What is the best move for Black?

ICC tourney 1276 (12 3), Internet Chess Club
ROWLAND (1418) vs. yoshi (1663)

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

(black to move) 1. e4 e6 2. d4 d5 3. Nd2 c5 4. c3 Nc6 5. exd5 exd5 6. Bb5 cxd4 7. cxd4 Bd6 8. Ne2 Nf6 9. Nf3 O-O 10. O-O Re8 11. Bg5 Bg4 12. Ne5 Bxe2 13. Nxc6 bxc6 14. Bxe2 h6 15. Bxf6 Qxf6 16. Bf3 Rab8 17. Qd2 Rb4 18. Rfd1 Rxd4 19. Qxd4 Re1+ 20. Rxe1 Qxd4 21. b3 Qf4 22. Rac1 Qxh2+ 23. Kf1 Bb4 24. Re8+ Kh7 25. Ke2 Qf4 26. Rc2 Qf5 27. Rxc6 Qb1 28. Bxd5 Qe1+ 29. Kf3 Qxe8 30. Be4+ g6 31. Rc7 a5 32. Bd5 Be7 33. a3 Qd8

[ 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 and win.

ICC tourney 1273 (12 3), Internet Chess Club
Analysis of pawninthegrass (1588) vs. tigeriz (1595)

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

(black to move) 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. e3 d6 6. Nge2 c5 7. O-O Nc6 8. a3 a6 9. Qc2 Rb8 10. b3 Na5 11. d3 Bd7 12. b4 Nc6 13. b5 Na5 14. a4 e5 15. Bb2 Re8 16. h3 Be6 17. Nd5 Nxd5 18. cxd5 Bd7 19. Bc3 Ra8 20. Rfb1 axb5 21. axb5 b6 22. Bxa5 bxa5 23. b6 Qb8 24. Ra3 Qb7 25. d4 Rec8 26. dxc5 Rxc5 27. Rc3 Rac8 28. Qb3 Bf8 29. Rbc1 a4 30. Qb4 Rb5 31. Qxa4 Rxc3 32. Nxc3 Rxb6 33. Qh4 Bf5 34. g4 Bc8 35. Ne4 Be7 36. Rxc8+ Kg7 37. g5 Qxc8 38. Qh6+ Kg8 39. h4 Rb4 40. h5 Rb1+ 41. Kh2 Qf8 42. hxg6 Qxh6+ 43. gxh6 hxg6 44. Nc3 Rb3 45. Ne2 Kh7 46. f4 Kxh6 47. fxe5 dxe5 48. Ng3 Rxe3 49. Ne4 Rd3 50. Nf2 Rd4 51. Kg3 Bd6 52. Be4 f5 53. Bg2 e4+ 54. Kh4 g5+ 55. Kh3 Rxd5 56. Bf1 e3 57. Nd3 f4 58. Kg2 Bc5 59. Kf3 Kg6 60. Be2 Bb6 61. Kg4 Rd8 62. Ne5+ Kf6 63. Nd3 Rd7 64. Ne1 Bd8 65. Nd3 Rd4 66. Kf3 Kf5 67. Kg2 g4 68. Nc5 f3+ 69. Bxf3 gxf3+ 70. Kxf3 Rc4 71. Nd3 Re4 72. Nc5 e2 73. Nxe4 e1=Q

[ 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

Live Chess, Chess.com
NYknight631 (1668) vs. john2001plus (1860)

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 Nf6 5. e5 Nfd7 6. Bd3 Nc6 7. Ne2 cxd4 8. cxd4 Qb6 9. Nf3 Bb4+ 10. Bd2 Bxd2+ 11. Qxd2 f6 12. exf6 Nxf6 13. O-O O-O 14. Nc3 Bd7 15. a3 Na5 16. Na4 Bxa4 17. Qb4 Nb3 18. Qxa4 Nxa1 19. Rxa1 Qxb2 20. Re1 Qc3 21. Re3 Qc1+ 22. Re1 Qc3 23. Re3 Qc1+ 24. Re1 Qc6 25. Qxc6 bxc6 26. Rxe6 Rac8 27. Ne5 c5 28. Rd6 c4 29. Bf5 Rb8 30. Be6+ Kh8 31. Nf7+ Rxf7 32. Bxf7 Rb1# CHECK!

[ 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

White to play and win.

Live Chess, Chess.com
john2001plus (1774) vs. Putz57 (1396)

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

(white to move) 1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. a3 Bb7 5. Nc3 Be7 6. d5 exd5 7. cxd5 O-O 8. e4 d6 9. Bd3 Nbd7 10. Bf4 Nc5 11. Bc2 Ncxe4 12. Bxe4 Nxe4 13. Nxe4 Re8 14. O-O

[ 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

Checkmate!

Live Chess, Chess.com
Analysis of chessnerdbird (1392) vs. john2001plus (1845)

1 2 3 4 5 6 7 8 h g f e d c b a +16

(black to move) 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 f6 7. b4 fxe5 8. dxc5 Qc7 9. Bb5 Bd7 10. O-O e4 11. Nd4 Nf6 12. Bxc6 bxc6 13. Bg5 Qe5 14. Bxf6 gxf6 15. Re1 O-O-O 16. Nd2 Qg5 17. Qa4 Kb7 18. b5 cxb5 19. Rab1 a6 20. c6+ Bxc6 21. Nxc6 Rg8 22. Rxb5+ axb5 23. Qxb5+ Kc7 24. g3 Bd6 25. Nxd8 Rxd8 26. Rb1 Rc8 27. Qb7+ Kd8 28. Qb6+ Ke7 29. Qb7+ Rc7 30. Qb5 e3 31. Nf3 exf2+ 32. Kxf2 Qf5 33. Kg2 Qe4 34. Re1 Qc2+ 35. Re2 Qxc3 36. Qxd5 e5 37. Nxe5 fxe5 38. h4 Qc6 39. Kh3 Qxd5 40. Rxe5+ Qxe5 41. Kh2 Qb2+ 42. Kh3 Qxa3 43. h5 Qxg3#

[ 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