Zaahir Moolla
commit
957c4ddda6
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package DDG::Goodie::FenViewer;
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# ABSTRACT: This instant answer parses a chess position in the Forsyth-Edwards notation,
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# and draws a chessboard on screen representing that position. The current version only
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# parses the current board position (the first field in the FEN format) and does not check
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# that the given position is actually legal.
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use DDG::Goodie;
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use strict;
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use Scalar::Util qw(looks_like_number);
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use Try::Tiny;
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zci answer_type => "fen_viewer";
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zci is_cached => 1;
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name "FenViewer";
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description "This instant answer parses a chess position in the Forsyth-Edwards notation, and draws a chessboard on screen representing that position.";
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primary_example_queries "FEN rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1", "fen rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq e3 0 1";
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category "entertainment";
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topics "gaming";
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code_url "https://github.com/duckduckgo/zeroclickinfo-goodies/blob/master/lib/DDG/Goodie/FENViewer.pm";
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attribution github => ["rouzbeh", "Ali Neishabouri"],
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twitter => "Rou7_beh";
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triggers start => "fen";
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# Parse the FEN string into an array of length 64.
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sub parse_position {
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my ($i) = 0;
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my ($position) = @_;
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$position =~ s/^\s+|\s+$//g;
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my (@cases) = ();
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for (my $char = 0 ; $char < length($position) ; $char++ ) {
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my $fenchar = substr($position, $char, 1);
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if ($fenchar eq ' ') {
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return @cases;
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}
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if (looks_like_number($fenchar)) {
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for ($i = 0; $i < $fenchar; $i++){
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push(@cases, 'e');
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}
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}
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elsif ($fenchar ne '/') {
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push(@cases, $fenchar);
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}
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}
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return @cases;
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}
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# Generate a chessboard as a HTML table.
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sub draw_chessboard_html {
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my (@position) = @_;
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my ($i) = 0;
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my ($j) = 0;
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my ($counter) = 0;
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my (@arr) = ("A".."Z");
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my (%class_dict) = (
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'r' => 'black rook',
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'n' => 'black knight',
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'b' => 'black bishop',
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'q' => 'black queen',
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'k' => 'black king',
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'p' => 'black pawn',
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'e' => 'empty',
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'R' => 'white rook',
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'N' => 'white knight',
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'B' => 'white bishop',
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'Q' => 'white queen',
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'K' => 'white king',
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'P' => 'white pawn',
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);
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my (%unicode_dict) = (
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'r' => '♜',
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'n' => '♞',
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'b' => '♝',
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'q' => '♛',
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'k' => '♚',
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'p' => '♟',
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'e' => '',
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'R' => '♖',
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'N' => '♘',
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'B' => '♗',
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'Q' => '♕',
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'K' => '♔',
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'P' => '♙',
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);
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my ($html_chessboard) = '<div class="zci--fenviewer"><table class="chess_board" cellpadding="0" cellspacing="0">';
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for ($i = 0; $i < 8; $i++){
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# Rows
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$html_chessboard .= '<tr>';
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for ($j = 0; $j < 8; $j++){
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# Columns
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$html_chessboard .= '<td id="'.$arr[$j].(8-$i).'">';
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$html_chessboard .= '<a href="#" class="'.$class_dict{$position[$counter]};
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$html_chessboard .= '">'.$unicode_dict{$position[$counter]}.'</a>';
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$html_chessboard .= '</td>';
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$counter++;
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}
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$html_chessboard .= '</tr>';
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}
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$html_chessboard .= '</table></div>';
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return $html_chessboard;
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}
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# Generate a chessboard in ASCII, with the same format as
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# 'text output from Chess::PGN::EPD
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sub draw_chessboard_ascii {
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my (@position) = @_;
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my ($i) = 0;
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my ($j) = 0;
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my ($counter) = 0;
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my ($ascii_chessboard) = "";
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for ($i = 0; $i < 8; $i++){
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# Rows
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for ($j = 0; $j < 8; $j++){
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# Columns
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if ($position[$counter] ne 'e') {
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# Occupied square
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$ascii_chessboard .= $position[$counter];
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}
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elsif ($j % 2 != $i % 2) {
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# Black square
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$ascii_chessboard .= '-';
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}
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else {
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# White square
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$ascii_chessboard .= ' ';
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}
