TalkChess.com

[Eelco de Groot]

29. Qg3! in the variation with 27...Kh8 is a nice find in itself too. Definitely not easy to judge. I just wanted to show that it is winning, with the latest build of Rainbow Serpent running on a lowly Athlon. But I don't think it can find 26. Nf5 yet. It does however have a slightly asymmetrical PV now, only when searching the first Rootmove, inspired by Chess Genius and Ed's stories about "Weinergate" and the "Ossi papers" . I still have an MS Dos computer somewhere that has Chess Genius on its 20 MB hard disk, but I'm not sure it has survived several winters in storage.

[Event "ICCF Olympiad 17 Final"]
[Site "ICCF"]
[Date "2009.09.10"]
[Round "?"]
[White "Bubir, Sergei"]
[Black "Knobel, Rolf"]
[WhiteElo "2614"]
[BlackElo "2591"]
[Result "1-0"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Qc7 6. Be3
a6 7. Qd2 Nf6 8. O-O-O Bb4 9. f3 O-O 10. g4 Ne5 11. g5 Nh5
12. Rg1 b5 13. f4 Nc4 14. Bxc4 bxc4 15. Nde2 Rb8 16. Rg4
Qb7 17. Bd4 d6 18. Rh4 g6 19. Qe3 Bc5 20. b3 Qb4 21. Ng3
Bxd4 22. Rxd4 Nxf4 23. Rxf4 Qa3+ 24. Kd2 e5 25. Nd5 Be6
26. Nf5 Bxd5 27. Ne7+ Kg7 (27... Kh8 {is no better} 28. Rh4
Be6 29. Qg3 $1
{[D]1r3r1k/4Np1p/p2pb1p1/4p1P1/2pRP2R/qP4Q1/P1PK3P/8 b -
-
23/51 37:04 -5.05 29...f5 30.gxf6 Rxf6 31.Nxg6+ Rxg6
32.Qxg6 Qa5+ 33.Ke2 Bg4+ 34.Qxg4 exd4 35.Qd7 h5 36.Qxd6 d3+
37.cxd3 cxd3+ 38.Kd1 Rb6 39.Qd4+ Kg8 40.Qd5+ Qxd5 41.exd5
Kg7 42.Rxh5 Kg6} f5 30. gxf6 $18) 28. Rh4 Be6 29. Qf2 Rg8
30. Rxh7+ Kf8 31. Rxc4 Qa5+ 32. Ke2 Qb5 33. Nd5 1-0

1r3r1k/4Np1p/p2pb1p1/4p1P1/2pRP2R/qP4Q1/P1PK3P/8 b - -

Engine: Rainbow Serpent 2.2.4 Build 134 (Athlon 2010 Mhz, single thread, 256 MB) Slightly asymmetrical 'Chess Genius' PV.
by Tord Romstad, Marco Costalba and Joona Kiiski

1/02 0:00 +7.95 29...c3+ 30.Ke2 exd4 (6.369) 398

2/04 0:00 +7.39 29...cxb3 30.Rd5 Bxd5 31.Nxd5 Qxa2 (14.603) 310

3/07 0:00 +7.67 29...Qa5+ 30.Qc3 Qxc3+ 31.Kxc3 exd4+
32.Kd2 Kg7 33.bxc4 f6 34.gxf6+ Rxf6
35.Nc6 g5 36.Rh5 (58.978) 418

4/08 0:00 +6.62 29...Qa5+ 30.Qc3 Qb6 31.Ke3 exd4+
32.Qxd4+ Qxd4+ 33.Kxd4 h5 34.Nc6 Rb5 (68.152) 396

5/08 0:01 +4.88 29...h5 30.Rd5 Bxd5 31.Nxd5 cxb3
32.Ke1 Qc1+ (684.427) 465

6/08 0:01 +5.13++ 29...h5 30.Qf3 exd4 31.Qf6+ Kh7
32.Rxh5+ gxh5 33.Qh6+ (705.714) 465

6/08 0:01 +4.72-- 29...h5 30.Qf3 Qb4+ 31.Ke2 Qa5
32.Rxd6 Rfe8 (819.488) 459

6/08 0:01 +4.61-- 29...h5 30.Qf3 Qxa2 31.Rxd6 Qa5+
32.Ke2 cxb3 33.cxb3 Bxb3 (834.386) 460

6/08 0:01 +4.43-- 29...h5 30.Qf3 Qxa2 31.Rxd6 Qa5+
32.Kd1 Rb6 (849.004) 464

6/08 0:01 +4.15-- 29...h5 30.Qf3 Qxa2 31.Rxd6 c3+
32.Qxc3 Rb5 (863.654) 464

6/08 0:01 +3.75-- 29...h5 30.Qf3 c3+ 31.Kd3 Qxa2
32.Rxd6 Kh7 33.Qf6 Rbd8 (896.744) 462

6/08 0:02 +3.14-- 29...h5 30.Qf3 c3+ 31.Kd3 Bc4+
32.bxc4 exd4 33.Qf6+ Kh7 34.Kxd4 Qc5+
35.Kd3 Qf5 (1.215.163) 460

6/08 0:03 +2.22-- 29...h5 30.Qf3 Qxa2 31.Rxd6 Kh7
32.Qf6 Rfd8 33.Nf5 cxb3 34.Rxd8 Qa5+
35.Ke2 Rxd8 (1.614.073) 453

6/10 0:03 +2.23 29...h5 30.Qf3 Qa5+ 31.Kd1 Bg4
32.Rxg4 exd4 33.Qf6+ Kh7 34.Nc6 Qxa2
35.Qxd6 (1.675.817) 452

7/10 0:05 +2.30 29...h5 30.Qf2 Kh7 31.Rxh5+ gxh5
32.Qf6 Qa5+ 33.Kc1 Rb7 34.g6+ (2.494.901) 448

8/11 0:07 +2.14-- 29...h5 30.Qf2 Kh7 31.Rxh5+ gxh5
32.Qf6 Qa5+ 33.Kc1 Qe1+ 34.Rd1 Qe3+
35.Kb1 Bd7 36.Qxd6 Be6 (3.563.175) 448

8/11 0:08 +2.06-- 29...h5 30.Qf2 Kh7 31.Rxh5+ gxh5
32.Qf6 Qa5+ 33.Kc1 Qb5 34.Rxd6 Qb6
35.Rxb6 (3.761.504) 451

8/11 0:08 +1.93-- 29...h5 30.Qf2 Kh7 31.Rxh5+ gxh5
32.Qf6 c3+ 33.Ke2 Bg4+ 34.Kf2 Bd7
35.Rxd6 Rbd8 (3.962.821) 455

8/11 0:09 +1.75-- 29...h5 30.Qf2 Kh7 31.Rxh5+ gxh5
32.Qf6 Qa5+ 33.Kc1 Qe1+ 34.Rd1 Qxd1+
35.Kxd1 cxb3 36.g6+ Kh6 (4.288.230) 458

8/11 0:11 +1.47-- 29...h5 30.Qf2 Kh7 31.Rxh5+ gxh5
32.Qf6 Qa5+ 33.Kc1 Rh8 34.g6+ Kh6
35.gxf7+ Kh7 36.Qxe6 Rxb3 (5.345.664) 454

8/13 0:15 +1.07-- 29...h5 30.Qf2 Kh7 31.Rxh5+ gxh5
32.Qf6 c3+ 33.Ke2 Bxb3 34.axb3 Rh8 (6.921.040) 449

8/13 0:19 +0.48 29...h5 30.Qf2 c3+ 31.Kd3 Bg4
32.Qf6+ Kh7 33.Rxd6 Qc1 34.Rxg4 hxg4
35.Nc6 Rbc8 36.Kxc3 Ra8 (8.716.061) 446

9/13 0:20 +0.56++ 29...h5 30.Qf2 f6 31.Nxg6+ Kg7
32.Nxf8 Rxf8 33.Qf5 Bxf5 (9.355.295) 447

9/13 0:21 +0.64++ 29...h5 30.Qf2 f6 31.Nxg6+ Kg7
32.gxf6+ Kxg6 33.Rxc4 Bxc4 34.Qg3+ Kxf6
35.Rf4+ exf4 36.bxc4 fxg3 (9.658.554) 448

