_select:n { cchesspiececolor }
            \tl_use:N \l__cchess_piece_char_format_tl
            % 笔划处理
            \__cchess_pieces_stroke_construct:n { #1 }
          }
      }

    % 构造构造棋子字符盒子容器边框
    \__cchess_single_box_construct:
  }
% gridsize,boardtype,boardlinewd,boardlinecolor,boardbg,
% piecechar,piecefont,piecetype,boxlinewd,boxcolor,redpiece,blkpiece,
% lower,donut,redupper,blkupper,shadow,charstroke

% 字符盒子及边框组合盒子容器构造函数
\cs_new:Npn \__cchess_single_box_construct:
  {
    \bool_if:NTF \g__cchess_draft_bool
      {
        \coffin_typeset:cnnnn { l__cchess_box_coffin }
          { l } { b } { 0pt } { 0pt }
      }{
        % 绘制字符外框并拼装结果
        \draw_begin:
          \draw_linewidth:n { \l__cchess_box_linewidth_dim }

          \draw_path_scope_begin:
            \__cchess_piece_box_type_c:n { \l__cchess_piece_box_type_tl } { 1.0 }
            \draw_transform_shift:n {\charboxsize / 2.0, \charboxsize / 2.0 }
            \draw_coffin_use:Nnn \l__cchess_box_coffin { hc } { vc }
          \draw_path_scope_end:
        \draw_end:
      }
  }

% =============创建棋子占位coffins=============
  % 缩放空白棋子
\cs_new:Nn \__cchess_board_piece_z_resize:
  {
    \coffin_resize:Nnn \l__cchess_piece_z_coffin { \piecesize } { \piecesize }
  }
% 缩放空白棋子
\__cchess_board_piece_z_resize:

% 将棋子盒子容器布置到棋盘指定位置(用于棋谱和棋盘排版)
% #1 棋子参数
% 棋子参数的形式为{{0,0}{k},{0,1}{K}}，注意需要包含大括号，
% 不同棋子之间用英文逗号分隔
\cs_new:Npn \__cchess_board_piece_pos_construct:n #1
  {
    \hcoffin_gset:Nn \l__cchess_board_pieces_pos_coffin
      {
        \draw_begin:
          % 在四个角布置空白棋子实现占位(用于撑满棋子画布)
          \clist_set:Nn \l_tmpa_clist
            { {0, 0}{z}, {8, 0}{z}, {0, 9}{z}, {8, 9}{z}}
          \clist_map_inline:Nn \l_tmpa_clist
            {
              \__cchess_piece_set_handle:nn ##1
            }

          % 在指定位置布置棋子
          \clist_set:Nn \l_tmpa_clist { #1 }
          \clist_map_inline:Nn \l_tmpa_clist
            {
              \__cchess_piece_set_handle:nn ##1
            }
        \draw_end:
      }
  }

% =============创建棋盘背景coffin=============
% 载入背景图片
\cs_new:Nn \__cchess_board_backgroud_construct:
  {
    \hcoffin_set:Nn \l__cchess_board_background_coffin
      {
        % 如果文件名不为空则载入图片，否则创建一个空盒子容器
        \tl_if_empty:NTF \l__cchess_board_background_tl
          {
            \phantom{a}
          }{
            \includegraphics{\l__cchess_board_background_tl}
          }
      }
  }

% 组装背景图片
\cs_new:Nn \__cchess_board_assemble:
  {
    % 计算棋盘+棋子后的总宽和总高
    \dim_gset:Nn \l_tmpa_dim
      {
        \coffin_wd:N \l__cchess_manual_coffin
      }
    \dim_gset:Nn \l_tmpb_dim
      {
        \__cchess_coffin_ht_plus_dp:N \l__cchess_manual_coffin
      }

    % 放大一个棋子的长度
    \dim_add:Nn \l_tmpa_dim { \piecesize / 2 }
    \dim_add:Nn \l_tmpb_dim { \piecesize / 2 }

    \bool_if:NF \g__cchess_draft_bool
      {
        % 构建背景图片coffin
        \__cchess_board_backgroud_construct:

        % 缩放背景图片coffin
        \coffin_resize:Nnn \l__cchess_board_background_coffin
          { \l_tmpa_dim } { \l_tmpb_dim }
      }

    % 绘制总边框外线
    \hcoffin_set:Nn \l__cchess_tmpa_coffin
      {
        \draw_begin:
          \draw_linewidth:n { \l__cchess_board_linewidth_dim * 2 }
          \draw_path_rectangle:nn
            { 0pt, 0pt } { \l_tmpa_dim * 0.99, \l_tmpb_dim * 0.99 }
          \draw_path_use_clear:n { draw }
        \draw_end:
      }

