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Up Topic The Rybka Lounge / Test Positions / One neat move
- - By MoKy (**) [sk] Date 2011-11-10 18:25
Here is a position from my older corr. chess game

4rrk1/p2q1pp1/2pbb3/1p4P1/3P3Q/1BP2R2/P7/R1B3K1 w - - 0 23


Can your engines find an extraordinary move, which leads to a big advantage? :fat:
Parent - - By Akbarfan (***) Date 2011-11-10 19:32
Is this the right position? In your game one rook stands on a8 (black to move) and black took 22...Bxb3

r4rk1/p2q1pp1/2pbb3/1p4P1/3P3Q/1BP2R2/P7/R1B3K1 b - - 0 22
Parent - - By MoKy (**) [sk] Date 2011-11-10 19:41 Edited 2011-11-10 19:45
The question is, why i didn't play 22...Rae8?
Parent - - By kgburcham (***) [us] Date 2011-11-10 22:29
4rrk1/p2q1pp1/2pbb3/1p4P1/3P3Q/1BP2R2/P7/R1B3K1 w - -


23.Ba3
+0.71++  23.Ba3 Bxa3 24.Kf2 Bxb3 25.Rh1 f6
Parent - - By Akbarfan (***) Date 2011-11-10 22:48
23.Ba3 Bxb3 :eek:  24.Bxd6 Dxd6 25.Rh3 f5!
Parent - By kgburcham (***) [us] Date 2011-11-10 23:31
Yes

20 2:58   +0.94   23...Bxb3 24.Bxd6 Qxd6 (1.526.686.184) 8536
20 2:58   +2.90   23...Bxa3 24.Kf2 Bxb3 25.Rh1 f6 26.axb3 Qe6 (1.526.686.184) 8536
20 2:58   +4.44   23...b4 24.Kf2 Bxb3 25.Rh1 f6 26.Qh7+ Kf7 (1.526.686.184) 8536
Parent - - By Eelco de Groot (***) Date 2011-11-18 10:17
Is it not crazy what the computers can teach us? Taking on b3, instead of a3! I still can only find it when using multi PV. Maybe it is Zugzwang. Not sure though. So how does Houdini avoid Zugzwang? Strelka is just Houdini here without the obfuscated output so that doesn't count, sorry Yuri. Unless you can prove it is doing things really different. Houdini's eval is too low apparently that is what Strelka shows us. But, how to avoid the Zugzwang! In multi PV it was found quickly, here is 23 plies deep the first thirteen moves:

4rrk1/p2q1pp1/2pbb3/1p4P1/3P3Q/1BP2R2/P7/R1B3K1 w - -


Engine: Stockfish  Kingdefender (Rainbow Serpent, Build 089, Athlon 2009 MHz, 48
MB, using "critical node" singular extensions combined with suppression of LMR in
the child ALL node) by Tord Romstad, Marco Costalba and Joona Kiiski

23     52:42  +1.81    1.Ba3 Bxb3 2.Bxd6 Qxd6 3.Rh3 f5
                       4.axb3 Kf7 (768.241.696) 242

23     52:42  +0.36    1.Be3 Bc7 2.Raf1 Bxb3 3.axb3 Qe6
                       4.Rh3 Qxe3+ 5.Rxe3 Rxe3 6.Kg2 Rg3+
                       7.Kf2 Rxc3 8.Qe4 Rxb3 9.Ke2 Rb2+
                       10.Kd3 Rb3+ 11.Kc2 Rh3 12.Qxc6 Rh2+
                       13.Kd3 Rh3+ 14.Ke2 (768.241.696) 242

23     52:42  +0.20    1.Bd2 g6 2.Raf1 c5 3.Bxe6 fxe6 4.Rf6 Qh7
                       5.Qxh7+ Kxh7 6.Rf7+ Kg8 7.Rxa7 Re7
                       8.Rxf8+ Kxf8 9.Ra5 cxd4 10.cxd4 Rc7
                       11.Kf2 Rc2 12.Ra8+ Ke7 13.Ra7+ (768.241.696) 242

23     52:42  0.00     1.Kf2 Bxb3 2.axb3 Qe6 3.Be3 Qg6
                       4.Rh1 f5 5.gxf6 Qc2+ 6.Kg1 Qg6+
                       7.Kf2 (768.241.696) 242

23     52:42  -0.08    1.Bb2 g6 2.Raf1 a5 3.c4 Bg4 4.c5 Bxf3
                       5.Rxf3 Bc7 6.Rh3 Re1+ 7.Kg2 Re2+
                       8.Kf3 (768.241.696) 242

23     52:42  -0.84    1.Bf4 Bxf4 2.Rxf4 Bxb3 3.axb3 Qd5
                       4.Raf1 Qe6 5.R4f2 Qe3 6.Kg2 Qe4+
                       7.Qxe4 Rxe4 8.Ra2 b4 9.Kf3 Rfe8
                       10.cxb4 Rxd4 11.Rxa7 Rxb4 12.Rb1 (768.241.696) 242

23     52:42  -1.09    1.Bc2 g6 2.Rf6 Bh3 3.Bf4 Bxf4 4.Rxf4 Re3
                       5.Bxg6 fxg6 6.Rxf8+ Kxf8 7.Qf2+ Qf5
                       8.Qxe3 Qg4+ 9.Kf2 Qg2+ 10.Ke1 Qf1+
                       11.Kd2 (768.241.696) 242

23     52:42  -1.53    1.Bxe6 Qxe6 2.Bf4 Bxf4 3.Qxf4 Qe2
                       4.Qg3 c5 5.Raf1 cxd4 6.cxd4 Qe4
                       7.Rf4 Qg6 8.R4f2 Rd8 9.Qg4 b4 10.d5 Rxd5
                       11.Rxf7 (768.241.696) 242

23     52:42  -1.61    1.Rf1 Bf5 2.Bf4 Re4 3.Rf2 Bxf4
                       4.Rxf4 Rfe8 5.Raf1 Rxf4 6.Rxf4 Re2
                       7.Rf2 Re1+ 8.Rf1 Rxf1+ 9.Kxf1 Be6
                       10.Qe4 Bd5 (768.241.696) 242

23     52:42  -1.61    1.Kf1 Bf5 2.Kg1 Re4 3.Bf4 Bxf4
                       4.Rxf4 Rfe8 5.Raf1 Rxf4 6.Rxf4 Re2
                       7.Rf2 Re1+ 8.Rf1 Rxf1+ 9.Kxf1 Be6
                       10.Qe4 Bd5 (768.241.696) 242

23     52:42  -1.61    1.Rb1 Bf5 2.Ra1 Re4 3.Bf4 Bxf4
                       4.Rxf4 Rfe8 5.Raf1 Rxf4 6.Rxf4 Re2
                       7.Rf2 Re1+ 8.Rf1 Rxf1+ 9.Kxf1 Be6
                       10.Qe4 Bd5 (768.241.696) 242

23     52:42  -1.61    1.Re3 Bf5 2.Rf3 Re4 3.Bf4 Bxf4
                       4.Rxf4 Rfe8 5.Raf1 Rxf4 6.Rxf4 Re2
                       7.Rf2 Re1+ 8.Rf1 Rxf1+ 9.Kxf1 Be6
                       10.Qe4 Bd5 (768.241.696) 242

23     52:42  -2.30    1.g6 fxg6 2.Rxf8+ Bxf8 3.Qh3 Qf7
                       4.Bxe6 Rxe6 5.Bf4 Qf5 6.Qxf5 gxf5
                       7.Kf2 Kf7 8.Rg1 Ba3 9.Bb8 a6 (768.241.696) 242

Build 89 now, and it is not wrong but I can't just do the first thirteen moves in Multi PV all the time :fat: That is way too costly... What is the magic trick that Houdini is using here :mad: As I said to Jimmy, I feel we are so close to some breakthrough and yet it eludes us...
Parent - By Eelco de Groot (***) Date 2011-11-27 02:34
Happy to say, that I now have at least found a way to solve the position, without the above method resorting to Multi PV of thirteen moves :lol:. The basic problem is with the nullmove searches which are very selective for Rainbow Serpent, with more futility pruning allowed near the root than in Stockfish; Stockfish can have futility pruning in the last 7 plies, Rainbow Serpent in the last 24 plies, with basically the same sort of rule, this involves a risk. When these nullwindow searches are getting too long and they still have not found the right sequence, and they always overlook some things especially if it involves multiple pieces temporarily left en prise, but there is the chance they won't find it ever anymore. I had to go back to a less selective mechanism for this and the solution time is not very competetive with Zappa on a fast rig, but without it the nullwindow search would not find this even after ten hours or so... That is not very close to being usable. Part of that is changed by taking, in retrospect, the Rebel approach actually, where some of the older Rebels actually had a fixed number of plies without much selectivity before becoming very selective in the last plies near the horizon. This approach makes any results at bullet chess/testing tank I suppose, but that is not my main concern right now, engine is not meant for playing Blitz. It must be possible to do some optimizing but if you don't find the requested move even after hours of searching then my method of optimizing is a bit helpless :slim:

4rrk1/p2q1pp1/2pbb3/1p4P1/3P3Q/1BP2R2/P7/R1B3K1 w - -


Engine: Stockfish  Kingdefender (Rainbow Serpent, Build 105, Athlon 2009 MHz, 256
MB, using "critical node" singular extensions combined with suppression of LMR in
the child ALL node) by Tord Romstad, Marco Costalba and Joona Kiiski

1/01   0:00   -0.12    23.Bc2 (323) 1

2/02   0:00   -0.44    23.g6 fxg6 24.Bxe6+ Qxe6 (884) 3

3/04   0:00   +0.84    23.g6 fxg6 24.Rh3 (1.464) 5

4/05   0:00   +0.12    23.Bc2 g6 24.Bf4 Bxf4 25.Rxf4 (3.136) 12

5/05   0:00   +0.12    23.Bc2 g6 24.Bf4 Bxf4 25.Rxf4 (3.702) 13

6/09   0:00   -0.36    23.Bc2 g6 24.Rf6 Qe7 25.Bf4 Bxf4
                       26.Rxf4 (15.457) 54

7/12   0:00   -0.04    23.Bc2 g6 24.Bf4 Bxf4 25.Rxf4 Bf5
                       26.Bb3 (39.412) 120

8/15   0:00   +0.04    23.Bc2 g6 24.Bf4 Bxf4 25.Rxf4 Bd5
                       26.Rf2 Qe7 27.a4 b4 28.cxb4 Qxb4 (88.747) 218

9/17   0:00   0.00     23.Bc2 g6 24.a4 Bd5 25.Re3 Rxe3
                       26.Bxe3 f6 27.gxf6 (195.407) 347

10/20  0:01   0.00     23.g6 fxg6 24.Rh3 Bxb3 25.Qh8+ Kf7
                       26.Rf3+ Ke6 27.Re3+ Kf6 28.Rf3+ Ke6 (638.693) 537

11/21  0:02   -0.46--  23.g6 fxg6 24.Rh3 Rf5 (1.435.660) 629

11/21  0:02   -0.48    23.Bd2 g6 24.Raf1 a5 25.Bxe6 fxe6
                       26.Bf4 Bxf4 27.Rxf4 Rf5 28.Qh6 Qg7 (1.542.435) 632

12/21  0:02   -0.36++  23.Bd2 g6 24.Raf1 a5 25.R1f2 Bxb3
                       26.axb3 (1.892.058) 643

12/21  0:03   -0.24++  23.Bd2 g6 24.Raf1 a5 25.R1f2 Bxb3
                       26.axb3 (1.981.818) 653

12/21  0:03   -0.06++  23.Bd2 g6 24.Raf1 a5 25.R1f2 Bxb3
                       26.axb3 (2.040.431) 656

12/22  0:04   -0.20    23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qg7 27.Bf4 Bxf4 28.Qxf4 cxd4
                       29.cxd4 (2.793.120) 654

13/25  0:05   -0.08++  23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qg7 27.Qh3 cxd4 28.cxd4 (3.611.713) 666

13/25  0:07   -0.28    23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra8+ Kf7
                       32.Rd8 (5.175.236) 674

14/25  0:08   -0.16++  23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra8+ Kf7
                       32.Rd8 (6.066.190) 688

14/25  0:08   -0.04++  23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qg7 27.Qe4 Kh7 28.Qc6 (6.168.099) 692

14/25  0:09   +0.14++  23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra8+ Kf7
                       32.Rd8 (6.517.085) 696

14/34  0:11   -0.04    23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra8+ Kg7
                       32.Ra6 Rd7 33.Kf2 Kf7 34.Be3 cxd4
                       35.cxd4 Be7 36.Ke2 (8.192.110) 699

15/36  0:23   -0.04    23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra6 Rd7
                       32.Kf2 Kf7 33.Be3 cxd4 34.cxd4 Be7
                       35.Ke2 Rc7 36.Kd3 (16.758.324) 713

16/36  0:29   -0.04    23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra6 Rd7
                       32.Kf2 Kf7 33.Be3 cxd4 34.cxd4 Be7
                       35.Ke2 Rc7 36.Kd3 (21.717.691) 732

17/36  0:36   +0.04++  23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra6 Rd7
                       32.Kf2 Kf7 33.Be3 cxd4 34.cxd4 Be7
                       35.Ke2 Rc7 36.Kd3 (27.606.567) 753

17/36  0:42   -0.12--  23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra6 Rd7
                       32.Kf2 Kf7 33.Be3 cxd4 34.cxd4 Be7
                       35.Ke2 Rc7 36.Kd3 (32.568.899) 759

17/36  0:42   -0.04    23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra6 Rd7
                       32.Kf2 Kf7 33.Be3 cxd4 34.cxd4 Be7
                       35.Ke2 Rc7 36.Kd3 (32.622.142) 759

18/36  0:59   +0.04++  23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra6 Rd7
                       32.Kf2 Kf7 33.Ke2 Be7 34.dxc5 Bxc5
                       35.Be3 (45.156.659) 763

18/36  1:09   0.00     23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra6 Rd7
                       32.Kf2 Kf7 33.Be3 cxd4 34.cxd4 Be7
                       35.Ke2 Rc7 36.Kd3 (52.912.041) 761

19/37  1:26   +0.08++  23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra6 Rd7
                       32.Kf2 Kf7 33.Ke2 c4 34.Rb6 (66.950.133) 771

19/37  1:30   +0.16++  23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra6 Rd7
                       32.Kf2 Kf7 33.Ke2 c4 34.Rb6 (70.353.525) 774

19/37  1:44   +0.04    23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Rxf8+ Kxf8 31.Ra6 Rd7
                       32.Kf2 Kf7 33.Ke2 Ke7 34.Be3 cxd4
                       35.cxd4 Rc7 36.Kd3 (80.976.771) 775

20/39  2:21   +0.12++  23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Ra6 Rd7 31.Be3 Bh2+
                       32.Kg2 Rxf1 33.Kxf1 (111.360.103) 784

20/39  2:26   +0.20++  23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Ra6 Rd7 31.Be3 Bh2+
                       32.Kg2 Rxf1 33.Kxf1 (115.650.968) 787

20/39  3:14   +0.28    23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6
                       26.Rf6 Qh7 27.Qxh7+ Kxh7 28.Rf7+ Kg8
                       29.Rxa7 Re7 30.Ra6 Rd7 31.Be3 cxd4
                       32.cxd4 Rf5 33.Kg2 Kg7 34.Rb6 Rxf1
                       35.Kxf1 b4 (153.041.459) 785

21/41  6:50   +0.40++  23.Ba3 {Found at last! Depth is not bad but I hope to optimize it a bit further} Bxa3 24.Kf2 Bxb3 25.Rh1 f5
                       26.g6 Re2+ 27.Kf1 Re1+ 28.Kxe1 Re8+
                       29.Kf2 (311.630.099) 759

21/41  7:00   +0.52++  23.Ba3 Bxa3 24.Kf2 Bxb3 25.Rh1 f5
                       26.g6 Re2+ 27.Kf1 Re1+ 28.Kxe1 Re8+
                       29.Kf2 (319.624.093) 759

21/41  7:11   +0.70++  23.Ba3 Bxa3 24.Kf2 Bxb3 25.Rh1 f5
                       26.g6 Re2+ 27.Kf1 Re1+ 28.Kxe1 Re8+
                       29.Kf2 (327.940.671) 759

21/41  7:25   +0.97++  23.Ba3 Bxa3 24.Kf2 Bxb3 25.Rh1 f5
                       26.g6 Re2+ 27.Kf1 Re1+ 28.Kxe1 Re8+
                       29.Kf2 (338.072.014) 759

21/48  7:55   +1.38++  23.Ba3 Bxa3 24.Kf2 Bxb3 25.Rh1 f5
                       26.g6 Re2+ 27.Kf1 Re1+ 28.Kxe1 Re8+
                       29.Kf2 (360.055.906) 756

21/48  8:35   +1.97    23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 Re7 27.Qh7+ Kf7 28.Qxf5+ Ke8
                       29.Qc8+ Qd8 30.Qxc6+ Qd7 31.Qa8+ Qd8
                       32.Qg2 Qc7 33.c4 Rf5 34.cxb5 Kd7
                       35.Rh8 Re3 36.Rg8 (389.174.116) 754

22/48  9:37   +1.85--  23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 Re7 27.Qh5 g6 28.Qh6 b4
                       29.Rf1 bxc3 30.Qh8+ Kf7 (436.894.729) 755

22/48  11:06  +1.73--  23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 a6 27.Rxa6 Qe6 28.Qh7+ Kf7
                       29.Ra7+ Re7 (503.703.098) 756

22/48  11:42  +1.55--  23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 a6 27.Rxa6 Qe6 28.Qh7+ (532.132.430) 757

22/51  12:04  +1.28--  23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 a6 27.Qh7+ Kf7 28.Rf3 f4
                       29.Rxa6 Ra8 30.Rxa8 Rxa8 31.Qf5+ Ke7
                       32.Rxf4 Ra1+ 33.Kf2 Kd8 34.Qf8+ Qxf8
                       35.Rxf8+ Ke7 (549.932.830) 759

22/74  28:06  +1.25    23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 a5 27.Qh7+ Kf7 28.Rf3 Ke7
                       29.Rxa5 Qe6 30.Ra7+ Kd8 31.Ra8+ Kc7
                       32.Qxg7+ Kd6 (1.251.325.223) 742

23/74  36:22  +1.25    23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 a5 27.Qh7+ Kf7 28.Rf3 Ke7
                       29.Rxa5 Qe6 30.Ra7+ Kd8 31.Ra8+ Kc7
                       32.Qxg7+ Kd6 (1.602.874.995) 734

24/74  53:57  +1.37++  23.Ba3 Bxb3 24.axb3 Re6 25.Bxd6 Rxd6
                       26.Kf2 f5 (2.359.314.763) 728

24/74  56:29  +1.49++  23.Ba3 Bxb3 24.axb3 Re6 25.Bxd6 Rxd6
                       26.Kf2 f5 27.Rh1 Kf7 28.Re1 (2.468.285.731) 728

24/74  58:22  +1.67++  23.Ba3 Bxb3 24.axb3 (2.550.915.824) 728

24/74  63:44  +1.81    23.Ba3 Bxb3 24.axb3 Re6 25.Bxd6 Rxd6
                       26.Kf2 f5 27.Rh1 Kf7 28.Re1 Re8
                       29.Qh7 Rxe1 30.Rxf5+ Ke7 31.Qxg7+ Kd8
                       32.Qxd7+ Rxd7 33.Kxe1 b4 34.Kd2 Ke7
                       35.Kd3 bxc3 36.Kxc3 (2.787.380.064) 728

25/74  70:47  +1.69--  23.Ba3 Bxb3 24.axb3 Re6 (3.114.897.766) 733

25/74  73:00  +1.57--  23.Ba3 Bxb3 24.axb3 Re6 25.Rh3 f5
                       26.Bxd6 Rxd6 27.Re1 Rg6 28.Qh5 Rff6
                       29.Kf2 Re6 30.Re5 Rxe5 31.dxe5 Kf7 (3.224.988.500) 736

25/74  107:31 +1.93++  23.Ba3 Bxb3 24.Bxd6 Bd1 25.g6 Re1+
                       26.Kf2 Re2+ 27.Kf1 (4.293.333.529) 665

25/74  114:41 +1.85    23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 Re7 27.Qh7+ Kf7 28.Qxf5+ Ke8
                       29.Qc8+ Qd8 30.Qxc6+ Qd7 31.Qa8+ Qd8
                       32.Qg2 Qd7 33.g6 Qb7 34.Rh7 Qxg2+
                       35.Kxg2 Kd8 36.Kg3 (4.508.260.134) 655

26/79  182:57 +1.97++  23.Ba3 Bxb3 24.Bxd6 (6.459.204.324) 588

26/79  185:53 +1.73--  23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 Ra8 27.Qh7+ Kf7 28.Re1 (6.546.744.186) 586

26/79  188:00 +1.65    23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 Qe6 27.Qh7+ Kf7 28.Rxa7+ Re7
                       29.Qh5+ g6 30.Qh7+ Ke8 31.Rxe7+ Qxe7
                       32.Qxg6+ Kd8 33.Kf2 Re8 34.Qf6 Qxf6
                       35.gxf6 Rf8 36.Rh6 (6.614.576.981) 586

27/79  225:55 +1.53--  23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 Kf7 (7.766.588.577) 572

27/79  318:39 +1.77++  23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 (10.671.245.143) 558

27/79  328:29 +1.95++  23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 Re7 27.Qh7+ Kf7 28.Qxf5+ Ke8
                       29.Qc8+ Qd8 30.Qxc6+ Qd7 31.Qxd7+ (10.940.675.971) 555

27/79  358:08 +1.97    23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 Re7 27.Qh7+ Kf7 28.Qxf5+ Ke8
                       29.Qc8+ Qd8 30.Qxc6+ Qd7 31.Qa8+ Qd8
                       32.Qg2 Qd6 33.Qh1 Qd7 34.Rg3 Qb7
                       35.Qxb7 Rxb7 36.Kg2 (12.085.267.786) 562

28/79  379:15 +1.85--  23.Ba3 Bxb3 24.Bxd6 Qxd6 (13.061.514.397) 574

28/79  387:04 +1.73--  23.Ba3 Bxb3 (13.416.062.916) 577

28/79  542:13 +2.10++  23.Ba3 Bxb3 24.axb3 Re6 25.Rh3 f5
                       26.Qh5 f4 27.Bxd6 Rxd6 28.Rh2 Rf5
                       29.Re1 Kf8 30.Rhe2 Kg8 31.Re7 (20.116.001.594) 618

28/79  575:49 +2.37++  23.Ba3 Bxb3 24.axb3 Re6 25.Rh3 f5
                       26.Qh5 f4 27.Bxd6 Rxd6 28.Rh2 Rf5 (21.648.974.090) 626

28/79  585:53 +1.55--  23.Ba3 Bxb3 24.axb3 Re6 25.Rh3 f5
                       26.Qh5 Bxa3 27.Rxa3 Re1+ 28.Kf2 Qc7 (22.130.287.947) 629

28/79  676:17 +1.69    23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5
                       26.axb3 Re7 27.Qh7+ Kf7 (26.141.359.826) 644

best move: Bc1-a3 time: 748:31.625 min  n/s: 644.232  nodes: 26.141.359.826
Parent - By Clementin (*) [ca] Date 2011-11-11 02:12
Very nice move!

Chiron 1.1 - 1 core (netbook) 
 28  +1.23  1105.1M  52:26.17  Ba3 Bxb3 Bxd6 Qxd6 Rh3 f5 axb3 Re7 Qh7+ Kf7 Qxf5+ Ke8 Qc8+ Qd8 Qxc6+ Qd7 Qa8+ Qd8 Qg2 Qd7 g6 Qb7 Qg4 Kd8 Qg5 Kc8 Qc5+ Qc7 Qxb5 Re6 Kh1 Rxg6 d5 Rb6 Qc4 Qxc4 100% tb: 2
 27  +1.23  965.8M  45:56.04  Ba3 Bxb3 Bxd6 Qxd6 Rh3 f5 axb3 Re7 Qh7+ Kf7 Qxf5+ Ke8 Qc8+ Qd8 Qxc6+ Qd7 Qa8+ Qd8 Qg2 Qd7 g6 Qb7 Qg4 Kd8 Qg5 Kc8 Qc5+ Qc7 Qxb5 Re6 Kh1 Rxg6 d5 Rb6 Qc4 Qxc4 100% tb: 2
 27  +1.14  738.6M  35:31.15  Ba3 100% tb: 2
 27  +1.14  729.3M  35:02.82  Ba3 Bxb3 Bxd6 Qxd6 Rh3 f5 axb3 Re7 Qh7+ Kf7 Qxf5+ Ke8 Qc8+ Qd8 Qxc6+ Qd7 Qa8+ Qd8 Qg2 Qd7 Kh2 Qc7+ Kh1 Qb7 d5 a5 c4 bxc4 bxc4 Qb4 Qc2 Re1+ Rxe1+ Qxe1+ Kh2 Qf2+ 100% tb: 2
 26  +1.31  667.1M  32:04.16  Ba3 Bxb3 Bxd6 Qxd6 Rh3 f5 axb3 Re7 Qh7+ Kf7 Qxf5+ Ke8 Qc8+ Qd8 Qxc6+ Qd7 Qa8+ Qd8 Qg2 Qd7 Kh2 Qd6+ Kh1 b4 Qa8+ Qd8 Qxd8+ Kxd8 c4 g6 Kg2 Re2+ Kg1 Re4 d5 Rf7 100% tb: 2
 25  +1.28  547.8M  26:10.82  Ba3 Bxb3 Bxd6 Qxd6 Rh3 f5 axb3 Re7 Qh7+ Kf7 Qxf5+ Ke8 Qc8+ Qd8 Qxc6+ Qd7 Qa8+ Qd8 Qg2 Qd7 Kh2 Qd6+ Kh1 b4 Qa8+ Qd8 Qxd8+ Kxd8 c4 g6 Kg2 Re2+ Kg1 Re4 Rh7 Rxd4  99% tb: 2
 24  +1.24  417.4M  19:47.84  Ba3 Bxb3 Bxd6 Qxd6 Rh3 f5 axb3 Re7 Qh7+ Kf7 Qxf5+ Ke8 Qc8+ Qd8 Qxc6+ Qd7 Qa8+ Qd8 Qg2 Qd7 Kh2 Qd6+ Kh1 b4 Qa8+ Qd8 Qxd8+ Kxd8 c4 Rf5 Rh8+ Re8 Rxe8+ Kxe8 Rxa7 Rxg5 Kh2 Kd8  96% tb: 2
 24  +0.92  278.9M  13:04.37  Bd2 g6 Bxe6 fxe6 Rf6 Qh7 Qxh7+ Kxh7 a4 bxa4 Rxa4 Bb8 Rb4 Rxf6 gxf6 g5 f7 Rf8 Rb7 Kg6 Kg2 a5  89% tb: 2
 24  +0.58  205.8M  9:33.35  Bd2 g6 Bxe6 fxe6 Rf6 Qh7 Qxh7+ Kxh7 a4 bxa4 Rxa4 Bb8 Rb4 Rxf6 gxf6 g5 f7 Rf8 Rb7 Kg6 Kg2 a5  80% tb: 2
Parent - - By Akbarfan (***) Date 2011-11-14 22:09 Edited 2011-11-14 22:16

> extraordinary move, which leads to a big advantage?


can you show us the extraordinary move, which leads to a big advantage?

it seems Ba3 is not the move that leads to big advantage.
Parent - - By MoKy (**) [sk] Date 2017-12-25 15:11
[FEN "4rrk1/p2q1pp1/2pbb3/1p4P1/3P3Q/1BP2R2/P7/R1B3K1 w - - 0 23"]
[SetUp "1"]

23. Ba3 {!} 23...Bxb3 24. Bxd6 Qxd6 25. Rh3 f5 26. axb3 Re7 27. Qh7+ Kf7 28. Qxf5+ Ke8 29. Qc8+
Qd8 30. Qxc6+ Qd7 31. Qxd7+ Rxd7 32. b4 {+⁠−}
Parent - - By Akbarfan (***) Date 2017-12-26 17:15 Edited 2017-12-26 17:20
Like I said, no big advantage, on the contrary,

After 22...Rae8, start with your PV endposition:

Analysis by Houdini 6.02 Pro x64-pext: 3 cores, depth 39, 8Gb Hash

1. +/- (0.90): 32.Rg3 Rf5 33.Kg2 Kf7 34.Ra6 g6 35.b4 Rc7 36.Kh3 Re7 37.Rc6 Kg7 38.Rc8 Kf7 39.Rc5 Re1 40.Rc7+ Re7 41.Rxe7+ Kxe7 42.Kg4 Rf1 43.Rh3 Ke6 44.Rh6 Rg1+
2. +/- (0.77): 32.b4 Rf5 33.Rg3 Kf7 34.Ra6 g6 35.Kg2 Rc7 36.Rd6 Kg7 37.Re6 Kf7 38.Ra6 Kg7 39.Kh3 Re7 40.Rc6 Kf7 41.Rc5 Re1 42.Rc7+ Re7 43.Rxe7+ Kxe7 44.Kg4 Rf1

White has an small advantage of +0.90 according to H6

Now after 22...Bxb3

23.axb3 Rfe8 24.Rh3 Kf8 25.g6 f6 26.Qh8+ Ke7 27.Qxg7+ Kd8 28.Qxd7+ Kxd7 29.Rh7+ Ke6 and now 30.Raxa7! Rxa7
31.Rxa7 Kf5 32.g7 Kg6 33.Kf2 Rg8 34.Ra6 Rxg7 35.Rxc6
[Event "?"]
[Site "?"]
[White "One neat Move"]
[SetUp "1"]
[FEN "r4rk1/p2q1pp1/2pbb3/1p4P1/3P3Q/1BP2R2/P7/R1B3K1 b - - 0 22"]

22... Bxb3 23. axb3 Rfe8 24. Rh3 Kf8 25. g6 f6 26. Qh8+ Ke7
27. Qxg7+ Kd8 28. Qxd7+ Kxd7 29. Rh7+ Ke6 30. Raxa7 $1 Rxa7 31. Rxa7
Kf5 32. g7 Kg6 33. Kf2 Rg8 34. Ra6 Rxg7 35. Rxc6


Analysis by Houdini 6.02 Pro x64-pext: depth 44

1. +- (2.65): 35.Rxc6 Bh2 36.Rc5 b4 37.c4 Kf7 38.Rc6 Bg1+ 39.Kf3 Bxd4 40.Rc7+ Kg6 41.Rxg7+ Kxg7 42.Bd2 Kf7 43.Bxb4 Ke6 44.Bd2 Ba1
2. = (0.12): 35.Kf3 Rc7 36.Kg4 Bh2 37.Be3 Re7 38.Bf2 Re6 39.Kf3 Kf5 40.c4 bxc4 41.Ra5+ Kg6 42.bxc4 Bc7 43.Ra7 Bb8 44.Ra6 Kf5 45.Ra5+

White has an advantage of +2.65

22...Bxb3 ist more badly as ...Rae8, gives much bigger adv. to white, so ...Rae8 isn't any worse as claimed by you.
Parent - By Banned for Life (Gold) Date 2017-12-27 02:03
Did he really take 6+ years to respond to your previous post? :lol: I think he is counting on winning the argument by outliving you!!! :razz:
Parent - By MoKy (**) [sk] Date 2018-01-01 03:34
6 years later you still don't have a good engine for rook endgames :o)


[FEN "4kr2/p2r2p1/8/1p4P1/3P4/1PP4R/8/R5K1 w - - 0 32"]

32. b4 Rf5 33. Rg3 Kf7 34. Ra6 g6 35. Kg2 Rc7 36. Kh3 Kg7 37. Kg4 Re7 38. Rc6
Re4+ 39. Kh3 Re7 40. Rc5 Re1 41. Rc7+ Rf7 42. Rxf7+ Kxf7 43. Rf3+ Ke7 44. Kg4
Rg1+ 45. Rg3 Rf1 46. Rh3 Ke6 47. Rh6 Rg1+ 48. Kf4 Rf1+ 49. Ke4 Re1+ 50. Kd3
Kf5 51. Rh7 a6 52. Rf7+ Kxg5 53. d5
Parent - - By Xaggard (**) Date 2011-11-15 18:59
FEN:
4rrk1/p2q1pp1/2pbb3/1p4P1/3P3Q/1BP2R2/P7/R1B3K1 w - - 0 23


Strelka_5.1x64:
...
  18  00:15,150    32 277 455  2 137 013  +0,78  23.Be3 Bxb3 24.axb3 Qe6 25.Rh3 Qxe3+ 26.Rxe3 Rxe3 27.Kg2 Rg3+ 28.Kf2 Rxc3 29.Qe4 c5 30.Rh1 g6 31.Ke2 c4 32.bxc4 bxc4 33.d5 Rb8 34.Rh8+ Kxh8 35.Qd4+ Kg8 36.Qxc3 Re8+ 37.Kf3 Re5 38.Qxc4 Rxg5 39.Qc8+ Kg7 40.Qc3+ f6
  19  00:18,060    38 891 920  2 159 102  +0,78  23.Be3 Bxb3 24.axb3 Qe6 25.Rh3 Qxe3+ 26.Rxe3 Rxe3 27.Kg2 Rg3+ 28.Kf2 Rxc3 29.Qe4 c5 30.Rh1 g6 31.Ke2 c4 32.bxc4 bxc4 33.d5 Rb8 34.Rh8+ Kxh8 35.Qd4+ Kg8 36.Qxc3 Re8+ 37.Kf3 Re5 38.Qxc4 Rxg5 39.Qc8+ Kg7 40.Qc3+ f6
  19  01:34,601   211 060 797  2 232 124  +2,69  23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5 26.axb3 Re7 27.Qh7+ Kf7 28.Qxf5+ Ke8 29.Qc8+ Qd8 30.Qxc6+ Qd7 31.Qa8+ Qd8 32.Qh1 Qc8 33.Qg2 Kd8 34.g6 Qb7 35.Qg5 Qe4 36.d5 Kc8 37.d6 Re5 38.Qg2 Qxg2+ 39.Kxg2 Rg5+ 40.Rg3
  20  01:57,050   263 885 286  2 255 371  +2,67  23.Ba3 Bxb3 24.Bxd6 Qxd6 25.Rh3 f5 26.axb3 Re7 27.Qh7+ Kf7 28.Qxf5+ Ke8 29.Qc8+ Qd8 30.Qxc6+ Qd7 31.Qa8+ Qd8 32.Qg2 Qd7 33.Kh1 Qb7 34.Qxb7 Rxb7 35.Kg2 Re7 36.Rf3 Rxf3 37.Kxf3 Rc7 38.Ke4 Kd8 39.Kd3 Rf7 40.Ra6 Rf3+ 41.Ke4 Rxc3 42.Rxa7

Only 1.5 min for Strelka to find this move! :cool:
Parent - - By Barnard (Bronze) Date 2011-11-15 19:57
try to analise the same position with Houdini 2.0...and see if obtain the same result...i can bet that it will without putting it to analice the position
Parent - - By Xaggard (**) Date 2011-11-17 16:53
FEN:
4rrk1/p2q1pp1/2pbb3/1p4P1/3P3Q/1BP2R2/P7/R1B3K1 w - - 0 23


Houdini 2.0b x64:
...
18/46  00:07,365    17 744 372  2 430 000  +0,09  23.Bd2 g6 24.Bxe6 fxe6 25.Rf6 Qh7 26.Qxh7+ Kxh7 27.a4 bxa4 28.Rxa4 Bb8 29.Rxf8 Rxf8 30.Ra6 Rc8 31.Kg2 Kg7 32.Kf3 e5 33.dxe5 Bxe5 34.Rxa7+ Rc7 35.Rxc7+ Bxc7 36.Be3 Kf7 37.Ke4 Bd8 38.c4 Ke6
19/46  00:10,347    25 133 472  2 444 000  +0,09  23.Bd2 g6 24.Bxe6 fxe6 25.Rf6 Qh7 26.Qxh7+ Kxh7 27.a4 bxa4 28.Rxa4 Bb8 29.Rxf8 Rxf8 30.Ra6 Rc8 31.Kg2 Kg7 32.Kf3 e5 33.dxe5 Bxe5 34.Rxa7+ Rc7 35.Rxc7+ Bxc7 36.Be3 Kf7 37.Ke4 Bd8 38.c4 Ke6
19/50+  00:22,147    55 793 767  2 524 000  +0,16  23.Ba3
19/50+  00:26,182    65 994 024  2 526 000  +0,29  23.Ba3
19/52  00:34,472    87 511 209  2 543 000  +0,29  23.Ba3 Bxa3 24.Bxe6 Qxe6

22 sec at a single core :cool:
Parent - - By Barnard (Bronze) Date 2011-11-18 21:40
5 times faster than Strelka :smile:
Parent - - By Master Om (Bronze) [in] Date 2011-11-19 17:10 Edited 2011-11-19 17:18
Fastest is Zappa Crazy II

New game
4rrk1/p2q1pp1/2pbb3/1p4P1/3P3Q/1BP2R2/P7/R1B3K1 w - - 0 1


Analysis by Zappa Mexico II x64 Crazy:

23.Bb2 Qe7 24.Bxe6 fxe6 25.Rh3 Rf5 26.Qh8+ Kf7 27.Qh5+ Kf8 28.Qh8+
  =  (0.00)   Depth: 9/37   00:00:00  1286kN
23.Bb2 Qe7 24.Bxe6 fxe6 25.Rh3 Rf5 26.Qh8+ Kf7 27.Qh5+ Kf8 28.Qh8+
  =  (0.00)   Depth: 9/37   00:00:00  1337kN
23.Bb2 Be7 24.Bxe6 Qxe6 25.Rh3 f5 26.Qh7+ Kf7 27.Rf1 Bxg5 28.Rg3 Be3+
  +/=  (0.47)   Depth: 10/39   00:00:01  4899kN
23.Bb2 Be7 24.Bxe6 Qxe6 25.Rh3 f5 26.Qh7+ Kf7 27.Rf1 Bxg5 28.Rg3 Be3+
  +/=  (0.47)   Depth: 10/39   00:00:01  4975kN
23.Bb2 g6 24.Raf1 Bxb3 25.Rh3 Qxh3 26.Qxh3 Bc4 27.Qd7 Bxf1 28.Kxf1 Be7 29.Qxc6
  =  (-0.05)   Depth: 11/39   00:00:02  6909kN
23.Bb2 g6 24.Raf1 Bxb3 25.Rh3 Qxh3 26.Qxh3 Bc4 27.Qd7 Bxf1 28.Kxf1 Be7 29.Qxc6
  =  (-0.05)   Depth: 11/41   00:00:02  8766kN
23.Bb2 g6 24.Raf1 c5 25.Bxe6 fxe6 26.Rf6 Rxf6 27.Rxf6 Qh7 28.Qxh7+ Kxh7
  =  (-0.01)   Depth: 12/43   00:00:03  12318kN
23.Bd2 g6 24.Raf1 c5 25.Bxe6 fxe6 26.Rf6 Qh7 27.Qxh7+ Kxh7 28.d5 Rxf6 29.Rxf6
  =  (0.14)   Depth: 12/43   00:00:04  15207kN
23.Ba3 Bf5 24.Bxd6 Re4 25.Qh2 Rfe8 26.Be5 Rg4+ 27.Rg3
  +-  (1.53)   Depth: 12/43   00:00:08  33179kN
23.Ba3 Bf5 24.Bxd6 Re4 25.Qh2 Rfe8 26.Be5 Rg4+ 27.Rg3
  +-  (1.53)   Depth: 12/43   00:00:08  33301kN
23.Ba3 Bxb3 24.axb3 Re6 25.Rh3 f5 26.Qh5 b4 27.g6 Rxg6+ 28.Qxg6 bxa3 29.Qh7+ Kf7 30.Re1 f4
  +-  (1.68)   Depth: 13/45   00:00:10  44289kN
23.Ba3 Bxb3 24.axb3 Re6 25.Rh3 f5 26.Qh5 b4 27.g6 Rxg6+ 28.Qxg6 bxa3 29.Qh7+ Kf7 30.Re1 f4
  +-  (1.68)   Depth: 14/45   00:00:11  45756kN
23.Ba3 Bxb3 24.axb3 Re6 25.Rh3 f5 26.Qh5 b4 27.g6 Rxg6+ 28.Qxg6 bxa3 29.Qh7+ Kf7 30.Re1 f4
  +-  (1.68)   Depth: 14/45   00:00:13  57151kN
23.Ba3 Bxb3 24.axb3 Re6 25.Rh3 f5 26.Qh5 b4 27.g6 Rxg6+ 28.Qxg6 bxa3 29.Qh7+ Kf7 30.Re1 f4
  +-  (1.68)   Depth: 14/45   00:00:14  60089kN

(Prakash, Bhubaneswar 19.11.2011)

New game
4rrk1/p2q1pp1/2pbb3/1p4P1/3P3Q/1BP2R2/P7/R1B3K1 w - - 0 1


Analysis by Zap!Chess Reykjavik:

23.Be3
  -+  (-1.69)   Depth: 6/20   00:00:00
23.Be3 g6 24.Raf1 Bf5 25.R1f2 Qe7 26.a4 bxa4 27.Bxa4
  -/+  (-1.25)   Depth: 8/25   00:00:00  447kN
23.Be3 c5 24.Bxe6 Qxe6 25.Rh3 Qxe3+ 26.Rxe3 Rxe3 27.c4 bxc4 28.dxc5 Bxc5 29.Qxc4
  =/+  (-0.52)   Depth: 9/27   00:00:00  1265kN
23.Be3 c5 24.Bxe6 Qxe6 25.Rh3 Qxe3+ 26.Rxe3 Rxe3 27.c4 bxc4 28.dxc5 Bxc5 29.Qxc4
  =/+  (-0.52)   Depth: 9/27   00:00:00  1380kN
23.Be3 c5 24.Bxe6 Qxe6 25.Rh3 Qxe3+ 26.Rxe3 Rxe3 27.c4 b4
  =/+  (-0.54)   Depth: 10/29   00:00:01  1846kN
23.Be3 c5 24.Bxe6 Qxe6 25.Rh3 Qxe3+ 26.Rxe3 Rxe3 27.c4 b4
  =/+  (-0.54)   Depth: 10/29   00:00:01  2085kN
23.Be3 g6 24.Raf1 Bc7 25.Bxe6 Qxe6 26.Rh3 Qxe3+ 27.Rxe3 Rxe3 28.Rc1
  =  (-0.14)   Depth: 11/34   00:00:02  6343kN
23.Be3 g6 24.Raf1 Bc7 25.Bxe6 Qxe6 26.Rh3 Qxe3+ 27.Rxe3 Rxe3 28.Rc1
  =  (-0.14)   Depth: 11/34   00:00:02  6708kN
23.Be3 Bxb3 24.axb3 Qe7 25.Rh3 Qxe3+ 26.Rxe3 Rxe3 27.Rxa7 Rxc3 28.Qe4 Bb8
  =  (0.22)   Depth: 12/34   00:00:03  12387kN
23.Be3 Bxb3 24.axb3 Qe7 25.Rh3 Qxe3+ 26.Rxe3 Rxe3 27.Rxa7 Rxc3 28.Qe4 Bb8
  =  (0.22)   Depth: 12/34   00:00:04  13234kN
23.Be3 g6 24.Qh6 Bxb3 25.axb3 Qg4+ 26.Kf2 Qh5 27.Qxh5 gxh5 28.Rf6 Rd8 29.Rxa7 Kg7
  +/=  (0.31)   Depth: 13/35   00:00:08  27868kN
23.Ba3
  +/=  (0.32)   Depth: 13/37   00:00:14  51367kN
23.Ba3 Bxa3 24.Kf2 Bxb3 25.Rh1 f6 26.g6 Re2+ 27.Kxe2 Qe8+ 28.Kd2 Qxg6 29.axb3 Re8 30.Qh5 Qxh5 31.Rxh5
  +/=  (0.49)   Depth: 13/38   00:00:16  57764kN
23.Ba3 Bxa3 24.Kf2 Bxb3 25.Rh1 f6 26.g6 Re2+ 27.Kxe2 Qe8+ 28.Kd2 Qxg6 29.axb3 Re8 30.Qh5 Qxh5 31.Rxh5
  +/=  (0.49)   Depth: 13/38   00:00:16  58271kN
23.Ba3 Bxa3 24.Kf2 Bxb3 25.Rh1 f6 26.axb3 Qe6 27.Qh7+ Kf7 28.g6+ Ke7 29.Re3 Qxe3+ 30.Kxe3 Kd8+ 31.Kf4 Rh8
  +/-  (1.31)   Depth: 14/38   00:00:26  93956kN
23.Ba3 Bxa3 24.Kf2 Bxb3 25.Rh1 f6 26.axb3 Qe6 27.Qh7+ Kf7 28.g6+ Ke7 29.Re3 Qxe3+ 30.Kxe3 Kd8+ 31.Kf4 Rh8
  +/-  (1.31)   Depth: 14/38   00:00:27  98938kN

(Prakash, Bhubaneswar 19.11.2011)
Parent - - By Barnard (Bronze) Date 2011-11-20 00:23
Zappa Crazy is a personality of Zappa Mexico 2?
Parent - - By Master Om (Bronze) [in] Date 2011-11-20 02:27
:wink:
Parent - - By Barnard (Bronze) Date 2011-11-20 02:37
looks interesting...im tempted to tell you to play a correspondence game,maybe when i will finish my games?
Parent - - By Master Om (Bronze) [in] Date 2011-11-20 02:40
I am ready But y u r tempted ?
Parent - - By Barnard (Bronze) Date 2011-11-20 02:43
i told 'im tempted' because im runing 4 games here,and more games at LSS,and all the games just with a old dual core...if i start mre chess games,i wont be able to play a good chess,that is why im 'tempted',but i think is more reasonable to wait until i finish some of my games
Parent - By Master Om (Bronze) [in] Date 2011-11-20 03:55
No Probs. :lol:
Up Topic The Rybka Lounge / Test Positions / One neat move

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