Severe: Bunch of unimplemented rules in the game

[Krzysztof Drzazga]

1. No possibility of castling
2. No beat in passing by a pawn
3. Moves that result in exposing King to check allowed.
4. King can be beaten and the game doesn't finish. Instead, an exception is thrown in next move

[Krzysztof Drzazga]

But overall the game looks pretty cool

[a-omar-git]

He also should flip the positions of the King and Queen for both colors.