phpcheckmate 是一个用 PHP 编写的棋类框架，可进行棋子移动和验证，并可悔棋。
示例代码：
$game = new Game();
$game->make_move("e2", "e3");
$game->make_move("f7", "f6");
$game->make_move("d2", "d3");
$game->make_move("g7", "g5");
$game->make_move("d1", "h5");
var_dump($game->player_checkmated("black")); //true #Player2 checkmated
var_dump($game->result()); //1 #Game is over
$game->take_back_move(); #Take back last move
var_dump($game->player_checkmated("black")); //false #Player2 NOT checkmated
var_dump($game->result()); // false #Player2 can still move its king
$game->make_move("d1", "h5");
var_dump($game->player_checkmated("black")); //true #Player2 checkmated
