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Fix problem with en passant moves in combination with king in chess

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The parser did not handle fen's like

8/8/7p/5P1k/5pPp/P6K/4r2R/8 b - g3

properly. It reported pawn h4 to g3 as an invalid move. This has now been fixed
This commit is contained in:
Alf Magne Kalleland
2018-06-30 14:03:55 +02:00
parent 0e28c13fef
commit 8761d777fe
2 changed files with 12 additions and 3 deletions
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12
FenParser0x88.php
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@@ -556,6 +556,7 @@ class FenParser0x88
}
}
}
break;
// Sliding pieces
case 0x05:
@@ -922,17 +923,28 @@ class FenParser0x88
$king = $this->cache['king' . $color];
$pieces = $this->cache[$color === 'white' ? 'black' : 'white'];
$enPassantSquare = $this->getEnPassantSquare();
if ($enPassantSquare) {
$enPassantSquare = Board0x88Config::$mapping[$enPassantSquare];
}
for ($i = 0, $len = count($pieces); $i < $len; $i++) {
$piece = $pieces[$i];
switch ($piece['t']) {
case 0x01:
if ($king['s'] === $piece['s'] + 15 || $king['s'] === $piece['s'] + 17) {
if($enPassantSquare === $piece['s'] - 16){
return array($piece['s'], $enPassantSquare);
}
return array($piece['s']);
}
break;
case 0x09:
if ($king['s'] === $piece['s'] - 15 || $king['s'] === $piece['s'] - 17) {
if($enPassantSquare === $piece['s'] + 16){
return array($piece['s'], $enPassantSquare);
}
return array($piece['s']);
}
break;

3
PgnParser.php
View File

@@ -205,9 +205,6 @@ class PgnParser
if (isset($move["from"])) {
$move["n"] = $move["from"] . $move["to"];
#$move["n"] = $move["from"] . $move["to"];
#unset($move["m"]);
unset($move["fen"]);
unset($move["from"]);
unset($move["to"]);