Deep Blue blunder

[PauloSoare]

Sorry, I have not looked at the line, it is not my line, is the author of the message.
The line of Terry is very similar to mine.

Paulo Soares

[PauloSoare]

Greg,
Yes a draw with the move 45. Ra6, but Rybka may have found a win with 45. Qd7.

The forced line is:

45. Qd7 Kg8 46. Ra7 Bf8 47. Qf7 Kh8

I'm leaving for a few hours so will run this position while I'm gone.

[d] 1r3b1k/R4Qp1/1q3p1p/1p1PpP2/1Pp1B3/2P4P/6P1/5K2 w - - 7 5

Terry, I think you can start your analyses from the position below,
because this is the key position.


[Event "IBM Kasparov vs. Deep Blue Rematch"]
[Site "New York, NY USA"]
[Date "1997.05.04"]
[Round "2"]
[White "Deep Blue"]
[Black "Kasparov, Garry"]
[ECO "C93"]
[Result "1-0"]
[FEN "1r3b1k/R4Qp1/3P1p1p/1p2pP2/1Pp5/2P3PP/5qBK/8 b - -"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1
b5 7. Bb3 d6 8. c3 O-O 9. h3 h6 10. d4 Re8 11. Nbd2 Bf8
12. Nf1 Bd7 13. Ng3 Na5 14. Bc2 c5 15. b3 Nc6 16. d5 Ne7
17. Be3 Ng6 18. Qd2 Nh7 19. a4 Nh4 20. Nxh4 Qxh4 21. Qe2
Qd8 22. b4 Qc7 23. Rec1 c4 24. Ra3 Rec8 25. Rca1 Qd8 26. f4
Nf6 27. fxe5 dxe5 28. Qf1 Ne8 29. Qf2 Nd6 30. Bb6 Qe8
31. R3a2 Be7 32. Bc5 Bf8 33. Nf5 Bxf5 34. exf5 f6 35. Bxd6
Bxd6 36. axb5 axb5 37. Be4 Rxa2 38. Qxa2 Qd7 39. Qa7 Rc7
40. Qb6 Rb7 41. Ra8+ Kf7 42. Qa6 Qc7 43. Qc6 Qb6+ 44. Kf1
Rb8 45. Qd7+ Kg8 46. Ra7 Bf8 47. Qf7+ Kh8 48. d6 Qe3
49. Bd5 Qc1+ 50. Kf2 Qd2+ 51. Kg1 Qe3+ 52. Kh2 Qf4+ 53. g3
Qf2+ 54. Bg2

[d]1r3b1k/R4Qp1/3P1p1p/1p2pP2/1Pp5/2P3PP/5qBK/8 b - -

[TSP]

Paul,

I'll check your position out as well.

Here is the analysis of my previously posted position.

[d] 1r3b1k/R4Qp1/1q3p1p/1p1PpP2/1Pp1B3/2P4P/6P1/5K2 w - - 7 5

Rybka 3:
20 00:00 357 21.504 +1.65 Kf1e2 Qb6d6 Qf7e6 Qd6b6 Qe6xb6 Rb8xb6 Ke2e3 Kh8g8 Be4f3 e5e4 Bf3xe4 Bf8d6 Be4f3
21 00:00 33.847 200.342 +1.65 Kf1e2 Qb6d6 Qf7e6 Qd6b6 Qe6xb6 Rb8xb6 Ke2e3 Kh8g8 Be4f3 e5e4 Bf3xe4 Bf8d6 Be4f3
22 02:15 27.390.432 207.706 +1.80 Kf1e2 Qb6d6 Qf7e6 Qd6b6 Qe6xb6
23 04:41 55.205.226 200.824 +1.88 Kf1e2 Qb6d6 Qf7e6 Qd6b6 Qe6xb6
24 16:11 184.331.642 194.299 +1.83 Kf1e2 Rb8d8 Qf7b7 Rd8d6
25 21:52 254.768.820 198.772 +1.83 Kf1e2 Rb8d8 Qf7b7 Rd8b8 Qb7xb6 Rb8xb6 Ke2e3 Kh8g8 Be4f3 e5e4 Ke3xe4 Bf8d6 Bf3h5 Rb6b8 Ke4e3 g7g5 f5xg6/ep Rb8e8+ Ke3f2 Re8e5 Bh5f3 Re5e7
26 40:33 471.641.626 198.479 +1.87 Kf1e2 Rb8d8 Qf7b7 Rd8b8 Qb7xb6 Rb8xb6 Ke2e3 Rb6b8 Be4f3 e5e4 Bf3xe4 Bf8d6 Be4f3 Rb8d8 Ra7a5 Rd8b8 Ke3d2 Kh8g8 Kd2c2 Bd6e5 Bf3h5 Kg8f8 Ra5a7 Rb8d8
27 1:23:45 976.778.506 199.004 +1.98 Kf1e2 Rb8d8 Qf7b7 Rd8b8 Qb7xb6
28 2:31:11 1.814.131.105 204.763 +1.98 Kf1e2 Rb8d8 Qf7b7 Rd8b8 Qb7xb6
29 5:14:06 3.624.200,640 196.904 +2.13 Kf1e2 Rb8d8 Qf7b7 Rd8b8 Qb7xb6 Rb8xb6

Rybka likes white's position, but is it a win?

Position after analysis.

[d] 5b1k/R5p1/1r3p1p/1p1PpP2/1Pp1B3/2P4P/4K1P1/8 w - -

[TSP]

Paul,

My line at 29 ply remained a 2.14 evaluation and frankly is looking draw-ish.

Here is the overnight evaluation on your position.

I haven't had a chance to analyze it yet. But the evaluation is the highest I've seen for white in the Kf1 line.

[d] 1r3b1k/R4Qp1/3P1p1p/1p2pP2/1Pp5/2P3PP/5qBK/8 b - - 0 1

Rybka 3:
2 00:00 377 386.048 -0.22 Qf2d2
3 00:00 1.168 1.196.032 -0.29 Qf2b6
4 00:00 2.019 64.608 -0.41 Rb8d8 Ra7c7
5 00:00 4.900 106.757 -1.13 Rb8d8 Ra7c7
6 00:00 8.878 144.302 -0.95 Qf2b6 Kh2h1 e5e4
7+ 00:00 14.049 182.103 -0.75 Qf2b6
7 00:00 27.684 201.052 -1.44 Qf2b6 Ra7c7 e5e4 Bg2xe4 Qb6e3 Be4d5 Qe3e2+ Bd5g2 Qe2e5 Rc7c5
8 00:00 36.415 198.345 -1.44 Qf2b6 Ra7c7 e5e4 Bg2xe4 Qb6e3 Be4d5 Qe3e2+ Bd5g2 Qe2e5 Rc7c5
9+ 00:00 48.474 226.654 -1.24 Qf2b6
9 00:00 74.052 231.186 -1.42 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 Bd6e5 Rb7xb5 Be5xc3
10 00:00 87.557 229.305 -1.42 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 Bd6e5 Rb7xb5 Be5xc3
11+ 00:01 223.502 248.497 -1.22 Rb8d8 Qf7c7 Rd8xd6
11 00:01 321.958 245.666 -1.79 Rb8d8 Ra7c7 Qf2b6 Rc7c6
12+ 00:02 446.228 248.200 -1.59 Qf2b6
12 00:02 501.173 245.433 -2.13 Qf2b6 Kh2h1 e5e4
13+ 00:03 791.468 230.835 -1.93 Qf2b6 Kh2h1
13+ 00:04 829.004 235.543 -1.53 Qf2b6 Kh2h1
13 00:05 1.255.613 247.497 -1.79 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 Kh8g8 Rb7d7 Bd6e7 Bd5c6 Kg8f8 Bc6xb5 Re8b8 Bb5a6 Rb8d8 Rd7c7 Rd8d2+ Kh2g1
14 00:05 1.255.621 247.498 -1.79 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 Kh8g8 Rb7d7 Bd6e7 Bd5c6 Kg8f8 Bc6xb5 Re8b8 Bb5a6 Rb8d8 Rd7c7 Rd8d2+ Kh2g1
15 00:07 1.685.524 248.056 -1.79 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 Kh8g8 Rb7d7 Bd6e7 Bd5c6 Kg8f8 Bc6xb5 Re8b8 Bb5a6 Rb8d8 Rd7c7 Rd8d2+ Kh2g1
16+ 00:09 2.216.457 259.329 -1.59 Qf2b6
16 00:09 2.335.650 255.934 -1.59 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 Kh8g8 Rb7d7 Bd6e7 Bd5c6 Kg8f8 Bc6xb5 Re8b8 Bb5a6 Rb8a8 Ba6xc4 Ra8c8 Bc4d3 Rc8xc3 b4b5 Rc3b3
17 00:27 6.519.146 246.778 -1.72 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 g7g5 Rb7b6 Bd6c7 Rb6xb5 Kh8g7 Bd5xc4 Kg7f8 Rb5c5 Bc7e5 b4b5 Re8b8 Bc4d5 Kf8e7 c3c4 Rb8b6
18 00:29 7.097.980 251.568 -1.72 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 g7g5 Rb7b6 Bd6c7 Rb6xb5 Kh8g7 Bd5xc4 Kg7f8 Rb5c5 Bc7e5 b4b5 Re8b8 Bc4d5 Kf8e7 c3c4 Rb8b6
19 00:40 10.014.678 255.386 -1.72 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 g7g5 Rb7b6 Bd6c7 Rb6xb5 Kh8g7 Bd5xc4 Kg7f8 Rb5c5 Bc7e5 b4b5 Re8b8 Bc4d5 Kf8e7 c3c4 Rb8b6
20 01:15 19.638.482 268.614 -1.62 Qf2b6 Ra7c7 e5e4 Bg2xe4 Qb6e3 Be4d5 Qe3e2+
21 01:31 24.210.884 272.358 -1.62 Qf2b6 Ra7c7 e5e4 Bg2xe4 Qb6e3 Be4d5 Qe3e2+
22 04:19 66.562.734 263.078 -1.79 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 g7g5 Rb7b6 Bd6c7 Rb6xb5 Kh8g7 Bd5xc4 Kg7f8 Rb5c5 Bc7e5 b4b5 Re8b8 Bc4d5 Kf8e7 c3c4 h6h5
23 14:32 210.028.917 246.648 -2.19 Qf2b6 Ra7d7 e5e4 Bg2xe4 Qb6e3 Be4g2 Qe3xc3 Rd7b7 Rb8xb7 Qf7xf8+ Kh8h7 Bg2xb7 Qc3xb4 h3h4 Qb4e1 Qf8e7 Qe1d2+ Kh2h3 c4c3 d6d7 c3c2 d7d8Q c2c1Q Qd8xd2 Qc1xd2 Bb7f3 Qd2d3 Kh3g2 Qd3b3 Qe7e6 Qb3b2+
24 23:17 349.769.292 256.302 -2.28 Qf2b6 Ra7d7 e5e4 Bg2xe4 Qb6e3 Be4g2 Qe3xc3 Rd7b7 Rb8xb7 Qf7xf8+ Kh8h7 Bg2xb7 Qc3xb4 h3h4 Qb4e1 Qf8e7 Qe1f2+ Bb7g2 c4c3 d6d7 c3c2 d7d8Q c2c1Q Qe7e4 Qc1e1 Qe4xe1 Qf2xe1 Qd8d3 b5b4 Bg2d5 Qe1f2+
25 35:18 537.618.871 259.929 -2.28 Qf2b6 Ra7d7 e5e4 Bg2xe4 Qb6e3 Be4g2 Qe3xc3 Rd7b7 Rb8xb7 Qf7xf8+ Kh8h7 Bg2xb7 Qc3xb4 h3h4 Qb4e1 Qf8e7 Qe1f2+ Bb7g2 c4c3 d6d7 c3c2 d7d8Q c2c1Q Qe7e4 Qc1e1 Qe4xe1 Qf2xe1 Qd8d3 b5b4 Bg2d5 Qe1f2+
26 1:46:45 1.678.309.723 268.297 -2.47 Qf2b6 Ra7d7 e5e4 Bg2xe4 Qb6e3 Be4g2 Qe3xc3 Rd7b7 Rb8xb7 Qf7xf8+ Kh8h7 Bg2xb7 Qc3xb4 h3h4 Qb4e1 Qf8e7 Qe1f2+ Bb7g2 c4c3 d6d7 c3c2 d7d8Q c2c1Q Qe7e4 Qc1e1 Qe4xe1 Qf2xe1 Qd8d3 b5b4 Bg2d5 Qe1f2+
27 8:07:19 7.423.225,215 259.955 -2.76 Qf2b6 Ra7d7 e5e4 Bg2xe4 Qb6f2+ Be4g2 Rb8a8 Qf7d5 Ra8e8 Rd7f7 Kh8h7 Rf7xf6 Re8e1 h3h4 g7xf6 d6d7 Qf2g1+ Kh2h3 Re1d1 d7d8Q Rd1xd5 Qd8xd5 Qg1e1 Qd5xb5 Bf8d6 Qb5d7+ Qe1e7 Qd7c6 Bd6e5 Qc6xc4 Qe7d7
28 11:10:18 10.311.734,814 262.531 -2.76 Qf2b6 Ra7d7 e5e4 Bg2xe4 Qb6f2+ Be4g2 Rb8a8 Qf7d5 Ra8e8 Rd7f7 Kh8h7 Rf7xf6 Re8e1 h3h4 g7xf6 d6d7 Qf2g1+ Kh2h3 Re1d1 d7d8Q Rd1xd5 Qd8xd5 Qg1e1 Qd5xb5 Bf8d6 Qb5d7+ Qe1e7 Qd7c6 Bd6e5 Qc6xc4 Qe7d7

[TSP]

Using Rybka to analyze each move in the line for several minutes, sometimes half hour, the line stayed remarkably in tack. Reaching the following position.

What do your engines say?


[d] 8/4q2k/2Qb1p1p/5P2/1Pp4P/2P3PK/6B1/8 b - - 8 15

Rybka 3:

26 36:26 518.654.675 242.923 -3.16 Bd6e5 Qc6xc4 Qe7d7 Qc4g4 Qd7f7 c3c4 Qf7g8 b4b5 Qg8xg4+ Kh3xg4 Be5d6 b5b6 Kh7g7 b6b7 Bd6b8 c4c5 Bb8c7 Bg2f1 Bc7b8 Bf1c4 Kg7h7 Bc4b3 Kh7g7 Bb3d5 Bb8c7

Looks like a win for white to me!

[PauloSoare]

Paul,

My line at 29 ply remained a 2.14 evaluation and frankly is looking draw-ish.

Here is the overnight evaluation on your position.

I haven't had a chance to analyze it yet. But the evaluation is the highest I've seen for white in the Kf1 line.

[d] 1r3b1k/R4Qp1/3P1p1p/1p2pP2/1Pp5/2P3PP/5qBK/8 b - - 0 1

Rybka 3:
2 00:00 377 386.048 -0.22 Qf2d2
3 00:00 1.168 1.196.032 -0.29 Qf2b6
4 00:00 2.019 64.608 -0.41 Rb8d8 Ra7c7
5 00:00 4.900 106.757 -1.13 Rb8d8 Ra7c7
6 00:00 8.878 144.302 -0.95 Qf2b6 Kh2h1 e5e4
7+ 00:00 14.049 182.103 -0.75 Qf2b6
7 00:00 27.684 201.052 -1.44 Qf2b6 Ra7c7 e5e4 Bg2xe4 Qb6e3 Be4d5 Qe3e2+ Bd5g2 Qe2e5 Rc7c5
8 00:00 36.415 198.345 -1.44 Qf2b6 Ra7c7 e5e4 Bg2xe4 Qb6e3 Be4d5 Qe3e2+ Bd5g2 Qe2e5 Rc7c5
9+ 00:00 48.474 226.654 -1.24 Qf2b6
9 00:00 74.052 231.186 -1.42 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 Bd6e5 Rb7xb5 Be5xc3
10 00:00 87.557 229.305 -1.42 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 Bd6e5 Rb7xb5 Be5xc3
11+ 00:01 223.502 248.497 -1.22 Rb8d8 Qf7c7 Rd8xd6
11 00:01 321.958 245.666 -1.79 Rb8d8 Ra7c7 Qf2b6 Rc7c6
12+ 00:02 446.228 248.200 -1.59 Qf2b6
12 00:02 501.173 245.433 -2.13 Qf2b6 Kh2h1 e5e4
13+ 00:03 791.468 230.835 -1.93 Qf2b6 Kh2h1
13+ 00:04 829.004 235.543 -1.53 Qf2b6 Kh2h1
13 00:05 1.255.613 247.497 -1.79 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 Kh8g8 Rb7d7 Bd6e7 Bd5c6 Kg8f8 Bc6xb5 Re8b8 Bb5a6 Rb8d8 Rd7c7 Rd8d2+ Kh2g1
14 00:05 1.255.621 247.498 -1.79 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 Kh8g8 Rb7d7 Bd6e7 Bd5c6 Kg8f8 Bc6xb5 Re8b8 Bb5a6 Rb8d8 Rd7c7 Rd8d2+ Kh2g1
15 00:07 1.685.524 248.056 -1.79 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 Kh8g8 Rb7d7 Bd6e7 Bd5c6 Kg8f8 Bc6xb5 Re8b8 Bb5a6 Rb8d8 Rd7c7 Rd8d2+ Kh2g1
16+ 00:09 2.216.457 259.329 -1.59 Qf2b6
16 00:09 2.335.650 255.934 -1.59 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 Kh8g8 Rb7d7 Bd6e7 Bd5c6 Kg8f8 Bc6xb5 Re8b8 Bb5a6 Rb8a8 Ba6xc4 Ra8c8 Bc4d3 Rc8xc3 b4b5 Rc3b3
17 00:27 6.519.146 246.778 -1.72 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 g7g5 Rb7b6 Bd6c7 Rb6xb5 Kh8g7 Bd5xc4 Kg7f8 Rb5c5 Bc7e5 b4b5 Re8b8 Bc4d5 Kf8e7 c3c4 Rb8b6
18 00:29 7.097.980 251.568 -1.72 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 g7g5 Rb7b6 Bd6c7 Rb6xb5 Kh8g7 Bd5xc4 Kg7f8 Rb5c5 Bc7e5 b4b5 Re8b8 Bc4d5 Kf8e7 c3c4 Rb8b6
19 00:40 10.014.678 255.386 -1.72 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 g7g5 Rb7b6 Bd6c7 Rb6xb5 Kh8g7 Bd5xc4 Kg7f8 Rb5c5 Bc7e5 b4b5 Re8b8 Bc4d5 Kf8e7 c3c4 Rb8b6
20 01:15 19.638.482 268.614 -1.62 Qf2b6 Ra7c7 e5e4 Bg2xe4 Qb6e3 Be4d5 Qe3e2+
21 01:31 24.210.884 272.358 -1.62 Qf2b6 Ra7c7 e5e4 Bg2xe4 Qb6e3 Be4d5 Qe3e2+
22 04:19 66.562.734 263.078 -1.79 Qf2b6 Ra7c7 e5e4 Bg2xe4 Rb8d8 Be4d5 Qb6f2+ Bd5g2 Qf2e3 Qf7e6 Qe3xe6 f5xe6 Bf8xd6 Rc7b7 Rd8e8 Bg2d5 g7g5 Rb7b6 Bd6c7 Rb6xb5 Kh8g7 Bd5xc4 Kg7f8 Rb5c5 Bc7e5 b4b5 Re8b8 Bc4d5 Kf8e7 c3c4 h6h5
23 14:32 210.028.917 246.648 -2.19 Qf2b6 Ra7d7 e5e4 Bg2xe4 Qb6e3 Be4g2 Qe3xc3 Rd7b7 Rb8xb7 Qf7xf8+ Kh8h7 Bg2xb7 Qc3xb4 h3h4 Qb4e1 Qf8e7 Qe1d2+ Kh2h3 c4c3 d6d7 c3c2 d7d8Q c2c1Q Qd8xd2 Qc1xd2 Bb7f3 Qd2d3 Kh3g2 Qd3b3 Qe7e6 Qb3b2+
24 23:17 349.769.292 256.302 -2.28 Qf2b6 Ra7d7 e5e4 Bg2xe4 Qb6e3 Be4g2 Qe3xc3 Rd7b7 Rb8xb7 Qf7xf8+ Kh8h7 Bg2xb7 Qc3xb4 h3h4 Qb4e1 Qf8e7 Qe1f2+ Bb7g2 c4c3 d6d7 c3c2 d7d8Q c2c1Q Qe7e4 Qc1e1 Qe4xe1 Qf2xe1 Qd8d3 b5b4 Bg2d5 Qe1f2+
25 35:18 537.618.871 259.929 -2.28 Qf2b6 Ra7d7 e5e4 Bg2xe4 Qb6e3 Be4g2 Qe3xc3 Rd7b7 Rb8xb7 Qf7xf8+ Kh8h7 Bg2xb7 Qc3xb4 h3h4 Qb4e1 Qf8e7 Qe1f2+ Bb7g2 c4c3 d6d7 c3c2 d7d8Q c2c1Q Qe7e4 Qc1e1 Qe4xe1 Qf2xe1 Qd8d3 b5b4 Bg2d5 Qe1f2+
26 1:46:45 1.678.309.723 268.297 -2.47 Qf2b6 Ra7d7 e5e4 Bg2xe4 Qb6e3 Be4g2 Qe3xc3 Rd7b7 Rb8xb7 Qf7xf8+ Kh8h7 Bg2xb7 Qc3xb4 h3h4 Qb4e1 Qf8e7 Qe1f2+ Bb7g2 c4c3 d6d7 c3c2 d7d8Q c2c1Q Qe7e4 Qc1e1 Qe4xe1 Qf2xe1 Qd8d3 b5b4 Bg2d5 Qe1f2+
27 8:07:19 7.423.225,215 259.955 -2.76 Qf2b6 Ra7d7 e5e4 Bg2xe4 Qb6f2+ Be4g2 Rb8a8 Qf7d5 Ra8e8 Rd7f7 Kh8h7 Rf7xf6 Re8e1 h3h4 g7xf6 d6d7 Qf2g1+ Kh2h3 Re1d1 d7d8Q Rd1xd5 Qd8xd5 Qg1e1 Qd5xb5 Bf8d6 Qb5d7+ Qe1e7 Qd7c6 Bd6e5 Qc6xc4 Qe7d7
28 11:10:18 10.311.734,814 262.531 -2.76 Qf2b6 Ra7d7 e5e4 Bg2xe4 Qb6f2+ Be4g2 Rb8a8 Qf7d5 Ra8e8 Rd7f7 Kh8h7 Rf7xf6 Re8e1 h3h4 g7xf6 d6d7 Qf2g1+ Kh2h3 Re1d1 d7d8Q Rd1xd5 Qd8xd5 Qg1e1 Qd5xb5 Bf8d6 Qb5d7+ Qe1e7 Qd7c6 Bd6e5 Qc6xc4 Qe7d7