9/13 0:21 +0.77++ 29...h5 30.Qf2 f6 31.Nxg6+ Kg7
32.Nxf8 Rxf8 33.Rxc4 Bxc4 34.Qa7+ Bf7
35.gxf6+ Kxf6 36.Qf2+ Kg5 37.Qg3+ Kh6
38.Qg1 (9.726.725) 449

9/13 0:21 +0.80 29...h5 30.Qf2 f6 31.Nxg6+ Kg7
32.Nxf8 Rxf8 33.Rxc4 Bxc4 34.Qf5 Bf7
35.Qxf6+ Kg8 36.Qh6 Qa5+ 37.Kd1 Rc8
38.Qxh5 (9.812.245) 450

10/15 0:25 +0.88++ 29...h5 30.Qf2 Qa5+ 31.Kc1 Kh7
32.Rd2 Qxa2 33.Rxd6 cxb3 (11.390.543) 452

10/15 0:25 +0.95 29...h5 30.Qf2 f6 31.Nxg6+ Kg7
32.Nxf8 Rxf8 33.Rxc4 Bxc4 34.bxc4 fxg5
35.Qg2 Qb4+ 36.Ke2 Qxc4+ 37.Ke3 Kf6
38.Kd2 gxh4 (11.742.056) 454

11/15 0:27 +1.05++ 29...h5 30.Qf2 f6 31.Nxg6+ Kg7
32.Nxf8 Rxf8 33.Rxc4 Bxc4 34.Rxh5 Be6
35.Qh4 Qxa2 36.gxf6+ Kg8 37.Rh7 Qa5+
38.Ke2 Rc8 (12.436.396) 457

11/15 0:27 +1.05 29...h5 30.Qf2 f6 31.Rxc4 Bxc4
32.Nxg6+ Kg7 33.Nxf8 Rxf8 34.Qf5 Qa5+
35.Kd1 Qc5 36.Rxh5 Qg1+ 37.Kd2 Qg2+
38.Kc3 Bg8 39.Kb2 fxg5 40.Rxg5+ Kh6 (12.604.800) 459

12/19 0:35 +1.11 29...h5 30.Qf2 f6 31.Rxc4 Bxc4
32.Nxg6+ Kg7 33.Nxf8 Rxf8 34.Qf5 Bf7
35.gxf6+ Kh6 36.Qg4 Qb4+ 37.c3 Be8
38.cxb4 (16.335.493) 461

13/21 1:37 +0.89-- 29...h5 30.Qf2 f5 31.Rxc4 Rf7
32.Nxg6+ Kg7 33.Qe2 Bxc4 34.Qxh5 Bd5
35.exf5 Be6 36.fxe6 (43.824.000) 448

13/21 1:39 +1.15 29...h5 30.Qf2 f6 31.Rxc4 Bxc4
32.Nxg6+ Kg7 33.Nxf8 Rxf8 34.Rxh5 Be6
35.gxf6+ Kg6 36.Qh4 Qb4+ 37.Kc1 Qa5
38.Qg5+ Kf7 39.Rh7+ Ke8 40.Qg7 Qxa2 (44.904.970) 449

14/23 2:07 +0.92-- 29...h5 30.Qf2 f5 31.Rxc4 Kh7
32.exf5 Rb7 33.Ra4 Qb2 34.Rxh5+ gxh5
35.Rxa6 Rxe7 (57.107.311) 448

14/23 2:19 +0.84-- 29...h5 30.Qf2 f5 31.Rxc4 Qa5+
32.Rc3 fxe4 33.Nxg6+ Kg7 34.Nxf8 Rxf8
35.Qa7+ Rf7 36.Qg1 Rf3 37.Qa7+ Kg6
38.Qc7 Qb4 39.h3 e3+ 40.Ke2 Rf2+
41.Kd1 (62.590.007) 449

14/25 2:38 +1.22 29...h5 30.Qf2 f5 31.Rxc4 fxe4
32.Nxg6+ Kg8 33.Nxf8 Rxf8 34.Qe2 Qa5+
35.Kd1 e3 36.Rb4 Qxa2 37.Rbc4 Bg4
38.Re4 Bxe2+ 39.Kxe2 (71.381.305) 450

15/26 3:04 +0.98-- 29...h5 30.Qf3 Bg4 31.Qxg4 Qb4+
32.c3 Rb7 33.cxb4 c3+ 34.Kxc3 Rxb4 (83.059.358) 450

15/26 3:06 +0.91-- 29...h5 30.Qf3 Bg4 31.Qxg4 Qb4+
32.c3 Rb7 33.cxb4 c3+ 34.Kxc3 Rxb4 (83.940.820) 450

15/26 3:07 +0.79-- 29...h5 30.Qf3 Bg4 31.Qxg4 Qb4+
32.c3 Rb7 33.cxb4 c3+ 34.Kxc3 Rxb4 (84.483.407) 450

15/26 3:08 +0.61-- 29...h5 30.Qf3 Bg4 31.Qxg4 Qb4+
32.c3 Rb7 33.cxb4 c3+ 34.Kxc3 exd4+
35.Kxd4 Rxb4+ 36.Kd5 Rb5+ 37.Kxd6 Kg7
38.Nxg6 fxg6 39.Rxh5 gxh5 (85.138.162) 450

15/26 3:10 +0.33-- 29...h5 30.Qf3 Bg4 31.Qxg4 Qb4+
32.c3 Rb7 33.cxb4 c3+ 34.Kxc3 exd4+
35.Kxd4 Rxb4+ 36.Kd5 Rb5+ 37.Kxd6 Kg7
38.Nxg6 Rxb3 (85.856.879) 450

15/26 3:12 0.00 29...h5 30.Qf3 Rg8 31.Qf6+ Rg7
32.Rxh5+ gxh5 33.Qh6+ Rh7 34.Qf6+ Rg7 (86.692.812) 450

16/26 3:30 -0.24-- 29...h5 30.Qf3 Rg8 31.Rxh5+ Kg7
32.Qf6+ Kf8 33.Rh8 Qa5+ 34.Kc1 Rxh8
35.Nxg6+ Ke8 36.Qxh8+ Kd7 37.Nxe5+ (95.183.538) 451

16/26 3:38 -0.32-- 29...h5 30.Qf3 Rg8 31.Rxh5+ Kg7
32.Qf6+ Kf8 33.Rh8 Qa5+ 34.Kc1 Rxh8
35.Nxg6+ Ke8 36.Qxh8+ Kd7 37.Nxe5+ (98.918.020) 452

16/26 3:42 -0.44-- 29...h5 30.Qf3 Rg8 31.Rxh5+ Kg7
32.Qf6+ Kf8 33.Rh8 Qa5+ 34.Kc1 Rxh8
35.Nxg6+ Ke8 36.Qxh8+ Kd7 37.Nxe5+ (100.604.304) 452

16/26 3:44 -0.62-- 29...h5 30.Qf3 Rg8 31.Rxh5+ Kg7
32.Qf6+ Kf8 33.Rh8 Qa5+ 34.Kc1 Rxh8
35.Nxg6+ Ke8 36.Qxh8+ Kd7 37.Nxe5+ (101.745.553) 452

16/26 3:48 -0.89-- 29...h5 30.Qf3 Rg8 31.Rxh5+ Kg7
32.Qf6+ Kf8 33.Rh8 Qa5+ 34.Kc1 Rxh8
35.Nxg6+ Ke8 36.Qxh8+ Kd7 37.Nxe5+ (103.530.077) 453

16/26 3:50 -1.30-- 29...h5 30.Qf3 Rg8 31.Rxh5+ Kg7
32.Qf6+ Kf8 33.Rh8 Qa5+ 34.Kc1 Rxh8
35.Nxg6+ Ke8 36.Qxh8+ Kd7 37.Nxe5+ (104.801.741) 453

16/26 3:55 -1.91-- 29...h5 30.Qf3 Rg8 31.Rxh5+ Kg7
32.Qf6+ Kf8 33.Rh8 Qa5+ 34.Kc1 Rxh8
35.Nxg6+ Ke8 36.Qxh8+ Kd7 37.Nxe5+ (106.842.011) 454

16/38 5:10 -2.82 29...f5 30.gxf6 Qa5+ 31.Ke2 Rxf6
32.Nxg6+ Rxg6 33.Qxg6 Bg4+ 34.Qxg4 exd4
35.Qd7 d3+ 36.cxd3 cxd3+ 37.Kxd3 Qb5+
38.Qxb5 axb5 39.Rh6 Rd8 40.Rh5 b4
41.Rd5 Kg7 42.Rg5+ Kf6 (141.964.190) 457

17/38 5:48 -2.70 29...f5 30.gxf6 Qa5+ 31.Ke2 Rxf6
32.Nxg6+ Rxg6 33.Qxg6 Bg4+ 34.Qxg4 exd4
35.Qd7 d3+ 36.cxd3 cxd3+ 37.Kxd3 Qb5+
38.Qxb5 axb5 39.Rh6 Rd8 40.a4 Kg7
41.Rh5 bxa4 42.bxa4 Ra8 (159.136.807) 456

18/38 7:25 -2.95 29...h5 30.Qf3 Bg4 31.Qxg4 Kg7
32.Qf3 f6 33.Nf5+ Kg8 34.Rxc4 fxg5
35.Qg3 Qa5+ 36.Rc3 Qd8 37.Rf3 Rc8
38.Qg2 gxf5 (202.016.054) 453

19/38 9:24 -3.23-- 29...h5 30.Qf3 Bg4 31.Qxg4 Kg7
32.Qf3 f6 33.Nf5+ Kg8 34.Rxc4 fxg5
35.Rxh5 Rxf5 36.exf5 Qa5+ 37.Ke2 gxh5
38.Qxh5 Rd8 39.Qxg5+ Kh7 40.Qe7+ Kg8 (257.099.327) 455

19/38 9:35 -3.31-- 29...h5 30.Qf3 Bg4 31.Qxg4 Kg7
32.Qf3 f6 33.Nf5+ Kg8 34.Rxc4 fxg5
35.Rxh5 Rxf5 36.exf5 Qa5+ 37.b4 Qb5
38.Rxg5 Qxc4 39.Rxg6+ Kf8 40.Qd3 (261.945.492) 455

19/38 9:39 -3.43-- 29...h5 30.Qf3 Bg4 31.Qxg4 Kg7
32.Qf3 f6 33.Nf5+ Kg8 34.Rxc4 fxg5
35.Rxh5 Rxf5 36.exf5 Qa5+ 37.Ke2 gxh5
38.Qxh5 Qb6 39.Qxg5+ Kf7 40.Qg6+ Kf8
41.f6 Qb7 42.Qh6+ Ke8 (263.829.271) 455

19/38 9:54 -3.61-- 29...h5 30.Qf3 Bg4 31.Qxg4 Kg7
32.Qf3 f6 33.Nf5+ Kg8 34.Rxc4 fxg5 (270.359.542) 455

19/39 10:13 -3.88-- 29...h5 30.Qf3 Bg4 31.Qxg4 Kg7
32.Qf3 f6 33.Nf5+ Kg8 34.Rxc4 fxg5
35.Rxh5 Rxf5 36.exf5 Qa5+ 37.Ke2 gxh5
38.Qxh5 Qd8 39.Qg6+ Kh8 40.Rc6 Qe7
41.Qh6+ Kg8 42.Rxd6 e4 (279.852.706) 456

19/39 10:45 -3.79 29...f5 30.gxf6 Qa5+ 31.Ke2 Rxf6
32.Nxg6+ Rxg6 33.Qxg6 Bg4+ 34.Qxg4 exd4
35.Qd7 d3+ 36.cxd3 h5 37.Qxd6 cxd3+
38.Kxd3 Qb5+ 39.Kd4 Kg7 40.Rf4 Qb4+
41.Qxb4 Rxb4+ 42.Kc3 a5 (295.164.405) 457

20/39 14:17 -4.08-- 29...f5 30.gxf6 Qa5+ 31.Ke2 Rxf6
32.Nxg6+ Rxg6 33.Qxg6 Bg4+ 34.Qxg4 exd4
35.Qd7 d3+ 36.cxd3 h5 37.Qxd6 cxd3+
38.Kd1 Rb6 39.Qf8+ Kh7 40.Rf4 Rb7
41.Rf5 Qxf5 42.exf5 d2 (391.468.337) 456

20/39 14:29 -4.16-- 29...f5 30.gxf6 Qa5+ 31.Ke2 Rxf6
32.Nxg6+ Rxg6 33.Qxg6 Bg4+ 34.Qxg4 exd4
35.Qd7 d3+ 36.cxd3 h5 37.Qxd6 cxd3+
38.Kd1 Rb6 39.Qf8+ Kh7 40.Rf4 Rb7
41.Rf5 Rb8 42.Qxb8 Qd8 (396.896.969) 456

20/39 14:36 -4.28-- 29...f5 30.gxf6 Qa5+ 31.Ke2 Rxf6
32.Nxg6+ Rxg6 33.Qxg6 Bg4+ 34.Qxg4 exd4
35.Qd7 d3+ 36.cxd3 h5 37.Qxd6 cxd3+
38.Kd1 Rb6 39.Qf8+ Kh7 40.Rf4 Rb7
41.Rf5 h4 42.Rxa5 Rb5 (400.139.964) 456

20/39 16:13 -4.43 29...h5 30.Qf3 Bg4 31.Qxg4 Kg7
32.Qf3 f6 33.Rxc4 Qa5+ 34.Qc3 Qxc3+ (447.325.630) 459

21/47 20:09 -4.72-- 29...h5 30.Qf3 Bg4 31.Qxg4 Kg7
32.Qf3 f6 33.Nf5+ gxf5 34.Qxh5 c3+
35.Ke2 Rh8 36.gxf6+ Kxf6 37.Qxf5+ Ke7
38.Rh7+ Rxh7 39.Qxh7+ Ke6 40.Qh6+ Ke7
41.Rc4 Kd7 42.Qh7+ Ke6 (564.633.463) 466

21/51 24:04 -4.80-- 29...h5 30.Qf3 Bg4 31.Qxg4 Kg7
32.Qf3 f6 33.Nf5+ gxf5 34.Qxh5 c3+
35.Ke2 Rh8 36.gxf6+ Kxf6 37.Qxf5+ Ke7
38.Rh7+ Rxh7 39.Qxh7+ Ke6 40.Qh6+ Ke7
41.Rc4 Kd7 42.Qh7+ Ke6 (690.512.401) 478

21/51 24:42 -4.76 29...h5 30.Qf3 Bg4 31.Qxg4 Kg7
32.Qf3 f6 33.Nf5+ gxf5 34.Qxh5 Rh8
35.gxf6+ Kxf6 36.Qxf5+ Ke7 37.Qg5+ Kd7
38.Qg7+ Ke6 39.Rh6+ Rxh6 40.Qxh6+ Kd7
41.Qg7+ Ke6 42.Rxc4 Qa5+ (709.561.754) 478

22/51 32:39 -5.05 29...f5 30.gxf6 Rxf6 31.Nxg6+ Rxg6
32.Qxg6 Qa5+ 33.Ke2 Bg4+ 34.Qxg4 exd4
35.Qd7 h5 36.Qxd6 d3+ 37.cxd3 cxd3+
38.Kd1 Rb6 39.Qd4+ Kg8 40.Qd5+ Qxd5
41.exd5 Kg7 42.Rxh5 Kg6 (941.263.303) 480

23/51 37:04 -5.05 29...f5 30.gxf6 Rxf6 31.Nxg6+ Rxg6
32.Qxg6 Qa5+ 33.Ke2 Bg4+ 34.Qxg4 exd4
35.Qd7 h5 36.Qxd6 d3+ 37.cxd3 cxd3+
38.Kd1 Rb6 39.Qd4+ Kg8 40.Qd5+ Qxd5
41.exd5 Kg7 42.Rxh5 Kg6 (1.061.734.805) 477

best move: f7-f5 time: 42:43.031 min n/s: 477.254 nodes: 1.061.734.805

Eelco
_________________
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan