What is the best continuation for Black?

ICC tourney 1394 (12 3), Internet Chess Club
Analysis of tangent (1911) vs. john2001plus (1734)

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

(black to move) 1. d4 Nf6 2. g4 d5 3. h3 c5 4. dxc5 e6 5. Be3 Nbd7 6. Bg2 Bxc5 7. Bxc5 Nxc5 8. Qd4 Qc7 9. Nc3 O-O 10. g5 e5 11. Qh4 Qb6 12. O-O-O d4 13. gxf6 dxc3 14. bxc3 Qxf6 15. Qxf6 gxf6 16. Bd5 Be6 17. Nf3 Bxd5 18. Rxd5 Ne4 19. Rg1+ Kh8 20. Rd7 Nxc3 21. Kd2 Ne4+ 22. Ke3 Nc5 23. Rd6 Ne6 24. Ke4 Rg8 25. Rxg8+ Rxg8 26. Kf5 Rg6 27. Rd7 Ng7+ 28. Ke4 f5+ 29. Kxe5 Re6+ 30. Kf4 Rxe2 31. Ne5 Ne6+ 32. Kxf5 Rxf2+ 33. Kg4 Rxc2 34. Nxf7+ Kg7 35. Nd8+ Kf6 36. Nxb7 Rg2+ 37. Kf3 Rxa2 38. Ke3 Ra3+ 39. Kd2 Rxh3 40. Rd6 Ke5 41. Ra6 Rh2+ 42. Ke3 Rh3+ 43. Kf2 h5 44. Ra5+ Ke4 45. Ra4+ Nd4 46. Nc5+ Kd5 47. Nd7 Rh2+ 48. Kg3 Rh1 49. Rxa7 h4+ 50. Kg2 Rb1 51. Ra5+ Ke4 52. Nf6+ Kd3 53. Rh5 Rb2+ 54. Kh3 Nf3 55. Kg4 Ke3 56. Nd5+ Ke4 57. Nf6+ Ke3 58. Rf5 Rb4+ 59. Kh3 Rb1 60. Nd5+ Ke4 61. Ne7 Rh1+ 62. Kg2 Rg1+ 63. Kf2 h3 64. Rh5 Rg2+ 65. Kf1 Nd2+ 66. Ke1 h2 67. Nd5 Nf3+ 68. Kf1 Rg1+ 69. Kf2 h1=N+ 70. Rxh1 Rxh1 71. Nc3+ Kd3

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Options:
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Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight

White to play and draw

ICC tourney 1394 (12 3), Internet Chess Club
Analysis of tangent (1911) vs. john2001plus (1734)

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

(white to move) 1. d4 Nf6 2. g4 d5 3. h3 c5 4. dxc5 e6 5. Be3 Nbd7 6. Bg2 Bxc5 7. Bxc5 Nxc5 8. Qd4 Qc7 9. Nc3 O-O 10. g5 e5 11. Qh4 Qb6 12. O-O-O d4 13. gxf6 dxc3 14. bxc3 Qxf6 15. Qxf6 gxf6 16. Bd5 Be6 17. Nf3 Bxd5 18. Rxd5 Ne4 19. Rg1+ Kh8 20. Rd7 Nxc3 21. Kd2 Ne4+ 22. Ke3 Nc5 23. Rd6 Ne6 24. Ke4 Rg8 25. Rxg8+ Rxg8 26. Kf5 Rg6 27. Rd7 Ng7+ 28. Ke4 f5+ 29. Kxe5 Re6+ 30. Kf4 Rxe2 31. Ne5 Ne6+ 32. Kxf5 Rxf2+ 33. Kg4 Rxc2 34. Nxf7+ Kg7 35. Nd8+ Kf6 36. Nxb7 Rg2+ 37. Kf3 Rxa2 38. Ke3 Ra3+ 39. Kd2 Rxh3 40. Rd6 Ke5 41. Ra6 Rh2+ 42. Ke3 Rh3+ 43. Kf2 h5 44. Ra5+ Ke4 45. Ra4+ Nd4 46. Nc5+ Kd5 47. Nd7 Rh2+ 48. Kg3 Rh1 49. Rxa7 h4+ 50. Kg2 Rb1 51. Ra5+ Ke4 52. Nf6+ Kd3 53. Rh5 Rb2+ 54. Kh3 Nf3 55. Kg4 Ke3 56. Nd5+ Ke4 57. Nf6+ Ke3 58. Rf5 Rb4+ 59. Kh3 Rb1 60. Nd5+ Ke4 61. Ne7 Rh1+ 62. Kg2 Rg1+ 63. Kf2 h3 64. Rh5 Rg2+ 65. Kf1 Nd2+ 66. Ke1 h2 67. Rh4+ Kf3 68. Nf5 Ne4 69. Nd4+ Kg3 70. Nf5+ Kf3 71. Nd4+ Ke3 72. Nf5+ Kd3 73. Rh3+ Ng3 74. Nxg3 Rxg3 75. Rxh2

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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

Black to play and win.

ICC 30 0 u, Internet Chess Club
Analysis of fiddler (1794) vs. john2001plus (1868)

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

(black to move) 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nf3 Nf6 5. Nc3 Nc6 6. a3 Bf5 7. Bf4 e6 8. e3 Be7 9. Bd3 Bxd3 10. Qxd3 O-O 11. O-O Rc8 12. b4 Nh5 13. Be5 f6 14. Bg3 Qe8 15. Rfc1 Qg6 16. Qxg6 hxg6 17. Ra2 Nxg3 18. hxg3 a6 19. Rac2 Na7 20. Na4 Rxc2 21. Rxc2 Rc8 22. Rxc8+ Nxc8 23. Nc5 Bxc5 24. dxc5 b6 25. Nd4 bxc5 26. bxc5 Kf7 27. Kf1 Ke7 28. Ke2 Kd7 29. Kd3 e5 30. Nb3 Na7 31. f4 Nc6 32. g4 Ke6 33. g3 f5 34. g5 d4 35. e4 fxe4+ 36. Kxe4 d3 37. a4 Na5 38. Nd2 Nb7 39. Nb3 d2 40. Nxd2 Nxc5+ 41. Ke3 Nxa4 42. Nc4 exf4+ 43. gxf4 Kf5 44. Nd6+ Kg4 45. Nc4 Nc3 46. Ne5+ Kf5 47. Kf3 Nd5 48. Nd3 a5 49. Nc5 Nxf4 50. Ne4 a4 51. Nc3 a3 52. Na2 Kxg5 53. Kg3 Kf5 54. Kf3 g5 55. Kg3 g4 56. Nc3 Ne2+ 57. Nxe2 a2 58. Nd4+ Ke4 59. Nb3 Kd5 60. Kxg4 Kc4 61. Na1 Kc3 62. Kg5 Kb2 63. Kg6 Kxa1 64. Kxg7 Kb2

[ 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 and win.

Live Chess, Chess.com
Analysis of bigpawn63 (1490) vs. john2001plus (1872)

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

(black to move) 1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. d4 Nf6 5. Bg5 h6 6. Bh4 g5 7. Bg3 Bd6 8. Ne5 c5 9. c3 cxd4 10. Bb5+ Nbd7 11. Nxd7 Bxd7 12. Bxd7+ Qxd7 13. Bxd6 Qxd6 14. Qxd4 Qe6+ 15. Kd1 Qg4+ 16. Kc2 Qf5+ 17. Kb3 O-O 18. Re1 Rfd8 19. Nd2 Rac8 20. Re5 Qg4 21. Qxa7 Qxg2 22. Rae1 d4 23. Qb6 Qxf2 24. Rf1 Qxd2 25. Qxf6 Rxc3+ 26. bxc3 Qxc3+ 27. Ka4 Ra8+ 28. Kb5 Ra5+ 29. Kb6 Ra6+ 30. Kxb7 Rxf6 31. Rxf6 d3 32. Re8+ Kg7 33. Rd6 Qb4+ 34. Kc7 Qc5+ 35. Kd7 Qa7+ 36. Kc8 Qa8+ 37. Kd7 Qa4+ 38. Ke7 Qa7+ 39. Rd7 Qc5+ 40. Kd8 Qa5+ 41. Ke7 Qxa2

[ 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 mate in 4 moves.

Live Chess, Chess.com
Analysis of john2001plus (1841) vs. Aravindhnath (1443)

8 7 6 5 4 3 2 1 a b c d e f g h +12

(white to move) 1. Nf3 Nc6 2. d4 d5 3. c4 e6 4. Nc3 Nf6 5. Bg5 Bb4 6. e3 Bd7 7. Bd3 h6 8. Bxf6 gxf6 9. O-O Qe7 10. cxd5 Bxc3 11. dxc6 Bxc6 12. bxc3 Rg8 13. e4 O-O-O 14. Rb1 Rg7 15. Qc2 Rdg8 16. g3 f5 17. Ne5 fxe4 18. Nxc6 bxc6 19. Bxe4 Qd6 20. Qa4 f5 21. Bxc6 Kd8 22. Rb8+ Ke7 23. Rxg8 Rxg8 24. Qb4 f4 25. Re1 fxg3 26. fxg3 h5 27. d5 Qxb4 28. cxb4 h4 29. Rxe6+ Kf7 30. Be8+ Kf8 31. Kg2 Rg5 32. Bc6 Rg4 33. Rf6+ Kg7 34. Rf4 Rg5 35. Rxh4 Re5 36. Kf2 Rf5+ 37. Ke2 Re5+ 38. Kd2 Rf5 39. Rg4+ Kh8 40. a4 Rf2+ 41. Kc3 Rxh2 42. Rh4+ Rxh4 43. gxh4 Kg7 44. b5 Kh6 45. a5 Kh5 46. d6 cxd6 47. b6 axb6 48. axb6 Kxh4 49. b7 Kg5 50. b8=Q Kf5 51. Qxd6 Kg5 52. Bf3 Kf5 53. Kd4 Kg5 54. Qe6 Kf4 55. Qg4#

[ 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 and win.

Live Chess, Chess.com
Analysis of Highratingcrusher (1871) vs. Coupra (1965)

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

(white to move) 1. e4 c5 2. Nf3 e6 3. d4 d5 4. exd5 exd5 5. dxc5 Bxc5 6. Bd3 h6 7. O-O Ne7 8. Re1 O-O 9. Nc3 Bg4 10. Bf4 Qb6 11. Bg3 Qc6 12. h3 Bh5 13. Be2 Nd7 14. Nd4 Bxd4 15. Qxd4 Bxe2 16. Rxe2 Rfe8 17. Rae1 Kf8 18. Qh4 Nf5 19. Rxe8+ Rxe8 20. Rxe8+ Kxe8 21. Qf4 Nxg3 22. fxg3 Kf8 23. Kh2 a6 24. Qd4 Nf6 25. Qd3 Qc4 26. Qxc4 dxc4 27. Na4 b5 28. Nc5 a5 29. Nb7 a4 30. Nd6 Nd5 31. Nxb5 Nb4 32. Nc3 Nxc2 33. Nxa4 Nb4 34. Nb6 Nxa2 35. Nxc4 Ke7 36. g4 Ke6 37. Kg3 Kd5 38. Ne3+ Ke5 39. Nf5 Kf6 40. Ne3 Nb4 41. Nd1 g6 42. h4 Ke5 43. Ne3 Kd4 44. Nd1 Kd3 45. Nf2+ Ke3 46. Nd1+ Kd2 47. Nf2 Kc2 48. Ne4 Nd5 49. b4 Nxb4 50. Nd6 f6 51. Nf7 h5 52. gxh5 gxh5 53. Kf4 Nd5+ 54. Ke4 Ne7 55. Nd6 Kd2 56. Nf5 Ng6 57. g3 Ke2 58. Ng7 Kf2 59. Nxh5 Ne7 60. Kf4 Nd5+ 61. Kf5 Kf3 62. Nxf6 Kxg3 63. h5 Kh4 64. h6 Ne7+ 65. Ke6 Kg5 66. h7 Ng6 67. Kf7 Kh6 68. Kg8 Kg5 69. Kg7 Kf5 70. Ne4

[ 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

What is the best continuation for White?

ICC tourney 1386 (12 3), Internet Chess Club
Analysis of tangent (1921) vs. john2001plus (1716)

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

(white to move) 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 b5 5. Bg2 Bb7 6. e4 bxc4 7. Nc3 exd5 8. exd5 d6 9. Nf3 Nbd7 10. O-O Be7 11. Nd2 Nb6 12. Nxc4 Nxc4 13. Qa4+ Qd7 14. Qxc4 a5 15. Re1 Ba6 16. Qa4 Ra7 17. Bf4 O-O 18. Qxd7 Rxd7 19. Rxe7 Rxe7 20. Bxd6 Rd7 21. Bxf8 Kxf8 22. Na4 Rc7 23. d6 Rc8 24. Rc1 c4 25. Bf1 Rd8 26. Bxc4 Bxc4 27. Rxc4 Rxd6 28. Rc5 Ra6 29. Kf1 Ne4 30. Rb5 g6 31. Ke2 f5 32. Rb7 h5 33. f3 Nd6 34. Rc7 Nb5 35. Rc5 Nd4+ 36. Ke3 Ne6 37. Rb5 Nc7 38. Re5 Kf7 39. Kd3 Kf6 40. f4 Ne6 41. Kc4 g5 42. Kb5 Nc7+ 43. Kc4 gxf4 44. gxf4 Ne6 45. Nc5 Rc6 46. Rxe6+ Rxe6 47. Nxe6 Kxe6 48. Kb5 Kd5 49. Kxa5 Ke4 50. b4

[ 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

What is the strongest line for White?

ICC tourney 1350 (12 3), Internet Chess Club
Analysis of john2001plus (1605) vs. tangent (1931)

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

(white to move) 1. Nf3 g6 2. d4 Bg7 3. c4 f5 4. e4 fxe4 5. Ng5 c5 6. dxc5 Nf6 7. Nc3 Qa5 8. Bd2 Qxc5 9. Ngxe4 Qe5 10. Bd3 O-O 11. O-O Nc6 12. Re1 Qc7 13. Rc1 b6 14. Nd5 Qd8 15. Ndxf6+ exf6 16. Nd6 f5 17. c5 h5 18. Nxf5 Rxf5 19. Bxf5 gxf5 20. Qb3+ Kh8 21. Qf7 Ba6 22. Bc3 Qg5 23. cxb6 axb6 24. Re8+ Rxe8 25. Bxg7+ Qxg7 26. Qxh5+ Kg8 27. Qxe8+ Kh7 28. Rc3 Qf6 29. Rh3+ Kg7 30. Qh8+ Kf7 31. Rh7+ Ke6 32. Rh6

[ 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