Impressive, Terry, until the move 67 ... Qe7,
your analysis are the same as mine.
I think 68. QxQ wins, altougth I think that
Qc6 wins too.
There are other lines, but I do not know how black can draw.


[Event "IBM Kasparov vs. Deep Blue Rematch"]
[Site "New York, NY USA"]
[Date "1997.05.04"]
[Round "2"]
[White "Deep Blue"]
[Black "Kasparov, Garry"]
[ECO "C93"]
[Result "1-0"]
[FEN "1r3b1k/R4Qp1/3P1p1p/1p2pP2/1Pp5/2P3PP/5qBK/8 b - -"]

54. Bg2 Qb6 55. Rd7 e4 56. Bxe4 Qf2+ 57. Bg2 Ra8
58. Qd5 Re8 59. Rf7 Kh7 60. Rxf6 Re1 61. h4 gxf6 62. d7
Qg1+ 63. Kh3 Rd1 64. d8=Q Rxd5 65. Qxd5 Qe1 66. Qxb5 Bd6
67. Qd7+ Qe7 1-0

Position after 67...Qe7. Qxe7 wins?

[d]8/3Qq2k/3b1p1p/5P2/1Pp4P/2P3PK/6B1/8 w - -

[PauloSoare]

Using Rybka to analyze each move in the line for several minutes, sometimes half hour, the line stayed remarkably in tack. Reaching the following position.

What do your engines say?


[d] 8/4q2k/2Qb1p1p/5P2/1Pp4P/2P3PK/6B1/8 b - - 8 15

Rybka 3:

26 36:26 518.654.675 242.923 -3.16 Bd6e5 Qc6xc4 Qe7d7 Qc4g4 Qd7f7 c3c4 Qf7g8 b4b5 Qg8xg4+ Kh3xg4 Be5d6 b5b6 Kh7g7 b6b7 Bd6b8 c4c5 Bb8c7 Bg2f1 Bc7b8 Bf1c4 Kg7h7 Bc4b3 Kh7g7 Bb3d5 Bb8c7

Looks like a win for white to me!

How a wrote on my last post, I analysed the position after 68. QxQ, and white wins. I didn´t place the moves here because I don´t have optimization the moves.

Paulo Soares

[TSP]

I ran this out some more and the evaluation jumped to well over 4 in just a few moves.

[d] 8/4q2k/2Qb1p1p/5P2/1Pp4P/2P3PK/6B1/8 b

I agree, perhaps another line that wins despite strong players evaluating the contrary.

Paul, I'll let Rybka run your diagram for awhile then wrap this one up.

[TSP]

Paul, I let Rybka run for nearly an hour and the program found no clear win after 68. QXQ BXQ.

[d] 8/4b2k/5p1p/5P2/1Pp4P/2P3PK/6B1/8 w

(20:50) 160.094.981 131.147 +1.88 Bg2d5 Be7d6 Bd5xc4 Bd6e5 b4b5 Be5xc3 b5b6 Bc3e5 Kh3g4 Kh7g7 Bc4b5 Be5b8 Kg4f3 Kg7f7 g3g4 Kf7e7 Kf3e4 Bb8g3 b6b7 Bg3b8 Ke4d5 Bb8a7 Kd5c6 Ba7b8 Bb5c4 Bb8e5
(58:20) 496.174.573 145.164 +1.88 Bg2d5 Be7d6 Bd5xc4 Bd6e5

[PauloSoare]

You are rigth, Terry, 68. QxQ it´s a draw.
I am not sure that after 44. Kf1 white wins.
For example, we have not analysed 47... Kh7 and
others intermediates moves. I supose that white wins, but...

Paulo Soares