/**
* {@inheritdoc}
*/
public function possibleCapturesBy($color, BoardInterface $board)
{
$moves = [];
$criteria = ['piece_color' => $color];
foreach ($board->getSquaresBy($criteria) as $square) {
$moves = array_merge($moves, $this->possibleCapturesFrom($square->getPosition(), $board));
}
return $moves;
}
/**
* @param BoardInterface $board
* @param int $color
*
* @return int
*/
public static function getKingPosition(BoardInterface $board, $color)
{
$kingSquares = $board->getSquaresBy(['piece_type' => PieceInterface::TYPE_KING, 'piece_color' => $color]);
if (count($kingSquares) !== 1) {
throw new \RuntimeException(sprintf('There should always be one king of a given color on the board, found %d', count($kingSquares)));
}
return reset($kingSquares)->getPosition();
}
