Black to play and mate in 4 moves.

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JoeKempsey (1250) vs. john2001plus (1778)

1 2 3 4 5 6 7 8 h g f e d c b a +13

(black to move) 1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. d4 Nf6 5. Nc3 Bd6 6. Be2 O-O 7. O-O c6 8. Re1 Re8 9. Bg5 h6 10. Bxf6 Qxf6 11. Qd2 Bg4 12. Rad1 Nd7 13. h3 Bf4 14. Qd3 Bf5 15. Ne4 dxe4 16. Qa3 exf3 17. Bxf3 Bxc2 18. Rxe8+ Rxe8 19. Rf1 Bb8 20. Rc1 Qf4 21. g3 Qxc1+ 22. Kg2 Qd2 23. h4 Qxd4 24. Kh3 Qxf2 25. Bg4 Bf5 26. Qb3 Re2 27. Bxf5 Qxf5+ 28. g4 Rh2#

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Options:
	- allow legal moves only;
	- use short algebraic notation;
movement/animation speed: (slow) (fast)
	- show legal moves;

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight