Author: Kurt Utzinger
Date: 12:08:23 08/11/02
Hi Uri
I made the following interesting experiment and are pleased to be able to
demonstrate that White's position after 36...h5 is indeed rather critical and
perhaps even lost. I took Fritz7008 and Aristarch 4.4 and let them play the next
moves for at least 10 min, sometimes 20 min or just so long to be sure that
evaluation and main line is stable. And as you can see from the analysis below
(Ath 1.2/32 MB hash) White's position has become worse from move to move.
The second (identical) experiment was made on the basis of your improvement
27.Ke1, this time however with Shredder 6.02 and Aristarch 4.4 but it was again
Black to get move by move a decisive advantage.
Kurt
Positon before 37.Kg1 (Variation)
Nimzo 7.32 - Aristarch 4.4
[D]1n3bk1/5p2/p1p1p1p1/Pr1bPq1p/Rp1P1P2/1P1N2P1/1R2QK1P/B7 w - - 0 1
Analysis by Fritz 7:
37.Kg1 Nd7 38.Nc1 f6 39.exf6 Nxf6 40.Raa2 Ne4 41.Rc2 h4 42.Qe1 g5
= (0.13) Depth: 14/41 00:01:37 60975kN
= (0.00) Depth: 16/44 00:10:36 406813kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
1n3bk1/5p2/p1p1p1p1/Pr1bPq1p/Rp1P1P2/1P1N2P1/1R2Q2P/B5K1 b - - 0 1
Analysis by Aristarch 4.4:
37...c5
³ (-0.29) Depth: 13/32 00:01:58 53742kN
µ (-1.08) Depth: 16/40 00:15:30 436431kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
1n3bk1/5p2/p3p1p1/PrpbPq1p/Rp1P1P2/1P1N2P1/1R2Q2P/B5K1 w - - 0 1
Analysis by Fritz 7:
38.dxc5 Bxc5+ 39.Nxc5 Rxc5 40.Qe1 Nc6 41.Qb1 Qg4 42.Qf1 Qf5 43.Qb1 Qg4 44.Qf1
Qf5 45.Qb1
² (0.47) Depth: 10/30 00:00:02 1273kN
³ (-0.50) Depth: 16/44 00:16:09 641328kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
1n3bk1/5p2/p3p1p1/PrPbPq1p/Rp3P2/1P1N2P1/1R2Q2P/B5K1 b - - 0 1
Analysis by Aristarch 4.4:
38...Nd7 39.c6 Bxc6 40.Raa2 Nc5 41.Nf2
³ (-0.67) Depth: 13/35 00:01:56 53650kN
³ (-0.68) Depth: 14/37 00:04:32 134698kN
38...Bxc5+ 39.Nxc5
µ (-0.89) Depth: 14/37 00:07:25 222860kN
µ (-0.89) Depth: 14/37 00:12:00 363231kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
1n4k1/5p2/p3p1p1/PrbbPq1p/Rp3P2/1P1N2P1/1R2Q2P/B5K1 w - - 0 1
Analysis by Fritz 7:
39.Nxc5
± (0.81) Depth: 9/27 00:00:00 261kN
³ (-0.66) Depth: 15/44 00:08:42 343943kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