    % 绘制总边框内线
    \hcoffin_set:Nn \l__cchess_tmpb_coffin
      {
        \draw_begin:
          \draw_linewidth:n { \l__cchess_board_linewidth_dim * 1 }
          \draw_path_rectangle:nn
            { 0pt, 0pt } { \l_tmpa_dim * 0.97, \l_tmpb_dim * 0.97 }
          \draw_path_use_clear:n { draw }
        \draw_end:
      }

    % 拼装结果
    \hcoffin_set:Nn \l__cchess_manual_coffin
      {
        \draw_begin:
          \draw_path_scope_begin:
            \draw_transform_shift:n { \l_tmpa_dim / 2, \l_tmpa_dim / 2 }
            \bool_if:NF \g__cchess_draft_bool
              {
                \draw_coffin_use:Nnn \l__cchess_board_background_coffin { hc } { vc }
              }
            \draw_coffin_use:Nnn \l__cchess_tmpa_coffin { hc } { vc }
            \draw_coffin_use:Nnn \l__cchess_tmpb_coffin { hc } { vc }
            \draw_coffin_use:Nnn \l__cchess_manual_coffin { hc } { vc }
          \draw_path_scope_end:
        \draw_end:
      }

  }

% =============创建棋盘coffins=============
\cs_new:Nn \__cchess_board_construct:
  {
    % 按指定类型创建棋盘
    \hcoffin_set:Nn \l__cchess_board_coffin
      {
        \draw_begin:
          \draw_linewidth:n { \l__cchess_board_linewidth_dim }

          \draw_path_scope_begin:
            \bool_if:NTF \g__cchess_draft_bool
              {
                \__cchess_board_type_c:n { x } { 1.0 } { 1.0 }
              }{
                \__cchess_board_type_c:n { \l__cchess_board_type_tl } { 1.0 } { 1.0 }
              }
          \draw_path_scope_end:
        \draw_end:
      }

    % 计算棋盘总宽和总高
    \dim_gset:Nn \l__cchess_board_width_dim
      {
        \coffin_wd:N \l__cchess_board_coffin
      }
    \dim_gset:Nn \l__cchess_board_height_dim
      {
        \__cchess_coffin_ht_plus_dp:N \l__cchess_board_coffin
      }
  }

% 在正文中排版棋子
\cs_new:Npn \__cchess_getpiece_handle:nn #1#2
  {
    % 构建红黑各9个棋子
    % \__cchess_pieces_construct:

    % 设置指定格式的基字符盒子
    \hbox_set:Nn \l_tmpa_box { #1 å°† }

    % 盒子高度
    \dim_set:Nn \l_tmpa_dim
      {
        \box_ht_plus_dp:N \l_tmpa_box
      }

    % 棋子高度
    \dim_set:Nn \l_tmpb_dim
      {
        \__cchess_coffin_ht_plus_dp:N \l__cchess_piece_K_coffin
      }

    % 缩放棋子
    \coffin_scale:cnn { l__cchess_piece_ #2 _coffin }
      {
        \dim_ratio:nn { \l_tmpa_dim } { \l_tmpb_dim }
      }{
        \dim_ratio:nn { \l_tmpa_dim } { \l_tmpb_dim }
      }

    % 盒子深度
    \dim_set:Nn \l_tmpb_dim { \box_dp:N \l_tmpa_box }

    % 输出盒子(下沉深度距离)
    \coffin_typeset:cnnnn { l__cchess_piece_ #2 _coffin }
        { l } { b } { 0pt } { -\l_tmpb_dim }
  }

% 构建棋盘
\__cchess_board_construct:

% 构建红黑各9个棋子
\__cchess_pieces_construct:

% =============排版棋谱=============
% 棋谱排版
\cs_new:Npn \__cchess_manual_output:n #1
  {
    % 构建棋盘
    % \__cchess_board_construct:

    % 构建红黑各9个棋子
    % \__cchess_pieces_construct:

    % 构建棋子画布盒子容器
    \__cchess_board_piece_pos_construct:n { #1 }

    % 将棋盘与棋子画布居中对齐后进行拼装
    \hcoffin_set:Nn \l__cchess_manual_coffin
      {
        \draw_begin:
          \draw_path_scope_begin:
            \draw_transform_shift:n
              {
                \l__cchess_board_width_dim / 2,
                \l__cchess_board_height_dim / 2
              }
            \draw_coffin_use:Nnn \l__cchess_board_coffin { hc } { vc }
            \draw_coffin_use:Nnn \l__cchess_board_pieces_pos_coffin { hc } { vc }
          \draw_path_scope_end:
        \draw_end:
      }

    % 按指定方式进行缩放
    \__cchess_resize_c:n { \l__cchess_resize_method_tl }

    % 添加背景和外框
    \__cchess_board_assemble:

    % 输出结果
    \coffin_typeset:Nnnnn \l__cchess_manual_coffin
      { l }{ b } { 0pt } { 0pt }
  }

% 排版棋盘
\cs_new:Nn \__cchess_board_output:
  {
    % 创建棋盘
    % \__cchess_board_construct:

    % 是否需要棋子
    \bool_if:NT  \l__cchess_board_pieces_bool
      {
        % 构建红黑各9个棋子
        % \__cchess_pieces_construct:

        % 创建32个棋子画布盒子容器
        \__cchess_board_piece_pos_construct:n
          {
            { {0,0}{R} }, { {1,0}{H} }, { {2,0}{E} }, { {3,0}{A} }, { {4,0}{K} },
            { {5,0}{A} }, { {6,0}{E} }, { {7,0}{H} }, { {8,0}{R} },
            { {1,2}{C} }, { {7,2}{C} },
            { {0,3}{P} }, { {2,3}{P} }, { {4,3}{P} }, { {6,3}{P} }, { {8,3}{P} },
            { {0,9}{r} }, { {1,9}{h} }, { {2,9}{e} }, { {3,9}{a} }, { {4,9}{k} },
            { {5,9}{a} }, { {6,9}{e} }, { {7,9}{h} }, { {8,9}{r} },
            { {1,7}{c} }, { {7,7}{c} },
            { {0,6}{p} }, { {2,6}{p} }, { {4,6}{p} }, { {6,6}{p} }, { {8,6}{p} }
          }
      }

    % 拼装结果
    \hcoffin_set:Nn \l__cchess_manual_coffin
      {
        \draw_begin:
          \draw_path_scope_begin:
            \draw_transform_shift:n
              {
                \l__cchess_board_width_dim / 2,
                \l__cchess_board_height_dim / 2
              }
            \draw_coffin_use:Nnn \l__cchess_board_coffin { hc } { vc }
            \bool_if:NT  \l__cchess_board_pieces_bool
              {
                \draw_coffin_use:Nnn \l__cchess_board_pieces_pos_coffin { hc } { vc }
              }
          \draw_path_scope_end:
        \draw_end:
      }

    % 按指定方式缩放
    \__cchess_resize_c:n { \l__cchess_resize_method_tl }

    % 添加背景和外框
    \__cchess_board_assemble:

    % 输出结果
    \coffin_typeset:Nnnnn \l__cchess_manual_coffin
      { l }{ b } { 0pt } { 0pt }
  }

% 设置正则匹配函数变体函数
\cs_generate_variant:Nn \regex_match:NnT { NV }
\cs_generate_variant:Nn \regex_match:NnF { NV }

% 利用正则匹配和属性表，
% 将字母或数字表示的棋子坐标转换为数字表示
\cs_new:Npn \__cchess_piece_set_handle:nn #1#2
  {
    \clist_set:Nn \l_tmpa_clist { #1 }
    \clist_pop:NN \l_tmpa_clist \l_tmpa_tl
    \clist_pop:NN \l_tmpa_clist \l_tmpb_tl

    % 判断输入合法性
    \clist_if_in:NVF \c__cchess_pos_x_index_clist \l_tmpa_tl
      {
        \msg_error:nnx { cchess } { piecename-exists } { \l_tmpa_tl }
      }
    \clist_if_in:NVF \c__cchess_pos_y_index_clist \l_tmpb_tl
      {
        \msg_error:nnx { cchess } { piecename-exists } { \l_tmpb_tl }
      }
    \clist_if_in:NnF \c__cchess_pieces_name_clist { #2 }
      {
        \msg_error:nnx { cchess } { piecename-exists } { #2 }
      }

    % 转换坐标为数字
    \regex_match:NVT \l__alph_regex \l_tmpa_tl
      {
        \prop_get:NVN \c__cchess_board_pos_alph_num_prop \l_tmpa_tl \l_tmpa_tl
      }

    \regex_match:NVT \l__alph_regex \l_tmpb_tl
      {
        \prop_get:NVN \c__cchess_board_pos_alph_num_prop \l_tmpb_tl \l_tmpb_tl
      }

    % 用数字坐标定位布置棋子
    \__cchess_piece_set:VVn \l_tmpa_tl \l_tmpb_tl { #2 }
  }

% 在指定位置布置棋子
% #1 x方向数字型坐标值(0-8)
% #2 y方向数字型坐标值(0-9)
% #3 棋子名称(单英文字母)
\cs_new:Npn \__cchess_piece_set:nnn #1#2#3
  {
    \draw_path_scope_begin:
      \draw_transform_shift:n { \gridsize * #1, \gridsize * #2 }
      \draw_coffin_use:cnn { l__cchess_piece_ #3 _coffin } { hc } { vc }
    \draw_path_scope_end:
  }
\cs_generate_variant:Nn \__cchess_piece_set:nnn {VV}

% ======================================================
% ===采用棋子替换方式创建棋子画布coffin(用于打谱排版)===
% ======================================================
% 缩放占棋子盒子容器
\cs_new:Nn \__cchess_board_pieces_resize:
  {
    % 空白棋子
    \coffin_resize:Nnn \l__cchess_board_piece_z_coffin
       { \piecesize } { \piecesize }

    % 其它棋子，按行(a-i)列(a-j)编号命名。
    \clist_map_inline:Nn \c__cchess_board_pos_x_clist
      {
        \clist_map_inline:Nn \c__cchess_board_pos_y_clist
          {
            \coffin_resize:cnn { l__cchess_board_piece_ ##1 _ ####1 _coffin }
              { \piecesize } { \piecesize }
          }
      }
  }

% 创建字母行列编号命名棋子的占位棋子画布
\cs_new:Nn \__cchess_board_pieces_seat:
  {
    % 缩放占位棋子
    \__cchess_board_pieces_resize:

    % 利用双重循环创建棋子画布
    \hcoffin_gset:Nn \l__cchess_board_pieces_pos_coffin
    {
      \draw_begin:
        \int_zero:N \l_tmpa_int
        % 扫描a-i横向位置编号列表
        \clist_map_inline:Nn \c__cchess_board_pos_x_clist
          {
            \int_zero:N \l_tmpb_int
            % 扫描a-j纵向位置编号列表
            \clist_map_inline:Nn \c__cchess_board_pos_y_clist
              {
                \draw_path_scope_begin:
                  % 坐标平移
                  \draw_transform_shift:n
                    { \gridsize * \l_tmpa_int, \gridsize * \l_tmpb_int }
                  % 布置棋子
                  \draw_coffin_use:cnn
                    { l__cchess_board_piece_ ##1 _ ####1 _coffin } { hc } { vc }
                \draw_path_scope_end:
                \int_incr:N \l_tmpb_int
              }
            \int_incr:N \l_tmpa_int
          }
      \draw_end:
    }
  }

% 棋子画布棋子替换句柄函数
% 利用正则匹配和属性表，
% 将字母或数字表示的棋子坐标转换为字母表示
\cs_new:Npn \__cchess_piece_replace_handle:nn #1#2
  {
    \clist_set:Nn \l_tmpa_clist { #1 }
    \clist_pop:NN \l_tmpa_clist \l_tmpa_tl
    \clist_pop:NN \l_tmpa_clist \l_tmpb_tl

    % 判断输入合法性
    \clist_if_in:NVF \c__cchess_pos_x_index_clist \l_tmpa_tl
      {
        \msg_error:nnx { cchess } { piecename-exists } { \l_tmpa_tl }
      }
    \clist_if_in:NVF \c__cchess_pos_y_index_clist \l_tmpb_tl
      {
        \msg_error:nnx { cchess } { piecename-exists } { \l_tmpb_tl }
      }
    \clist_if_in:NnF \c__cchess_pieces_name_clist { #2 }
      {
        \msg_error:nnx { cchess } { piecename-exists } { #2 }
      }

    % 转换坐标为字母
    \regex_match:NVT \l__digit_regex \l_tmpa_tl
      {
        \prop_get:NVN \c__cchess_board_pos_num_alph_prop \l_tmpa_tl \l_tmpa_tl
      }

    \regex_match:NVT \l__digit_regex \l_tmpb_tl
      {
        \prop_get:NVN \c__cchess_board_pos_num_alph_prop \l_tmpb_tl \l_tmpb_tl
      }

    % 用字母坐标定位布置棋子
    \__cchess_piece_replace:VVn \l_tmpa_tl \l_tmpb_tl { #2 }
  }

% 棋子占位替换函数
% #1 横向字符型坐标值(a-i)
% #2 纵向字符型坐标值(a-j)
% #3 棋子名称(单英文字母)
\cs_new:Npn \__cchess_piece_replace:nnn #1#2#3
  {
    \coffin_gset_eq:cc
      { l__cchess_board_piece_ #1 _ #2 _coffin }
      { l__cchess_piece_ #3 _coffin }
  }
\cs_generate_variant:Nn \__cchess_piece_replace:nnn {VV}

% 棋子删除句柄函数
% 利用正则匹配和属性表，
% 将字母或数字表示的棋子坐标转换为字母表示
\cs_new:Npn \__cchess_piece_remove_handle:n #1
  {
    \clist_set:Nn \l_tmpa_clist { #1 }
    \clist_pop:NN \l_tmpa_clist \l_tmpa_tl
    \clist_pop:NN \l_tmpa_clist \l_tmpb_tl

    % 判断输入合法性
    \clist_if_in:NVF \c__cchess_pos_x_index_clist \l_tmpa_tl
      {
        \msg_error:nnx { cchess } { piecename-exists } { \l_tmpa_tl }
      }
    \clist_if_in:NVF \c__cchess_pos_y_index_clist \l_tmpb_tl
      {
        \msg_error:nnx { cchess } { piecename-exists } { \l_tmpb_tl }
      }

    % 转换坐标为字母
    \regex_match:NVT \l__digit_regex \l_tmpa_tl
      {
        \prop_get:NVN \c__cchess_board_pos_num_alph_prop \l_tmpa_tl \l_tmpa_tl
      }

    \regex_match:NVT \l__digit_regex \l_tmpb_tl
      {
        \prop_get:NVN \c__cchess_board_pos_num_alph_prop \l_tmpb_tl \l_tmpb_tl
      }

    % 用字母坐标定位布置棋子
    \__cchess_piece_remove:VV \l_tmpa_tl \l_tmpb_tl
  }

% 棋子删除函数
% #1 横向字符型坐标值(a-i)
% #2 纵方向字符型坐标值(a-j)
% #3 棋子名称(单英文字母)
\cs_new:Npn \__cchess_piece_remove:nn #1#2
  {
    \coffin_gset_eq:cN
      { l__cchess_board_piece_ #1 _ #2 _coffin }
      \l__cchess_board_piece_z_coffin
  }
\cs_generate_variant:Nn \__cchess_piece_remove:nn {VV}

% 棋子移动句柄函数
% 利用正则匹配和属性表，
% 将字母或数字表示的棋子坐标转换为字母表示
\cs_new:Npn \__cchess_piece_move_handle:nnn #1#2#3
  {
    \clist_set:Nn \l_tmpa_clist { #2 }
    \clist_pop:NN \l_tmpa_clist \l_tmpa_tl
    \clist_pop:NN \l_tmpa_clist \l_tmpb_tl
    \clist_set:Nn \l_tmpa_clist { #3 }
    \clist_pop:NN \l_tmpa_clist \l_tmpc_tl
    \clist_pop:NN \l_tmpa_clist \l_tmpd_tl

    % 判断输入合法性
    \clist_if_in:NVF \c__cchess_pos_x_index_clist \l_tmpa_tl
      {
        \msg_error:nnx { cchess } { piecename-exists } { \l_tmpa_tl }
      }
    \clist_if_in:NVF \c__cchess_pos_y_index_clist \l_tmpb_tl
      {
        \msg_error:nnx { cchess } { piecename-exists } { \l_tmpb_tl }
      }
    \clist_if_in:NVF \c__cchess_pos_x_index_clist \l_tmpc_tl
      {
        \msg_error:nnx { cchess } { piecename-exists } { \l_tmpc_tl }
      }
    \clist_if_in:NVF \c__cchess_pos_y_index_clist \l_tmpd_tl
      {
        \msg_error:nnx { cchess } { piecename-exists } { \l_tmpd_tl }
      }
    \clist_if_in:NnF \c__cchess_pieces_name_clist { #1 }
      {
        \msg_error:nnx { cchess } { piecename-exists } { #1 }
      }

    % 转换坐标为字母
    \regex_match:NVT \l__digit_regex \l_tmpa_tl
      {
        \prop_get:NVN \c__cchess_board_pos_num_alph_prop \l_tmpa_tl \l_tmpa_tl
      }
    \regex_match:NVT \l__digit_regex \l_tmpb_tl
      {
        \prop_get:NVN \c__cchess_board_pos_num_alph_prop \l_tmpb_tl \l_tmpb_tl
      }
    \regex_match:NVT \l__digit_regex \l_tmpc_tl
      {
        \prop_get:NVN \c__cchess_board_pos_num_alph_prop \l_tmpc_tl \l_tmpc_tl
      }

    \regex_match:NVT \l__digit_regex \l_tmpd_tl
      {
        \prop_get:NVN \c__cchess_board_pos_num_alph_prop \l_tmpd_tl \l_tmpd_tl
      }

    % 用字母坐标定位布置棋子
    \__cchess_piece_move:VVVVn
      \l_tmpa_tl \l_tmpb_tl \l_tmpc_tl \l_tmpd_tl { #1 }
  }