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$counter++;
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}
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if($counter < 63) {
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$ascii_chessboard .= "\n";
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}
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}
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return $ascii_chessboard;
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}
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handle remainder => sub {
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my ($query) = $_;
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return unless $query;
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my (@pos) = parse_position($query);
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if ($#pos != 63) {
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# The format is wrong, e.g. space in the middle
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return;
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}
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my ($html_out) = '';
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my ($ascii_out) = '';
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try {
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$html_out = draw_chessboard_html(@pos);
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$ascii_out = draw_chessboard_ascii(@pos);
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}
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catch {
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# The format is wrong, e.g. non-existent piece
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return;
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};
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return $ascii_out, html => $html_out;
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};
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1;
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@ -0,0 +1,24 @@
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.zci--answer .zci--fenviewer a {
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color:#333;
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display:block;
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font-size:27px;
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height:40px;
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position:relative;
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text-decoration:none;
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width:40px;
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line-height: 1.5;
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}
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.zci--answer .zci--fenviewer .chess_board { border: 2px solid #333; }
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.zci--answer .zci--fenviewer .chess_board td {
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background:#fff;
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height:40px;
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text-align:center;
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vertical-align:middle;
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width:40px;
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}
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.zci--answer .zci--fenviewer .chess_board tr:nth-child(odd) td:nth-child(even),
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.zci--answer .zci--fenviewer .chess_board tr:nth-child(even) td:nth-child(odd) {
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background-color: #ddd;
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}
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@ -0,0 +1,23 @@
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#!/usr/bin/env perl
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use strict;
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use warnings;
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use Test::More;
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use DDG::Test::Goodie;
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zci answer_type => "fen_viewer";
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zci is_cached => 1;
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ddg_goodie_test(
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[qw( DDG::Goodie::FenViewer )],