39...Rxc5 forced (no anlysis)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
1n4k1/5p2/p3p1p1/P1rbPq1p/Rp3P2/1P4P1/1R2Q2P/B5K1 w - - 0 1
Analysis by Fritz 7:
40.Qe1--
-+ (-1.41) Depth: 14/39 00:01:32 60543kN
µ (-1.19) Depth: 17/43 00:14:04 567728kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
1n4k1/5p2/p3p1p1/P1rbPq1p/Rp3P2/1P4P1/1R5P/B3Q1K1 b - - 0 1
Analysis by Aristarch 4.4:
40...Nc6 41.Rf2
µ (-1.12) Depth: 13/36 00:01:57 60973kN
µ (-1.32) Depth: 15/36 00:08:28 267935kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
6k1/5p2/p1n1p1p1/P1rbPq1p/Rp3P2/1P4P1/1R5P/B3Q1K1 w - - 0 1
Analysis by Fritz 7:
41.Re2 Qd3 42.Raa2 Qf3 43.Rg2 h4 44.f5 exf5 45.gxh4 Qf4 46.Rgc2
³ (-0.59) Depth: 11/34 00:00:10 6754kN
µ (-1.16) Depth: 16/40 00:17:00 682928kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
6k1/5p2/p1n1p1p1/P1rbPq1p/Rp3P2/1P4P1/4R2P/B3Q1K1 b - - 0 1
Analysis by Aristarch 4.4:
41...Qg4 42.Re3 Rc2
-+ (-1.47) Depth: 14/35 00:04:18 138064kN
-+ (-1.78) Depth: 15/39 00:09:09 295807kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
6k1/5p2/p1n1p1p1/P1rbP2p/Rp3Pq1/1P4P1/4R2P/B3Q1K1 w - - 0 1
Analysis by Fritz 7:
42.Re3 Rc2 43.Qf1 Rd2 44.h3 Qf5 45.Bc3 Rg2+ 46.Qxg2 Bxg2 47.Kxg2
= (-0.22) Depth: 8/24 00:00:00 378kN
-+ (-3.16) Depth: 14/42 00:02:53 104618kN
42.Bb2 Qf3 43.Qf1 Qh1+ 44.Kf2 Qxh2+ 45.Ke1 Qxg3+ 46.Qf2 Qxf2+ 47.Rxf2 Bxb3
-+ (-3.12) Depth: 14/42 00:04:03 152047kN
-+ (-2.25) Depth: 14/42 00:04:54 185551kN
42.Raa2 Qf3 43.Rg2 h4 44.gxh4 Qxf4 45.Rgf2 Qg4+ 46.Rg2 Bxg2 47.Rxg2
-+ (-2.22) Depth: 14/42 00:05:03 191578kN
-+ (-1.50) Depth: 16/42 00:11:54 470912kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
6k1/5p2/p1n1p1p1/P1rbP2p/1p3Pq1/1P4P1/R3R2P/B3Q1K1 b - - 0 1
Analysis by Aristarch 4.4:
42...Qf3 43.Rg2 Rxa5 44.Rae2 h4
-+ (-1.84) Depth: 13/34 00:02:04 62938kN
-+ (-2.07) Depth: 15/37 00:05:41 181622kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
6k1/5p2/p1n1p1p1/P1rbP2p/1p3P2/1P3qP1/R3R2P/B3Q1K1 w - - 0 1
Analysis by Fritz 7:
43.Rg2 h4 44.Raf2 Qxb3 45.gxh4 Bxg2 46.Kxg2 Rc2 47.Rxc2 Qxc2+ 48.Kg3 Qd3+ 49.Kf2
Qh3 50.Qg1
³ (-0.56) Depth: 9/23 00:00:00 283kN
-+ (-2.19) Depth: 17/41 00:21:22 874803kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
6k1/5p2/p1n1p1p1/P1rbP2p/1p3P2/1P3qP1/R5RP/B3Q1K1 b - - 0 1
Analysis by Aristarch 4.4:
43...Rxa5 44.Rac2 h4 45.gxh4
-+ (-2.02) Depth: 12/33 00:01:18 41062kN
-+ (-2.34) Depth: 15/36 00:07:41 261520kN
43...Qxb3 44.Rgf2
-+ (-2.55) Depth: 15/38 00:10:22 346097kN
-+ (-2.98) Depth: 15/38 00:12:08 401677kN
(Utzinger, MyTown 10.08.2002)
--------------------------------------------------------------------------------------------
Nimzo 7.32 - Aristarch 4.4
6k1/5p2/p1n1p1p1/P1rbP2p/1p3P2/1q4P1/R5RP/B3Q1K1 w - - 0 1
Analysis by Fritz 7:
44.Rgb2 Qf3 45.Rg2 Bxa2 46.Rxa2 Rd5 47.Rf2 Qd1 48.Qxd1 Rxd1+ 49.Rf1 Rd8
-+ (-2.22) Depth: 15/38 00:03:43 154095kN
-+ (-2.28) Depth: 16/37 00:07:51 328331kN
44.Rgf2 h4 45.Rab2 Qa3 46.Rf1 Nd4 47.Rbf2 Nc2 48.Qb1 Qe3
-+ (-2.25) Depth: 16/37 00:08:26 352531kN
-+ (-2.16) Depth: 16/39 00:09:42 405476kN
********************************************************************************************
[Event "Arist44_Nim732 P3 800/32 40'/40"]
[Site "Wetzikon"]
[Date "2002.08.10"]
[Round "2"]
[White "Nimzo 7.32"]
[Black "Aristarch 4.4"]
[Result "0-1"]
[ECO "D02"]
[PlyCount "110"]
[EventDate "2002.??.??"]
{Comments by Kurt Utzinger: Nimzo732 with White won material (rook vs bishop)
but did not find a good plan. And this do-nothing policy was punished by
Aristarch 4.4 who started a dangerous counter-attack that soon won material
and the game.} 1. d4 Nf6 2. Nf3 g6 3. g3 d5 4. Bg2 Bg7 5. O-O O-O {
Black last book move} 6. Nbd2 {White last book move} 6... Nc6 7. c4 Be6 8. e3
dxc4 9. Ng5 Bg4 10. f3 Bf5 11. Nxc4 h6 12. Ne4 Qd5 13. Nxf6+ Bxf6 14. b3 Rfd8
15. Bb2 b5 16. Nd2 Qd7 17. Ne4 Bg7 18. Nc5 Qc8 19. f4 Rd6 20. Qc1 Rb8 21. Rf2
Nd8 22. a4 b4 23. e4 Bh3 24. e5 Rdb6 25. a5 Rb5 26. Bd5 a6 27. Bc4 Nc6 28. Bxb5
Rxb5 {Would somebody believe that it will be Black to win this game?} 29. Ra4
Be6 30. Ba1 Bd5 31. Qe3 Bf8 32. Rfa2 Qf5 33. Kf2 Nb8 34. Qe2 c6 35. Rb2 e6 36.
Nd3 h5 {The beginning of Aristarch's attack. White is astonishingly helpless.}
37. Qe3 (37. Kg1 c5 38. dxc5 Bxc5+ 39. Nxc5 Rxc5 40. Qe1 Nc6 41. Re2 Qg4 42.
Raa2 Qf3 43. Rg2 Qxb3 {-+ best moves according to Fritz7008 with White and
Aristarch 4.4 with Black. Analysis for each move see below.}) (37. Ke1 {
The improvement suggested by Uri Blass} 37... c5 38. dxc5 Nc6 39. Qe3 Nxa5 40.
Nc1 Bxc5 41. Qe2 Bb6 42. Qd3 Be4 43. Qf1 Be3 {-+ best moves according to
Shredder602 and Aristarch 4.4. Analysis for each move see below.}) 37... Nd7
38. Ke2 c5 39. Raa2 cxd4 40. Qxd4 Nb8 41. Qe3 Nc6 42. Ke1 Nxa5 43. Nc1 Bc5 44.
Qe2 Kg7 45. Kf1 Bb6 46. Ke1 Rc5 47. Rc2 Nxb3 48. Rxc5 Nxc5 49. Rd2 Ne4 50. Rxd5
exd5 51. Qxa6 Bf2+ 52. Kd1 d4 53. Nd3 b3 54. Kc1 Qg4 55. Nxf2 Nxf2 {P3 800/32 M
B hash, Fritz7-GUI, 40'/40+40'/40+40', ponder=off, 3-4 men TB's, own books} 0-1
Position after 37.Ke1 (Variation)
Analysis by Aristarch 4.4:
1...c5 2.dxc5
³ (-0.67) Depth: 14/34 00:04:21 120316kN
µ (-0.73) Depth: 15/34 00:06:23 177657kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
1n3bk1/5p2/p3p1p1/PrpbPq1p/Rp1P1P2/1P1N2P1/1R2Q2P/B3K3 w - - 0 1
Analysis by Shredder 6.02:
2.Nc1 Nc6 3.Rd2 h4 4.Bb2 cxd4 5.Ra1 g5 6.Bxd4 gxf4 7.g4 Qg5 8.Kf2 Nxa5
= (0.21) Depth: 13/26 00:02:12 32546kN
= (0.00) Depth: 15/30 00:07:49 114903kN
2.dxc5 Nc6 3.Qe3 Nxa5 4.Qe2 Nxb3 5.Rxa6 Rb8 6.Rc2 Be4 7.Nxb4
= (0.01) Depth: 15/30 00:12:46 192799kN
= (0.01) Depth: 15/30 00:13:39 205739kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
1n3bk1/5p2/p3p1p1/PrPbPq1p/Rp3P2/1P1N2P1/1R2Q2P/B3K3 b - - 0 1
Analysis by Aristarch 4.4:
2...Nc6 3.Qe3
² (0.53) Depth: 5/17 00:00:00
µ (-1.07) Depth: 15/37 00:11:35 326639kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
5bk1/5p2/p1n1p1p1/PrPbPq1p/Rp3P2/1P1N2P1/1R2Q2P/B3K3 w - - 0 1
Analysis by Shredder 6.02:
2.Qe3 Nxa5 3.Rxb4 Bxc5 4.Qxc5 Rxc5 5.Nxc5 Nc6 6.Ra4 a5
= (-0.19) Depth: 12/24 00:01:17 18705kN
³ (-0.29) Depth: 14/28 00:05:54 86739kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
5bk1/5p2/p1n1p1p1/PrPbPq1p/Rp3P2/1P1NQ1P1/1R5P/B3K3 b - - 0 1
Analysis by Aristarch 4.4:
2...Nxa5 3.Rxb4
³ (-0.38) Depth: 10/25 00:00:13 5620kN
µ (-0.85) Depth: 15/35 00:07:45 228823kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
5bk1/5p2/p3p1p1/nrPbPq1p/Rp3P2/1P1NQ1P1/1R5P/B3K3 w - - 0 1
Analysis by Shredder 6.02:
3.c6 Bxc6 4.Qe2 Bd5 5.Nc1 Rc5 6.Nd3 Nxb3 7.g4 hxg4
³ (-0.63) Depth: 13/26 00:01:43 26619kN
µ (-0.71) Depth: 15/30 00:08:34 129461kN
3.Rxb4 Bxc5 4.Nxc5 Rxb4 5.Qc3 Nc6 6.Rd2 a5 7.Bb2 Rb8 8.Qd3 Qh3 9.Qe3 Kh7
³ (-0.70) Depth: 15/30 00:09:38 146377kN
³ (-0.59) Depth: 15/30 00:11:27 175289kN
3.Nc1 Bxc5 4.Qe2 Bxb3 5.Nxb3 Qxe5
³ (-0.58) Depth: 15/30 00:18:34 283975kN
³ (-0.58) Depth: 15/30 00:18:34 283975kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
5bk1/5p2/p3p1p1/nrPbPq1p/Rp3P2/1P2Q1P1/1R5P/B1N1K3 b - - 0 1
Analysis by Aristarch 4.4:
3...Bxc5 4.Qd3 Be4 5.Qd8+
-+ (-2.18) Depth: 2/9 00:00:00
µ (-1.20) Depth: 15/41 00:18:35 589416kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
6k1/5p2/p3p1p1/nrbbPq1p/Rp3P2/1P2Q1P1/1R5P/B1N1K3 w - - 0 1
Analysis by Shredder 6.02:
4.Qd3 Qxd3 5.Nxd3 Bxb3 6.Nxc5 Rxc5 7.Rxb4 Rc1+ 8.Kd2 Rxa1 9.R2xb3 Nxb3+ 10.Rxb3
µ (-0.92) Depth: 2/4 00:00:00
µ (-0.77) Depth: 6/12 00:00:00
4.Qe2 g5 5.Qxh5 Be3 6.Nd3
µ (-0.76) Depth: 6/12 00:00:00
µ (-0.95) Depth: 15/30 00:06:48 105790kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
6k1/5p2/p3p1p1/nrbbPq1p/Rp3P2/1P4P1/1R2Q2P/B1N1K3 b - - 0 1
Analysis by Aristarch 4.4:
4...Bb6 5.Qc2
-+ (-1.61) Depth: 12/35 00:06:46 205032kN
-+ (-1.73) Depth: 15/41 00:40:24 1281027kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
6k1/5p2/pb2p1p1/nr1bPq1p/Rp3P2/1P4P1/1R2Q2P/B1N1K3 w - - 0 1
Analysis by Shredder 6.02:
5.Qd3 Be4 6.Qd6 Bc2 7.Rxb4 Bc5 8.Qd8+ Kh7 9.Ra4 Nxb3 10.Ne2 Nd2 11.Rxa6 Nf3+
12.Kf1 Nxh2+ 13.Kg2 Qe4+
µ (-1.10) Depth: 14/28 00:12:19 200707kN
µ (-1.10) Depth: 14/28 00:14:20 232907kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
6k1/5p2/pb2p1p1/nr1bPq1p/Rp3P2/1P1Q2P1/1R5P/B1N1K3 b - - 0 1
Analysis by Aristarch 4.4:
5...Be4 6.Qe2
-+ (-1.49) Depth: 6/20 00:00:00 155kN
-+ (-1.83) Depth: 13/34 00:05:21 176249kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
6k1/5p2/pb2p1p1/nr2Pq1p/Rp2bP2/1P1Q2P1/1R5P/B1N1K3 w - - 0 1
Analysis by Shredder 6.02:
6.Qf1 h4 7.Rd2 hxg3 8.hxg3 Qg4 9.Bd4 Nxb3 10.Nxb3 Qxg3+ 11.Qf2 Rc5
µ (-1.34) Depth: 13/26 00:09:08 145688kN
µ (-1.34) Depth: 13/26 00:09:08 145688kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
6k1/5p2/pb2p1p1/nr2Pq1p/Rp2bP2/1P4P1/1R5P/B1N1KQ2 b - - 0 1
Analysis by Aristarch 4.4:
6...Be3 7.Ke2 Bxc1 8.Qxc1
-+ (-2.25) Depth: 12/34 00:06:50 220117kN
-+ (-2.90) Depth: 13/36 00:09:29 309788kN
(Utzinger, MyTown 11.08.2002)
--------------------------------------------------------------------------------------------
New game
6k1/5p2/p3p1p1/nr2Pq1p/Rp2bP2/1P2b1P1/1R5P/B1N1KQ2 w - - 0 1
Analysis by Shredder 6.02:
7.Na2 Bd4 8.Qe2 Bd5 9.Rc2 Bxa1 10.Nxb4 Nxb3 11.Rc8+ Kh7 12.Nxa6 Bd4 13.Rxd4 Nxd4
-+ (-2.39) Depth: 12/24 00:01:48 29660kN
-+ (-2.39) Depth: 14/28 00:08:19 134929kN
(Utzinger, MyTown 11.08.2002)
********************************************************************************************
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