% 棋子移动函数
% #1 原位置横向字符型坐标值(a-i)
% #2 原位置纵向字符型坐标值(a-j)
% #3 新位置横向字符型坐标值(a-i)
% #4 新位置纵向字符型坐标值(a-j)
% #5 棋子名称(单英文字母)
\cs_new:Npn \__cchess_piece_move:nnnnn #1#2#3#4#5
  {
    % 删除原位置棋子
    \__cchess_piece_remove:nn { #1 } { #2 }
    % 在新位置布置棋子
    \__cchess_piece_replace:nnn { #3 } { #4 } { #5 }

    % 生成打谱棋谱记录
    \bool_if:NT \l__cchess_with_setman_bool
      {
        \__cchess_piece_manual_str_construct:nnnnn { #1 }{ #2 }{ #3 }{ #4 }{ #5 }
      }
  }
\cs_generate_variant:Nn \__cchess_piece_move:nnnnn {VVVV}

% 生成打谱棋谱记录
% TODO：暂未实现纵向同类棋子前后判断
% #1 原位置横向字符型坐标值(a-i)
% #2 原位置纵向字符型坐标值(a-j)
% #3 新位置横向字符型坐标值(a-i)
% #4 新位置纵向字符型坐标值(a-j)
% #5 棋子名称(单英文字母)
\cs_new:Npn \__cchess_piece_manual_str_construct:nnnnn #1#2#3#4#5
  {
    % 将字符坐标数据转换为整数坐标
    \prop_get:NnN \c__cchess_board_pos_alph_num_prop { #1 } \l_tmpa_tl
    \prop_get:NnN \c__cchess_board_pos_alph_num_prop { #2 } \l_tmpb_tl
    \prop_get:NnN \c__cchess_board_pos_alph_num_prop { #3 } \l_tmpc_tl
    \prop_get:NnN \c__cchess_board_pos_alph_num_prop { #4 } \l_tmpd_tl
    \int_set:Nn \l_tmpa_int { \l_tmpa_tl }
    \int_set:Nn \l_tmpb_int { \l_tmpb_tl }
    \int_set:Nn \l_tmpc_int { \l_tmpc_tl }
    \int_set:Nn \l_tmpd_int { \l_tmpd_tl }

    % 行棋分析
    \int_compare:nNnTF { \l_tmpc_int } = { \l_tmpa_int }
      { % 纵向移动
        \int_compare:nNnTF { \l_tmpd_int } > { \l_tmpb_int }
          {
            % 坐标向上
            \int_set:Nn \l_tmpe_int { \l_tmpd_int - \l_tmpb_int }
            \tl_set:Nx \l_tmpe_tl { \int_use:N \l_tmpe_int }
            \regex_match:NnTF \l__capital_regex { #5 }
              { % 红棋
                \prop_get:NnN \c__cchess_board_pieces_alph_name_prop { #5 } \l_tmpa_tl
                \prop_get:NnN \c__cchess_board_red_x_idx_prop { #1 } \l_tmpb_tl
                \prop_get:NVN \c__cchess_board_pos_arabic_zh_prop \l_tmpe_tl \l_tmpc_tl
                \clist_put_right:Nx \l__cchess_manual_clist
                  {
                    \l_tmpa_tl
                    \l_tmpb_tl
                    è¿›
                    \l_tmpc_tl
                  }
              }{ % 黑棋
                \prop_get:NnN \c__cchess_board_pieces_alph_name_prop { #5 } \l_tmpa_tl
                \prop_get:NnN \c__cchess_board_black_x_idx_prop { #1 } \l_tmpb_tl
                \clist_put_right:Nx \l__cchess_manual_clist
                  {
                    \l_tmpa_tl
                    \l_tmpb_tl
                    退
                    \int_use:N \l_tmpe_int
                  }
              }
          }{ % 坐标向下
            \int_set:Nn \l_tmpe_int { \l_tmpb_int - \l_tmpd_int }
            \tl_set:Nx \l_tmpe_tl { \int_use:N \l_tmpe_int }
            \regex_match:NnTF \l__capital_regex { #5 }
              { % 红棋
                \prop_get:NnN \c__cchess_board_pieces_alph_name_prop { #5 } \l_tmpa_tl
                \prop_get:NnN \c__cchess_board_red_x_idx_prop { #1 } \l_tmpb_tl
                \prop_get:NVN \c__cchess_board_pos_arabic_zh_prop \l_tmpe_tl \l_tmpc_tl
                \clist_put_right:Nx \l__cchess_manual_clist
                  {
                    \l_tmpa_tl
                    \l_tmpb_tl
                    退
                    \l_tmpc_tl
                  }
              }{ % 黑棋
                \prop_get:NnN \c__cchess_board_pieces_alph_name_prop { #5 } \l_tmpa_tl
                \prop_get:NnN \c__cchess_board_black_x_idx_prop { #1 } \l_tmpb_tl
                \clist_put_right:Nx \l__cchess_manual_clist
                  {
                    \l_tmpa_tl
                    \l_tmpb_tl
                    è¿›
                    \int_use:N \l_tmpe_int
                  }
              }
          }
      }{ % 非纵向移动
        \int_compare:nNnTF { \l_tmpd_int } = { \l_tmpb_int }
          { % 水平移动
            \regex_match:NnTF \l__capital_regex { #5 }
              { % 黑棋
                \prop_get:NnN \c__cchess_board_pieces_alph_name_prop { #5 } \l_tmpa_tl
                \prop_get:NnN \c__cchess_board_red_x_idx_prop { #1 } \l_tmpb_tl
                \prop_get:NnN \c__cchess_board_red_x_idx_prop { #3 } \l_tmpc_tl
                \clist_put_right:Nx \l__cchess_manual_clist
                  {
                    \l_tmpa_tl
                    \l_tmpb_tl
                    å¹³
                    \l_tmpc_tl
                  }
              }{ % 红棋
                \prop_get:NnN \c__cchess_board_pieces_alph_name_prop { #5 } \l_tmpa_tl
                \prop_get:NnN \c__cchess_board_black_x_idx_prop { #1 } \l_tmpb_tl
                \prop_get:NnN \c__cchess_board_black_x_idx_prop { #3 } \l_tmpc_tl
                \clist_put_right:Nx \l__cchess_manual_clist
                  {
                    \l_tmpa_tl
                    \l_tmpb_tl
                    å¹³
                    \l_tmpc_tl
                  }
              }
          }{ % 非纵非横向移动
            \int_compare:nNnTF { \l_tmpd_int } > { \l_tmpb_int }
              { % 纵向向上
                \regex_match:NnTF \l__capital_regex { #5 }
                  { % 红棋
                    \prop_get:NnN \c__cchess_board_pieces_alph_name_prop { #5 } \l_tmpa_tl
                    \prop_get:NnN \c__cchess_board_red_x_idx_prop { #1 } \l_tmpb_tl
                    \prop_get:NnN \c__cchess_board_red_x_idx_prop { #3 } \l_tmpc_tl
                    \clist_put_right:Nx \l__cchess_manual_clist
                      {
                        \l_tmpa_tl
                        \l_tmpb_tl
                        è¿›
                        \l_tmpc_tl
                      }
                  }{ % 黑棋
                    \prop_get:NnN \c__cchess_board_pieces_alph_name_prop { #5 } \l_tmpa_tl
                    \prop_get:NnN \c__cchess_board_black_x_idx_prop { #1 } \l_tmpb_tl
                    \prop_get:NnN \c__cchess_board_black_x_idx_prop { #3 } \l_tmpc_tl
                    \clist_put_right:Nx \l__cchess_manual_clist
                      {
                        \l_tmpa_tl
                        \l_tmpb_tl
                        退
                        \l_tmpc_tl
                      }
                  }
              }{ % 纵向向下
                \regex_match:NnTF \l__capital_regex { #5 }
                  { % 红棋
                    \prop_get:NnN \c__cchess_board_pieces_alph_name_prop { #5 } \l_tmpa_tl
                    \prop_get:NnN \c__cchess_board_red_x_idx_prop { #1 } \l_tmpb_tl
                    \prop_get:NnN \c__cchess_board_red_x_idx_prop { #3 } \l_tmpc_tl
                    \clist_put_right:Nx \l__cchess_manual_clist
                      {
                        \l_tmpa_tl
                        \l_tmpb_tl
                        退
                        \l_tmpc_tl
                      }
                  }{ % 黑棋
                    \prop_get:NnN \c__cchess_board_pieces_alph_name_prop { #5 } \l_tmpa_tl
                    \prop_get:NnN \c__cchess_board_black_x_idx_prop { #1 } \l_tmpb_tl
                    \prop_get:NnN \c__cchess_board_black_x_idx_prop { #3 } \l_tmpc_tl
                    \clist_put_right:Nx \l__cchess_manual_clist
                      {
                        \l_tmpa_tl
                        \l_tmpb_tl
                        è¿›
                        \l_tmpc_tl
                      }
                  }
              }
          }
      }
  }
\cs_generate_variant:Nn \__cchess_piece_manual_str_construct:nnnnn {VVVV}

% 打谱环境前处理函数
% #1 打谱命令
\cs_new:Npn \__cchess_setcchessman_pre_setup:n #1
  {
    % 构建棋盘
    % \__cchess_board_construct:
    % 构建红黑各9个棋子
    % \__cchess_pieces_construct:

    % 删除环境中的代码中的空白
    \tl_set:Nn \l_tmpa_tl { #1 }
    \tl_remove_all:Nn \l_tmpa_tl {~}
    % 执行环境中的代码
    \tl_use:N \l_tmpa_tl
  }

% 定义\label命令的变体函数
%\label { #1 }
\cs_set_eq:NN \__cchess_setman_label:n \label
\cs_generate_variant:Nn \__cchess_setman_label:n { x }

% 打谱环境后处理函数
\cs_new:Nn \__cchess_setcchessman_post_setup:
  {
    % 布置棋子
    \__cchess_board_pieces_seat:

    % 将棋盘与打谱结果盒子容器居中对齐后进行拼装
    \hcoffin_set:Nn \l__cchess_manual_coffin
      {
        \draw_begin:
          \draw_path_scope_begin:
            \draw_transform_shift:n
              {
                \l__cchess_board_width_dim / 2,
                \l__cchess_board_height_dim / 2
              }
            \draw_coffin_use:Nnn \l__cchess_board_coffin { hc } { vc }
            \draw_coffin_use:Nnn \l__cchess_board_pieces_pos_coffin { hc } { vc }
          \draw_path_scope_end:
        \draw_end:
      }

    % 缩放拼装结果
    \__cchess_resize_c:n { \l__cchess_resize_method_tl }

    % 添加背景和外框
    \__cchess_board_assemble:

    % 星号环境需要输出打谱记录
    \bool_if:NT \l__cchess_with_setman_bool
      {
        % 递增计数器
        \refstepcounter{setman}
        % 设置label标签
        \__cchess_setman_label:x { \l__cchess_setman_label_tl }

        % 构造临时文件
        \iow_open:Nn \g_tmpa_iow
          {
            \c_sys_jobname_str\l__cchess_setman_label_tl\thesetman .man
          }

        % 遍历打谱记录列表，输出打谱记录到临时文件
        \bool_until_do:nn { \clist_if_empty_p:N \l__cchess_manual_clist }
          {
            \clist_pop:NN \l__cchess_manual_clist \l_tmpa_tl
            \tl_set:Nx \l_tmpb_tl {\l_tmpa_tl}
            \iow_now:Nx \g_tmpa_iow { \l_tmpb_tl }
          }

        % 关闭文件
        \iow_close:N \g_tmpa_iow
      }

    % 输出结果盒子容器
    \coffin_typeset:Nnnnn \l__cchess_manual_coffin
      { l }{ b } { 0pt } { 0pt }
  }

% 参考雾月的回复：https://ask.latexstudio.net/ask/question/7430.html
% LaTeX3 并未定义 \use_i:nnnnn
\cs_set:Npn \use_i:nnnnn #1#2#3#4#5 {#1}

% 打谱棋谱排版描述处理
\cs_new:Npn \__cchess_setman_print:n #1
  {
    % 根据棋谱label构建文件名
    \cs_if_exist:cTF { r@#1 }
      {
        % 这一步是得到 ref，它保存在 \r@#1 中。
        % \r@#1 有两项，当使用 hyperref 时，
        % \r@#1 有 5 项，这里使用 \empty 统一解决
        \tl_set:Nx \l_tmpa_tl
          {
            \c_sys_jobname_str
            #1 \exp_args:NNc \exp_after:wN \use_i:nnnnn { r@ #1 }
            \c_empty_tl \c_empty_tl \c_empty_tl .man
          }

        % 打开文件读取数据并输出结果
        \ior_open:NnTF \g_tmpb_ior { \l_tmpa_tl }
          {
            % 循环计数
            \int_set:Nn \l_tmpa_int { 1 }
            % 循环读取一行棋谱
            \ior_str_map_variable:NNn \g_tmpb_ior \l_tmpb_str
              {
                % 转换为token
                \tl_set_rescan:Nno \l_tmpb_tl
                  {
                    \char_set_catcode_letter:N \_
                    \char_set_catcode_letter:N :
                  }{ \l_tmpb_str }

                % 输出结果
                \tl_use:N \l_tmpb_tl

                % 根据每行步数确定输出\quad或是\par
                \int_set:Nn \l_tmpb_int
                  {
                    \int_mod:nn { \l_tmpa_int } { \l__cchess_mans_per_line_int }
                  }
                \int_compare:nNnTF { \l_tmpb_int } = { 0 }
                  { \par } { \quad }

                \int_incr:N \l_tmpa_int
              }
          }
          { \msg_error:nnx { cchess } { file-not-found } { \l_tmpa_tl } }

        % 关闭文件
        \iow_close:N \g_tmpa_ior
      }{ \G@refundefinedtrue }% 引用未定义
  }

\endinput