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'FEN rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1' => test_zci("rnbqkbnr\npppppppp\n - - - -\n- - - - \n - - - -\n- - - - \nPPPPPPPP\nRNBQKBNR", html => '<div class="zci--fenviewer"><table class="chess_board" cellpadding="0" cellspacing="0"><tr><td id="A8"><a href="#" class="black rook">♜</a></td><td id="B8"><a href="#" class="black knight">♞</a></td><td id="C8"><a href="#" class="black bishop">♝</a></td><td id="D8"><a href="#" class="black queen">♛</a></td><td id="E8"><a href="#" class="black king">♚</a></td><td id="F8"><a href="#" class="black bishop">♝</a></td><td id="G8"><a href="#" class="black knight">♞</a></td><td id="H8"><a href="#" class="black rook">♜</a></td></tr><tr><td id="A7"><a href="#" class="black pawn">♟</a></td><td id="B7"><a href="#" class="black pawn">♟</a></td><td id="C7"><a href="#" class="black pawn">♟</a></td><td id="D7"><a href="#" class="black pawn">♟</a></td><td id="E7"><a href="#" class="black pawn">♟</a></td><td id="F7"><a href="#" class="black pawn">♟</a></td><td id="G7"><a href="#" class="black pawn">♟</a></td><td id="H7"><a href="#" class="black pawn">♟</a></td></tr><tr><td id="A6"><a href="#" class="empty"></a></td><td id="B6"><a href="#" class="empty"></a></td><td id="C6"><a href="#" class="empty"></a></td><td id="D6"><a href="#" class="empty"></a></td><td id="E6"><a href="#" class="empty"></a></td><td id="F6"><a href="#" class="empty"></a></td><td id="G6"><a href="#" class="empty"></a></td><td id="H6"><a href="#" class="empty"></a></td></tr><tr><td id="A5"><a href="#" class="empty"></a></td><td id="B5"><a href="#" class="empty"></a></td><td id="C5"><a href="#" class="empty"></a></td><td id="D5"><a href="#" class="empty"></a></td><td id="E5"><a href="#" class="empty"></a></td><td id="F5"><a href="#" class="empty"></a></td><td id="G5"><a href="#" class="empty"></a></td><td id="H5"><a href="#" class="empty"></a></td></tr><tr><td id="A4"><a href="#" class="empty"></a></td><td id="B4"><a href="#" class="empty"></a></td><td id="C4"><a href="#" class="empty"></a></td><td id="D4"><a href="#" class="empty"></a></td><td id="E4"><a href="#" class="empty"></a></td><td id="F4"><a href="#" class="empty"></a></td><td id="G4"><a href="#" class="empty"></a></td><td id="H4"><a href="#" class="empty"></a></td></tr><tr><td id="A3"><a href="#" class="empty"></a></td><td id="B3"><a href="#" class="empty"></a></td><td id="C3"><a href="#" class="empty"></a></td><td id="D3"><a href="#" class="empty"></a></td><td id="E3"><a href="#" class="empty"></a></td><td id="F3"><a href="#" class="empty"></a></td><td id="G3"><a href="#" class="empty"></a></td><td id="H3"><a href="#" class="empty"></a></td></tr><tr><td id="A2"><a href="#" class="white pawn">♙</a></td><td id="B2"><a href="#" class="white pawn">♙</a></td><td id="C2"><a href="#" class="white pawn">♙</a></td><td id="D2"><a href="#" class="white pawn">♙</a></td><td id="E2"><a href="#" class="white pawn">♙</a></td><td id="F2"><a href="#" class="white pawn">♙</a></td><td id="G2"><a href="#" class="white pawn">♙</a></td><td id="H2"><a href="#" class="white pawn">♙</a></td></tr><tr><td id="A1"><a href="#" class="white rook">♖</a></td><td id="B1"><a href="#" class="white knight">♘</a></td><td id="C1"><a href="#" class="white bishop">♗</a></td><td id="D1"><a href="#" class="white queen">♕</a></td><td id="E1"><a href="#" class="white king">♔</a></td><td id="F1"><a href="#" class="white bishop">♗</a></td><td id="G1"><a href="#" class="white knight">♘</a></td><td id="H1"><a href="#" class="white rook">♖</a></td></tr></table></div>'),
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'fen rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq e3 0 1 ' => test_zci("rnbqkbnr\npppppppp\n - - - -\n- - - - \n - -P- -\n- - - - \nPPPP PPP\nRNBQKBNR", html => '<div class="zci--fenviewer"><table class="chess_board" cellpadding="0" cellspacing="0"><tr><td id="A8"><a href="#" class="black rook">♜</a></td><td id="B8"><a href="#" class="black knight">♞</a></td><td id="C8"><a href="#" class="black bishop">♝</a></td><td id="D8"><a href="#" class="black queen">♛</a></td><td id="E8"><a href="#" class="black king">♚</a></td><td id="F8"><a href="#" class="black bishop">♝</a></td><td id="G8"><a href="#" class="black knight">♞</a></td><td id="H8"><a href="#" class="black rook">♜</a></td></tr><tr><td id="A7"><a href="#" class="black pawn">♟</a></td><td id="B7"><a href="#" class="black pawn">♟</a></td><td id="C7"><a href="#" class="black pawn">♟</a></td><td id="D7"><a href="#" class="black pawn">♟</a></td><td id="E7"><a href="#" class="black pawn">♟</a></td><td id="F7"><a href="#" class="black pawn">♟</a></td><td id="G7"><a href="#" class="black pawn">♟</a></td><td id="H7"><a href="#" class="black pawn">♟</a></td></tr><tr><td id="A6"><a href="#" class="empty"></a></td><td id="B6"><a href="#" class="empty"></a></td><td id="C6"><a href="#" class="empty"></a></td><td id="D6"><a href="#" class="empty"></a></td><td id="E6"><a href="#" class="empty"></a></td><td id="F6"><a href="#" class="empty"></a></td><td id="G6"><a href="#" class="empty"></a></td><td id="H6"><a href="#" class="empty"></a></td></tr><tr><td id="A5"><a href="#" class="empty"></a></td><td id="B5"><a href="#" class="empty"></a></td><td id="C5"><a href="#" class="empty"></a></td><td id="D5"><a href="#" class="empty"></a></td><td id="E5"><a href="#" class="empty"></a></td><td id="F5"><a href="#" class="empty"></a></td><td id="G5"><a href="#" class="empty"></a></td><td id="H5"><a href="#" class="empty"></a></td></tr><tr><td id="A4"><a href="#" class="empty"></a></td><td id="B4"><a href="#" class="empty"></a></td><td id="C4"><a href="#" class="empty"></a></td><td id="D4"><a href="#" class="empty"></a></td><td id="E4"><a href="#" class="white pawn">♙</a></td><td id="F4"><a href="#" class="empty"></a></td><td id="G4"><a href="#" class="empty"></a></td><td id="H4"><a href="#" class="empty"></a></td></tr><tr><td id="A3"><a href="#" class="empty"></a></td><td id="B3"><a href="#" class="empty"></a></td><td id="C3"><a href="#" class="empty"></a></td><td id="D3"><a href="#" class="empty"></a></td><td id="E3"><a href="#" class="empty"></a></td><td id="F3"><a href="#" class="empty"></a></td><td id="G3"><a href="#" class="empty"></a></td><td id="H3"><a href="#" class="empty"></a></td></tr><tr><td id="A2"><a href="#" class="white pawn">♙</a></td><td id="B2"><a href="#" class="white pawn">♙</a></td><td id="C2"><a href="#" class="white pawn">♙</a></td><td id="D2"><a href="#" class="white pawn">♙</a></td><td id="E2"><a href="#" class="empty"></a></td><td id="F2"><a href="#" class="white pawn">♙</a></td><td id="G2"><a href="#" class="white pawn">♙</a></td><td id="H2"><a href="#" class="white pawn">♙</a></td></tr><tr><td id="A1"><a href="#" class="white rook">♖</a></td><td id="B1"><a href="#" class="white knight">♘</a></td><td id="C1"><a href="#" class="white bishop">♗</a></td><td id="D1"><a href="#" class="white queen">♕</a></td><td id="E1"><a href="#" class="white king">♔</a></td><td id="F1"><a href="#" class="white bishop">♗</a></td><td id="G1"><a href="#" class="white knight">♘</a></td><td id="H1"><a href="#" class="white rook">♖</a></td></tr></table></div>'),
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# Two examples from the last world championship
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'fen r1b1r1k1/2qn1ppp/1ppp4/p3p3/P2PP3/R4N1P/1PP2PP1/2BQR1K1 b - - 0 14 ' => test_zci("r-b-r-k-\n- qn-ppp\n ppp - -\np - p - \nP- PP- -\nR - -N-P\n PP- PP-\n- BQR K ", html => '<div class="zci--fenviewer"><table class="chess_board" cellpadding="0" cellspacing="0"><tr><td id="A8"><a href="#" class="black rook">♜</a></td><td id="B8"><a href="#" class="empty"></a></td><td id="C8"><a href="#" class="black bishop">♝</a></td><td id="D8"><a href="#" class="empty"></a></td><td id="E8"><a href="#" class="black rook">♜</a></td><td id="F8"><a href="#" class="empty"></a></td><td id="G8"><a href="#" class="black king">♚</a></td><td id="H8"><a href="#" class="empty"></a></td></tr><tr><td id="A7"><a href="#" class="empty"></a></td><td id="B7"><a href="#" class="empty"></a></td><td id="C7"><a href="#" class="black queen">♛</a></td><td id="D7"><a href="#" class="black knight">♞</a></td><td id="E7"><a href="#" class="empty"></a></td><td id="F7"><a href="#" class="black pawn">♟</a></td><td id="G7"><a href="#" class="black pawn">♟</a></td><td id="H7"><a href="#" class="black pawn">♟</a></td></tr><tr><td id="A6"><a href="#" class="empty"></a></td><td id="B6"><a href="#" class="black pawn">♟</a></td><td id="C6"><a href="#" class="black pawn">♟</a></td><td id="D6"><a href="#" class="black pawn">♟</a></td><td id="E6"><a href="#" class="empty"></a></td><td id="F6"><a href="#" class="empty"></a></td><td id="G6"><a href="#" class="empty"></a></td><td id="H6"><a href="#" class="empty"></a></td></tr><tr><td id="A5"><a href="#" class="black pawn">♟</a></td><td id="B5"><a href="#" class="empty"></a></td><td id="C5"><a href="#" class="empty"></a></td><td id="D5"><a href="#" class="empty"></a></td><td id="E5"><a href="#" class="black pawn">♟</a></td><td id="F5"><a href="#" class="empty"></a></td><td id="G5"><a href="#" class="empty"></a></td><td id="H5"><a href="#" class="empty"></a></td></tr><tr><td id="A4"><a href="#" class="white pawn">♙</a></td><td id="B4"><a href="#" class="empty"></a></td><td id="C4"><a href="#" class="empty"></a></td><td id="D4"><a href="#" class="white pawn">♙</a></td><td id="E4"><a href="#" class="white pawn">♙</a></td><td id="F4"><a href="#" class="empty"></a></td><td id="G4"><a href="#" class="empty"></a></td><td id="H4"><a href="#" class="empty"></a></td></tr><tr><td id="A3"><a href="#" class="white rook">♖</a></td><td id="B3"><a href="#" class="empty"></a></td><td id="C3"><a href="#" class="empty"></a></td><td id="D3"><a href="#" class="empty"></a></td><td id="E3"><a href="#" class="empty"></a></td><td id="F3"><a href="#" class="white knight">♘</a></td><td id="G3"><a href="#" class="empty"></a></td><td id="H3"><a href="#" class="white pawn">♙</a></td></tr><tr><td id="A2"><a href="#" class="empty"></a></td><td id="B2"><a href="#" class="white pawn">♙</a></td><td id="C2"><a href="#" class="white pawn">♙</a></td><td id="D2"><a href="#" class="empty"></a></td><td id="E2"><a href="#" class="empty"></a></td><td id="F2"><a href="#" class="white pawn">♙</a></td><td id="G2"><a href="#" class="white pawn">♙</a></td><td id="H2"><a href="#" class="empty"></a></td></tr><tr><td id="A1"><a href="#" class="empty"></a></td><td id="B1"><a href="#" class="empty"></a></td><td id="C1"><a href="#" class="white bishop">♗</a></td><td id="D1"><a href="#" class="white queen">♕</a></td><td id="E1"><a href="#" class="white rook">♖</a></td><td id="F1"><a href="#" class="empty"></a></td><td id="G1"><a href="#" class="white king">♔</a></td><td id="H1"><a href="#" class="empty"></a></td></tr></table></div>'),
|
||||
'fen 5rk1/4R1p1/3q1p2/p1p2P1p/P3Q2P/5pP1/2P2P1K/8 w - - 0 35' => test_zci(" - - rk-\n- - R p \n - q p -\np p -P-p\nP- -Q- P\n- - -pP \n -P- P K\n- - - - ", html => '<div class="zci--fenviewer"><table class="chess_board" cellpadding="0" cellspacing="0"><tr><td id="A8"><a href="#" class="empty"></a></td><td id="B8"><a href="#" class="empty"></a></td><td id="C8"><a href="#" class="empty"></a></td><td id="D8"><a href="#" class="empty"></a></td><td id="E8"><a href="#" class="empty"></a></td><td id="F8"><a href="#" class="black rook">♜</a></td><td id="G8"><a href="#" class="black king">♚</a></td><td id="H8"><a href="#" class="empty"></a></td></tr><tr><td id="A7"><a href="#" class="empty"></a></td><td id="B7"><a href="#" class="empty"></a></td><td id="C7"><a href="#" class="empty"></a></td><td id="D7"><a href="#" class="empty"></a></td><td id="E7"><a href="#" class="white rook">♖</a></td><td id="F7"><a href="#" class="empty"></a></td><td id="G7"><a href="#" class="black pawn">♟</a></td><td id="H7"><a href="#" class="empty"></a></td></tr><tr><td id="A6"><a href="#" class="empty"></a></td><td id="B6"><a href="#" class="empty"></a></td><td id="C6"><a href="#" class="empty"></a></td><td id="D6"><a href="#" class="black queen">♛</a></td><td id="E6"><a href="#" class="empty"></a></td><td id="F6"><a href="#" class="black pawn">♟</a></td><td id="G6"><a href="#" class="empty"></a></td><td id="H6"><a href="#" class="empty"></a></td></tr><tr><td id="A5"><a href="#" class="black pawn">♟</a></td><td id="B5"><a href="#" class="empty"></a></td><td id="C5"><a href="#" class="black pawn">♟</a></td><td id="D5"><a href="#" class="empty"></a></td><td id="E5"><a href="#" class="empty"></a></td><td id="F5"><a href="#" class="white pawn">♙</a></td><td id="G5"><a href="#" class="empty"></a></td><td id="H5"><a href="#" class="black pawn">♟</a></td></tr><tr><td id="A4"><a href="#" class="white pawn">♙</a></td><td id="B4"><a href="#" class="empty"></a></td><td id="C4"><a href="#" class="empty"></a></td><td id="D4"><a href="#" class="empty"></a></td><td id="E4"><a href="#" class="white queen">♕</a></td><td id="F4"><a href="#" class="empty"></a></td><td id="G4"><a href="#" class="empty"></a></td><td id="H4"><a href="#" class="white pawn">♙</a></td></tr><tr><td id="A3"><a href="#" class="empty"></a></td><td id="B3"><a href="#" class="empty"></a></td><td id="C3"><a href="#" class="empty"></a></td><td id="D3"><a href="#" class="empty"></a></td><td id="E3"><a href="#" class="empty"></a></td><td id="F3"><a href="#" class="black pawn">♟</a></td><td id="G3"><a href="#" class="white pawn">♙</a></td><td id="H3"><a href="#" class="empty"></a></td></tr><tr><td id="A2"><a href="#" class="empty"></a></td><td id="B2"><a href="#" class="empty"></a></td><td id="C2"><a href="#" class="white pawn">♙</a></td><td id="D2"><a href="#" class="empty"></a></td><td id="E2"><a href="#" class="empty"></a></td><td id="F2"><a href="#" class="white pawn">♙</a></td><td id="G2"><a href="#" class="empty"></a></td><td id="H2"><a href="#" class="white king">♔</a></td></tr><tr><td id="A1"><a href="#" class="empty"></a></td><td id="B1"><a href="#" class="empty"></a></td><td id="C1"><a href="#" class="empty"></a></td><td id="D1"><a href="#" class="empty"></a></td><td id="E1"><a href="#" class="empty"></a></td><td id="F1"><a href="#" class="empty"></a></td><td id="G1"><a href="#" class="empty"></a></td><td id="H1"><a href="#" class="empty"></a></td></tr></table></div>'),
|
||||
'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1' => undef,
|
||||
'fen' => undef,
|
||||
'fen ' => undef,
|
||||
);
|
||||
|
||||
done_testing;
|
||||
Loading…
Reference in New Issue