Mate in 4

Blitz:4'+2, ?
Coffey, John vs. Stockfish 10

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

(white to move) 1. Nf3 Nf6 2. d4 g6 3. c4 Bg7 4. Nc3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 c5 8. Be3 Qa5 9. Qd2 Nc6 10. Rc1 cxd4 11. cxd4 Qxd2+ 12. Kxd2 O-O 13. d5 Rd8 14. Ke1 Na5 15. Bg5 Bd7 16. Bd3 f5 17. e5 Be8 18. d6 Rdc8 19. Kd2 exd6 20. exd6 Bf8 21. Be7 Bxe7 22. dxe7 Rxc1 23. Rxc1 Nc6 24. Re1 Kg7 25. Bc4 Bd7 26. Ne5 Nxe5 27. Rxe5 Kf6 28. Re1 Rc8 29. Bb3 b6 30. Kd3 h6 31. Kd4 Re8 32. Kd5 Rxe7 33. Rxe7 Kxe7 34. Ke5 Be8 35. f4 Bc6 36. g3 b5 37. a3 Be8 38. Ba2 Bf7 39. Bxf7 b4 40. Ba2 Kf8 41. Kf6 g5 42. fxg5 bxa3 43. gxh6 Ke8 44. h7 f4 45. Ke6 Kd8 46. Kd6 Kc8 47. Bd5 Kb8 48. h8=Q#

[ 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

Black to play.

Let's Play!, Chess.com
Analysis of Caissarius (1775) vs. soitgoes317 (1859)

1 2 3 4 5 6 7 8 h g f e d c b a 0

(black to move) 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 O-O 6. f4 c5 7. d5 e6 8. Nf3 exd5 9. exd5 Re8+ 10. Be2 Bf5 11. O-O Ne4 12. Nxe4 Bxe4 13. Bd3 Na6 14. Bxe4 Rxe4 15. Qc2 Qe7 16. a3 Re8 17. Bd2 b5 18. cxb5 Nc7 19. Ng5 Re2 20. Rae1 Nxd5 21. Rxe2 Qxe2 22. Re1 Qxe1+ 23. Bxe1 Rxe1+ 24. Kh2 Nxf4 25. Qf2 Be5 26. Qf3 Ne2+ 27. g3 Bxg3+

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

 

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

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight

Black to play

Let's Play!, Chess.com
Analysis of Caissarius (1775) vs. soitgoes317 (1859)

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

(black to move) 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 O-O 6. f4 c5 7. d5 e6 8. Nf3 exd5 9. exd5 Re8+ 10. Be2 Bf5 11. O-O Ne4 12. Nxe4 Bxe4 13. Bd3 Na6 14. Bxe4 Rxe4 15. Qc2 Qe7 16. a3 Re8 17. Bd2 b5 18. cxb5 Nc7 19. Ng5 Re2 20. Rae1 Nxd5 21. Rxe2 Qxe2 22. Re1 Qxe1+ 23. Bxe1 Rxe1+ 24. Kh2 Nxf4 25. Qf2 Re2 26. Qf3 Be5 27. Kg1 Rxg2+ 28. Kf1 Rxg5 29. Qa8+ Kg7 30. Qxa7 Bd4 31. Ke1 Be3 32. Kd1 Rg1+ 33. Kc2 Rc1+ 34. Kb3 c4+ 35. Kb4 Bxa7

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

 

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

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight

White to play

ICC tourney 1724 (12 3), Internet Chess Club
Ethius (1875) vs. tangent (2010), 720+3

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

(white to move) 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 Bxc5 6. Nf3 Qb6 7. e4 Qc7 8. Bg5 a6 9. Qd2 h6 10. Bxf6 gxf6 11. Be2 b6 12. O-O Be7 13. Rac1 d6 14. Rfd1 Bb7 15. a3 Nd7 16. Nd4 Rc8 17. f4 h5 18. b4 Bf8 19. Kh1 Ke7 20. Re1 Bh6 21. Nd5+ exd5 22. cxd5 Nc5 23. bxc5 bxc5 24. Nf5+ Kf8 25. Rb1 Rd8 26. Qb2 Bc8 27. Qxf6 Rh7 28. Nxh6 Qe7 29. Qxe7+ Kxe7 30. Nf5+ Bxf5 31. exf5 Kf6 32. Bd3 Rhh8 33. Rb6 a5 34. g3 Kg7 35. Kg2 Rb8 36. Rxd6 Rb3 37. f6+ Kh6 38. Bf5 Rxa3 39. Rd7 Ra2+ 40. Kh3 Rf8 41. Ree7

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

 

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

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight