What is the fastest path to checkmate?

ICC tourney 1203 (12 3), Internet Chess Club
yoshi (1727) vs. THE-WARRIOR (1362)

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

(white to move) 1. Nf3 e6 2. d4 d5 3. c4 c6 4. Nc3 Nf6 5. Bg5 Be7 6. e3 Nbd7 7. Bd3 O-O 8. O-O h6 9. Bh4 Nh5 10. Bxe7 Qxe7 11. Ne5 Nxe5 12. dxe5 g6 13. g4 Ng7 14. f4 Rd8 15. Qf3 Qc5 16. cxd5 cxd5 17. Rac1 Qb6 18. b3 Bd7 19. Ne2 Rac8 20. Nd4 a6 21. f5 exf5 22. Rxc8 Rxc8 23. gxf5 g5 24. Qxd5 Rd8 25. Qe4 Re8 26. f6 Bf5 27. Nxf5 Nxf5 28. Rxf5 Kf8 29. Rf3 Rc8 30. Qh7 Rc1+ 31. Kg2 Ke8 32. Qg8+ Kd7 33. Qxf7+ Kc8 34. Qf8+ Kc7 35. f7 Qc6 36. Qd6+ Qxd6 37. exd6+ Kxd6 38. f8=Q+ Kd5 39. Qd8+ Kc5 40. Rf5+ Kc6 41. Be4#

[ Flip the board | Reset | Options… ] Play online chess

 

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

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight

Click here for 36... Kb6.

Black to play

ICC tourney 1203 (12 3), Internet Chess Club
Analysis of JRussell2 (1024) vs. yoshi (1726)

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

(black to move) 1. e4 e6 2. d4 d5 3. Nd2 c5 4. c3 Nc6 5. Bb5 cxd4 6. Bxc6+ bxc6 7. cxd4 Nf6 8. exd5 cxd5 9. Ngf3 Qb6 10. O-O Be7 11. Nb3 Ne4 12. Be3 Ba6 13. Re1 Bb4 14. Bd2 Nxd2 15. Nbxd2 O-O 16. a3 Be7 17. Qb3 Qxb3 18. Nxb3 Rab8 19. Rab1 Rxb3 20. Ne5 Rfb8 21. Nc6 Rb8b7 22. Na5 Bc4 23. Nxb3 Rxb3 24. Rec1 Kf8 25. Rc3 Ke8 26. Rxb3 Bxb3 27. Rc1 Kd7 28. Rc3 Bc4 29. b3 Bb5 30. a4 Bb4 31. Rh3 Be2 32. Rxh7 Bf8 33. Rh8 Ke8 34. f4 Bd1 35. b4 Bxa4 36. Kf2 f6 37. Ke3 Kf7 38. Kd3 Bxb4 39. Ra8 a5 40. Ra7+ Kg6 41. g4 Bb5+ 42. Ke3 a4 43. Rb7 a3 44. Rxb5 a2 45. Rxb4 a1=Q 46. Kd2 Qa5 47. Kc3 Qa3+ 48. Rb3 Qc1+ 49. Kb4 Qxf4

[ Flip the board | Reset | Options… ] Play online chess

 

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

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight