35...b4!
Tabatabaei manages to maintain his advantage with a few accurate moves.
36.Bb2
36.Bxb4?? Rb8 -+
36...Nc6 37. Bd5
A) 37.Nxd4 Re1+ 38.Kg2 Rb1 -+
B) 37.Bxd4 Nxd4 38.Nxd4 Ra8 -/+
37...Rb81 38.Kg2 b3 39.Kg3 Ne7 40.Bc4 Rb4 41.Bd3 Nd5 42.h4 Kg7 43.Re2 Nc3 -+
Tabatabaei manages to maintain his advantage with a few accurate moves.
36.Bb2
36.Bxb4?? Rb8 -+
36...Nc6 37. Bd5
A) 37.Nxd4 Re1+ 38.Kg2 Rb1 -+
B) 37.Bxd4 Nxd4 38.Nxd4 Ra8 -/+
37...Rb81 38.Kg2 b3 39.Kg3 Ne7 40.Bc4 Rb4 41.Bd3 Nd5 42.h4 Kg7 43.Re2 Nc3 -+
12... b6?
A slow continuation which allows White to improve his position with Rad1 and create some tactical threats.
12... h5!
In order to clear the h7-square for his rook and defend against the White's threat on the f7-square.
13. Ne5 Rh7! 14. Rfd1 h4 15. Nf1 b6 =
13. Rad1! O-O
A)13... Bb7 14. d5! Bxd5 15. Bxd5 Nxd5 16. c4 Nf4 17. Qe3 +-
B)13... h5 14. d5! exd5 15. Nd4 +-
14. Rfe1 Re8 15. Ne5 Bf8 16. Nxf5! exf5 17. Bxf7+ Kg7 18. Bxe8 Nxe8 19. Qf3 c6 20. Qg3+ Kf6 21. Qh4+ Kg7 22. Qg5+ 1-0
A slow continuation which allows White to improve his position with Rad1 and create some tactical threats.
12... h5!
In order to clear the h7-square for his rook and defend against the White's threat on the f7-square.
13. Ne5 Rh7! 14. Rfd1 h4 15. Nf1 b6 =
13. Rad1! O-O
A)13... Bb7 14. d5! Bxd5 15. Bxd5 Nxd5 16. c4 Nf4 17. Qe3 +-
B)13... h5 14. d5! exd5 15. Nd4 +-
14. Rfe1 Re8 15. Ne5 Bf8 16. Nxf5! exf5 17. Bxf7+ Kg7 18. Bxe8 Nxe8 19. Qf3 c6 20. Qg3+ Kf6 21. Qh4+ Kg7 22. Qg5+ 1-0
A double-edged position that requires a lot of calculation and precision.
60... Bb3??
60... Qb2+!
The only move to get a draw.
A) 61. Kh1 Rg3
A1) 62. d8=Q Rh3+ 63.Kg1 Rg3+ 64. Kh1 Rg3+ with perpetual check.
A2) 62. Qf1 Rh3+ 63. Qxh3 Qc1+ 64. Kh2 Bxh3 65. Kxh3 Qf4 66. d8=Q Qxf3+ 67. Kh2 Qf2+ with perpetual check.
A3) 62. Be2 Qc3 63. Bh4 Rh3+ 64.Kg2 Rxh4 65. d8=Q Rh2+ 66. Kxh2 Qh3+ 67. Kg1 Qg3+ 68. Kh1 Qh3+ with perpetual check.
B) 61. Be2 Qc3 62. Bf3 Qb2+ =
C) 61. Qe2?? Qc1 62.Bg2 Qf4+ 63. Kh1 Qxf6 -+
61. d8=Q Bxd1 62. Qxd1 Qe3 63. Bxe5 Qf2+ 64. Kh3 Rd8 65. Qxd8 Qxf3+ 66. Bg3 Qh1+ 67. Kg4 Qxe4+ 68. Bf4 Qe2+ 69. Kf5 Qxh5+ 70. Qg5 Qh3+ 71.Kf6 Qc3+ 72. Qe5 1-0
60... Bb3??
60... Qb2+!
The only move to get a draw.
A) 61. Kh1 Rg3
A1) 62. d8=Q Rh3+ 63.Kg1 Rg3+ 64. Kh1 Rg3+ with perpetual check.
A2) 62. Qf1 Rh3+ 63. Qxh3 Qc1+ 64. Kh2 Bxh3 65. Kxh3 Qf4 66. d8=Q Qxf3+ 67. Kh2 Qf2+ with perpetual check.
A3) 62. Be2 Qc3 63. Bh4 Rh3+ 64.Kg2 Rxh4 65. d8=Q Rh2+ 66. Kxh2 Qh3+ 67. Kg1 Qg3+ 68. Kh1 Qh3+ with perpetual check.
B) 61. Be2 Qc3 62. Bf3 Qb2+ =
C) 61. Qe2?? Qc1 62.Bg2 Qf4+ 63. Kh1 Qxf6 -+
61. d8=Q Bxd1 62. Qxd1 Qe3 63. Bxe5 Qf2+ 64. Kh3 Rd8 65. Qxd8 Qxf3+ 66. Bg3 Qh1+ 67. Kg4 Qxe4+ 68. Bf4 Qe2+ 69. Kf5 Qxh5+ 70. Qg5 Qh3+ 71.Kf6 Qc3+ 72. Qe5 1-0
39... Bh6!
39... Nf6 40. Qc2 Nd7 41. Re1 Rxe1 42. Bxe1 Bd4+ 43. Kh1 Nf6 44.
Be2 Ne5 45. Bd2 Qa1+ 46. Nd1=
39... g5 40. Bd3 f4 41. Bf5 Nf8 42. h4+/=
40.f4
After this forcing move, the central e4-pawn can be used effectively by Black.
40... Bg7 41. Nb1 Qa7 42. h3 Nf6 43. Nc3 Ne4 44. Nxe4 fxe4 45. Re1 Qd7 46.Qc2 Qf5 47. Be3 Nh6 48. g3 Qf7 49. Bg2 Nf5 50.Kh2 Bd4
50... h4 51. g4?? (51.Bxe4 hxg3+ 52. Kg2 Nxe3+ 53. Rxe3 Qxf4-+) 51... Nxe3 52. Rxe3 Qxf4+-+
51.Bxd4 Nxd4 52. Qb1 e3 53. Qd3 e2 54. Kg1 h4 55. gxh4 Qxf4 56. Qxg6+ Kf8 57. Qh5 Qg3 58.Qh8+ Kf7 59. Qh5+ Kg7 60. Qg4+ Qxg4 61. hxg4 Nc2 62.Kf2 Nxe1 63.Kxe1 Re3
0-1
39... Nf6 40. Qc2 Nd7 41. Re1 Rxe1 42. Bxe1 Bd4+ 43. Kh1 Nf6 44.
Be2 Ne5 45. Bd2 Qa1+ 46. Nd1=
39... g5 40. Bd3 f4 41. Bf5 Nf8 42. h4+/=
40.f4
After this forcing move, the central e4-pawn can be used effectively by Black.
40... Bg7 41. Nb1 Qa7 42. h3 Nf6 43. Nc3 Ne4 44. Nxe4 fxe4 45. Re1 Qd7 46.Qc2 Qf5 47. Be3 Nh6 48. g3 Qf7 49. Bg2 Nf5 50.Kh2 Bd4
50... h4 51. g4?? (51.Bxe4 hxg3+ 52. Kg2 Nxe3+ 53. Rxe3 Qxf4-+) 51... Nxe3 52. Rxe3 Qxf4+-+
51.Bxd4 Nxd4 52. Qb1 e3 53. Qd3 e2 54. Kg1 h4 55. gxh4 Qxf4 56. Qxg6+ Kf8 57. Qh5 Qg3 58.Qh8+ Kf7 59. Qh5+ Kg7 60. Qg4+ Qxg4 61. hxg4 Nc2 62.Kf2 Nxe1 63.Kxe1 Re3
0-1
32...f4! [32...Kh7?! 33.Ng3 Kg6 34.b4 Ne5 35.Kg2 Nd7 36.Ba7 f4 37.Ne4 Be5 38.Kf1 Kf5 39.Ke2 Ke6 40.b5 axb5 41.axb5 Kd5 42.Kd3 Bh8 43.Kc2 Nc5 44.Nxc5 dxc5 45.b6 Kc6 46.b7 Kxb7 47.Bxc5 Bg7 48.Kd3 Kc6 49.Kc4 Kd7 50.Kd5 h5 51.Bb4 Ba1 52.Bd2 Ke7 53.h4 gxh4 54.Bxf4 Bf6=; 32...d5 33.Ng3 f4 34.Nf5 Kf8 35.Kf1 (35.b4 Ke8 36.b5 axb5 37.axb5 Kd7 38.Kf1 Ke6 39.Nd4+ Bxd4 40.Bxd4 Nd6 41.b6 Kd7³) 35...Ke8 36.Ke2 h5 37.b4 Kd7=]
33.b4 Ne5 [33...Kh7! 34.Kf1 d5! (34...Kg6 35.a5 Ne5 36.Bd4 Kxh5 37.b5 axb5 38.a6 Nc6 39.Bxh8 Kh4 40.Bg7 (40.Kg2 b4 41.Bb2 b3 42.Bc3 h5 43.Bb2 d5 44.Bc3 d4 45.a7 (45.Bxd4 Nxd4 46.a7 b2 47.a8Q b1Q–+) 45...Nxa7 46.Bxd4 Nb5 47.Bh8 Na3 (47...g4?? 48.Bf6#) 48.Be5 Nc4 49.Bd4 b2 50.Bxb2 Nxb2–+) 40...h5 41.Bf8 b4 42.Bxd6 b3 43.Ba3 Kxh3 44.Kg1 h4 45.Bb2 g4 46.Bg7 gxf3 47.Kh1 Kg4 48.Bb2 Kf5–+) ]
34.b5 axb5 35.axb5 [35.a5 b4 36.a6 Nc6 37.a7 Nxa7 38.Bxa7 b3–+]
35...Nxf3+ [35...Kf7! 36.Bc7 Ke7 37.Kg2 Kd7 38.Ba5 Nc4 39.Bb4 Kc7 40.h4 Kb6 41.Kh3 Kxb5 42.Be1 d5 43.hxg5 hxg5 44.Kg4 Ne5+ 45.Kxg5 Nxf3+ 46.Kxf4 Nxe1–+]
36.Kg2 Nd4 37.h4 Kf7 38.hxg5 hxg5 39.Kh3 Kg6 40.Kg4 Nf5?? [40...Ne6! 41.Ba7 Bb2 42.Bb8 Be5 43.b6 Nc5 44.Bc7 Nb7 45.f3 Bd4 46.Nxf4+ gxf4 47.Kxf4 d5–+]
41.Bc7! Bd4? [41...Nh6+ 42.Kf3 Kxh5 43.b6 Bd4 44.b7 Ba7 45.Bxd6 Kg6³]
42.Nxf4+ gxf4 43.b6 Bxf2 [43...Bxf2 44.b7 Ba7 45.Kxf4 Kf6 46.b8Q Bxb8 47.Bxb8 d5 48.Ba7=] ½–½
33.b4 Ne5 [33...Kh7! 34.Kf1 d5! (34...Kg6 35.a5 Ne5 36.Bd4 Kxh5 37.b5 axb5 38.a6 Nc6 39.Bxh8 Kh4 40.Bg7 (40.Kg2 b4 41.Bb2 b3 42.Bc3 h5 43.Bb2 d5 44.Bc3 d4 45.a7 (45.Bxd4 Nxd4 46.a7 b2 47.a8Q b1Q–+) 45...Nxa7 46.Bxd4 Nb5 47.Bh8 Na3 (47...g4?? 48.Bf6#) 48.Be5 Nc4 49.Bd4 b2 50.Bxb2 Nxb2–+) 40...h5 41.Bf8 b4 42.Bxd6 b3 43.Ba3 Kxh3 44.Kg1 h4 45.Bb2 g4 46.Bg7 gxf3 47.Kh1 Kg4 48.Bb2 Kf5–+) ]
34.b5 axb5 35.axb5 [35.a5 b4 36.a6 Nc6 37.a7 Nxa7 38.Bxa7 b3–+]
35...Nxf3+ [35...Kf7! 36.Bc7 Ke7 37.Kg2 Kd7 38.Ba5 Nc4 39.Bb4 Kc7 40.h4 Kb6 41.Kh3 Kxb5 42.Be1 d5 43.hxg5 hxg5 44.Kg4 Ne5+ 45.Kxg5 Nxf3+ 46.Kxf4 Nxe1–+]
36.Kg2 Nd4 37.h4 Kf7 38.hxg5 hxg5 39.Kh3 Kg6 40.Kg4 Nf5?? [40...Ne6! 41.Ba7 Bb2 42.Bb8 Be5 43.b6 Nc5 44.Bc7 Nb7 45.f3 Bd4 46.Nxf4+ gxf4 47.Kxf4 d5–+]
41.Bc7! Bd4? [41...Nh6+ 42.Kf3 Kxh5 43.b6 Bd4 44.b7 Ba7 45.Bxd6 Kg6³]
42.Nxf4+ gxf4 43.b6 Bxf2 [43...Bxf2 44.b7 Ba7 45.Kxf4 Kf6 46.b8Q Bxb8 47.Bxb8 d5 48.Ba7=] ½–½
Unity Chess Strategy Multiple Choice 14
public poll
B: 15.Bf4 – 4
👍👍👍👍👍👍👍 50%
Vincent, Mahathi, Sanjana, Matthew
C: 15.Nd4 – 4
👍👍👍👍👍👍👍 50%
@roshan_sethuraman, @RichardPeng, Michael, Zhenrui
A: 15.Bg5
▫️ 0%
👥 8 people voted so far.
public poll
B: 15.Bf4 – 4
👍👍👍👍👍👍👍 50%
Vincent, Mahathi, Sanjana, Matthew
C: 15.Nd4 – 4
👍👍👍👍👍👍👍 50%
@roshan_sethuraman, @RichardPeng, Michael, Zhenrui
A: 15.Bg5
▫️ 0%
👥 8 people voted so far.
Unity Chess Endgame Multiple Choice 14
public poll
B: 54.d5 – 12
👍👍👍👍👍👍👍 86%
@YaminiG, ., @roshan_sethuraman, Mahathi, Rahul, Michael, @life1222, Zhenrui, Alan, Sanjana, @chessnoob, Matthew
A: 54.Rxh2 – 1
👍 7%
Vincent
C: 54.a3 – 1
👍 7%
@RichardPeng
👥 14 people voted so far.
public poll
B: 54.d5 – 12
👍👍👍👍👍👍👍 86%
@YaminiG, ., @roshan_sethuraman, Mahathi, Rahul, Michael, @life1222, Zhenrui, Alan, Sanjana, @chessnoob, Matthew
A: 54.Rxh2 – 1
👍 7%
Vincent
C: 54.a3 – 1
👍 7%
@RichardPeng
👥 14 people voted so far.
✴️ Today is birthday of André Chéron
French chess Master
▪️ Born: September 25, 1895, Colombes, France
▪️ Died: September 12, 1980, Leysin, Switzerland
. . . . . . . . . . . . .
@unitychess
French chess Master
▪️ Born: September 25, 1895, Colombes, France
▪️ Died: September 12, 1980, Leysin, Switzerland
. . . . . . . . . . . . .
@unitychess