Author: Uri Blass
Date: 01:15:50 12/24/01
Go up one level in this thread
On December 24, 2001 at 03:23:51, Christophe Theron wrote: >On December 24, 2001 at 00:23:18, Sune Larsson wrote: > >> >> [D]8/k1p5/P7/8/2K4p/1p4rP/6P1/1R6 w - - 0 47 >> >> >> This is a possible position from the first game Gambit Tiger - IM Berg. >> While playing out different endings vs Tiger, I stumbled upon this little >> intermezzo. Previous moves were: 45.-Nxc4 46.Kxc4 h4 /diagram. >> >> Tiger here ponders on and plays 47.Rxb3, with an eval of -0.78 - just to >> find itself in the misery of -11.36, a single move later... >> >> I played out this ending on a PIII 800, 192 Mb hash, 1 hour per player. >> >> Would have made a great testposition, but after the better 47.Kb5 black >> just have to find 47.-Rg8! 48.Kc6 Rb8! which also wins. >> >> For a human it's easy to see that a move like 47.Rxb3 loses quickly for >> white, but Tiger - (and maybe other programs) - has clear problems here. > > > >The current version of Tiger (14.8) avoids Rxb3 after 19 seconds on my K6-2 >450MHz. > >However it avoids it in favour of another move without seeing that Rxb3 is >losing so badly. > >I suspect other programs avoid it also for the wrong reasons. You need to >compute at least 20 plies after Rxb3 Rxb3 to see that it is losing, and it's >very difficult to go that deep in the start position. Yace(probably the best program for pawn endgames) does not agree with you. It needs 19 plies after trading rooks to see the disaster and it needs only 16 plies from the root position to see the disaster and change it's mind(I think that evaluation of 3.00 pawns against itself is enough to say that it avoided Rxb3 for the right reason) yace was slowed down by a significant factor in the first seconds so you can substract 25 seconds from the time to see the correct time. Yace used 64 mbytes hash tables on p800 (It happens to me often on the p800 when program under chessbase interface are slowed down only in the first seconds and I suspect that it is a problem of windows2000. It can happen also with Deep fritz when I try to use 64 Mbytes hash tables) New position [D]8/k1p5/P7/8/2K4p/1p4rP/6P1/1R6 w - - 0 1 Analysis by Yace 0.99.56: 1.Rxb3 Rxb3 2.Kxb3 Kxa6 = (0.05) Depth: 1 00:00:08 1.Rxb3 Rxb3 2.Kxb3 Kxa6 = (0.05) Depth: 2 00:00:08 1.Rxb3 Rxb3 2.Kxb3 Kxa6 = (0.05) Depth: 3 00:00:08 1.Rxb3 Rxg2 2.Ra3 Rg3 3.Rxg3 = (-0.16) Depth: 4 00:00:08 1.Rxb3 Rxg2 2.Kc5 Kxa6 3.Kc6 Rc2+ 4.Kd5 ³ (-0.69) Depth: 5 00:00:09 3kN 1.Rxb3 Rxg2 2.Kc5 Kxa6 3.Rb4 Rg5+ 4.Kc6 µ (-0.72) Depth: 5 00:00:09 5kN 1.Rxb3 Rxg2 2.Re3 Rc2+ 3.Kd3 Ra2 4.Re4 Ra3+ 5.Kd4 ³ (-0.62) Depth: 6 00:00:12 13kN 1.Rxb3 Rxg2 2.Ra3 Rg3 3.Ra5 Rxh3 4.Kd4 Rf3 µ (-0.74) Depth: 7 00:00:18 53kN 1.Rxb3 Rxg2 2.Ra3 Rg3 3.Ra4 Rxh3 4.Kd5 Re3 5.Kc6 µ (-0.78) Depth: 8 00:00:20 75kN 1.Rxb3 Rxg2 2.Ra3 Rg3 3.Ra4 Rxh3 4.Kd5 Rd3+ 5.Ke4 Rd6 6.Kf3 Rxa6 7.Rxh4 µ (-0.85) Depth: 9 00:00:24 167kN 1.Rxb3 Rxg2 2.Rb4 Rg3 3.Kd5 Rg2 ³ (-0.45) Depth: 10 00:00:25 258kN 1.Rxb3 Rxb3 2.Kxb3 Kxa6 3.Kc4 Kb6 4.Kd4 Kb5 5.Kd5 c6+ 6.Kd4 Kb4 7.Ke4 Kc3 8.Ke5 = (-0.01) Depth: 10 00:00:25 478kN 1.Rxb3 Rxb3 2.Kxb3 Kxa6 3.Kc4 Kb6 4.Kd4 c5+ 5.Kc3 Kc6 6.Kc4 Kd6 7.Kc3 Kd5 8.Kd3 Ke5 ³ (-0.41) Depth: 11 00:00:26 523kN 1.Rxb3 Rxb3 2.Kxb3 Kxa6 3.Kc4 Kb6 4.Kd3 c5 5.Kc4 Kc6 6.Kc3 Kb5 7.Kd2 c4 8.Kd1 Kc6 9.Kc2 Kd6 10.Kc3 ³ (-0.45) Depth: 11 00:00:26 624kN 1.Rxb3 Rxb3 2.Kxb3 Kxa6 3.Kc4 Kb6 4.Kd3 c5 5.Kc4 Kc6 6.Kc3 Kb5 ³ (-0.47) Depth: 12 00:00:28 831kN 1.Rxb3 Rxb3 2.Kxb3 Kxa6 3.Kc4 Kb6 4.Kd3 c5 5.Ke2 c4 6.Kd2 Kb5 7.Kc3 Kc5 ³ (-0.43) Depth: 13 00:00:31 1320kN 1.Rxb3 Rxb3 2.Kxb3 Kxa6 3.Kc4 Kb6 4.Kd3 Kb5 5.Ke2 c5 6.Kd3 c4+ 7.Kd2 Kb4 8.Ke1 Kb5 9.Kd1 c3 10.Kc2 Kc4 11.Kb1 Kb4 12.Ka2 Kc4 13.Ka3 Kd4 14.Kb3 Kd3 15.g4 ³ (-0.41) Depth: 14 00:00:35 1970kN 1.Rxb3 Rxb3 2.Kxb3 Kxa6 3.Kc4 Kb6 4.Kd3 Kb5 5.Kd4 c5+ 6.Kd3 c4+ 7.Kd2 Kb4 8.Kd1 c3 9.Kc1 Kb3 10.Kb1 Ka3 11.Kc1 Ka4 µ (-0.81) Depth: 15 00:00:37 2396kN 1.Rxb3 Rxb3 2.Kxb3 Kxa6 3.Kc4 Kb6 4.Kb4 c6 5.Kb3 Kb5 6.Ka3 c5 7.Kb2 Kb4 8.Ka1 c4 9.Kb2 c3+ 10.Kc2 Kc4 11.Kd1 Kb3 12.Ke2 c2 13.g4 hxg3 14.Kd2 c1Q+ 15.Kxc1 -+ (-1.60) Depth: 15 00:00:39 2530kN 1.Rb2 Rxg2 2.Rxg2 Kb6 -+ (-1.59) Depth: 15 00:00:42 3077kN 1.Rb2 Kxa6 2.Kc5 Kb7 3.Kb5 Rc3 4.Ra2 -+ (-1.60) Depth: 15 00:00:48 5502kN 1.Rxb3 Rxb3 2.Kxb3 Kxa6 3.Kc4 Kb6 4.Kb4 c6 5.Kb3 Kb5 6.Ka3 c5 7.Kb2 Kb4 8.Ka1 c4 9.Kb2 c3+ 10.Kc2 Kc4 11.Kd1 Kb3 12.Ke2 c2 13.g4 hxg3 14.Kd2 c1Q+ 15.Kxc1 -+ (-1.60) Depth: 15 00:00:48 5502kN 1.Rxb3 Rxb3 2.g4 hxg3 3.Kxb3 g2 4.h4 g1Q 5.h5 -+ (-2.00) Depth: 16 00:01:10 14587kN 1.Rxb3 Rxb3 2.Kc5 -+ (-3.00) Depth: 16 00:01:12 14599kN 1.Rxb3 Rxb3 2.Kxb3 Kxa6 3.Kc4 Kb6 4.Kd3 c5 5.Ke2 Ka7 6.Kf3 Kb8 7.g4 c4 8.g5 c3 9.g6 c2 10.g7 c1Q 11.g8Q+ Ka7 -+ (-3.00) Depth: 16 00:01:21 15672kN 1.Rb2 Kxa6 -+ (-2.99) Depth: 16 00:01:22 15859kN 1.Rb2 Kxa6 2.Kb4 Rg5 3.Kc4 Rb5 4.Kd3 Kb7 5.Ke3 c5 6.Kd3 Kb6 7.Kc3 Kc6 8.Rd2 Rb4 9.Kb2 Kb6 -+ (-1.74) Depth: 16 00:01:34 20354kN 1.Kc5 Kxa6 2.Ra1+ Kb7 3.Rb1 Rxg2 4.Rxb3+ Ka8 5.Rb4 Rg3 6.Rxh4 Rg5+ 7.Kd4 c5+ 8.Ke3 Rg3+ 9.Kf4 c4 -+ (-1.73) Depth: 16 00:02:00 29252kN 1.Kc5 Kxa6 2.Ra1+ Kb7 3.Rb1 Ka6 4.Ra1+ Kb7 5.Rb1 Ka6 -+ (-1.72) Depth: 16 00:02:08 33035kN 1.Kb5 Rg6 2.Kc4 Rb6 3.Rb2 Kxa6 4.Kc5 Rb5+ 5.Kc6 Rb4 6.Kxc7 Rd4 -+ (-1.71) Depth: 16 00:02:23 39229kN 1.Kb5 Rg6 2.Kc4 Rb6 3.Rb2 Kxa6 4.Kc5 Rb5+ 5.Kc6 Rb7 6.Kd5 Rb4 7.Kc5 Rb6 8.Kd5 c5 9.Kxc5 Ka7 -+ (-1.67) Depth: 16 00:02:37 45512kN 1.Kb5 Rg6 2.Kc4 Rb6 3.Rb2 Kxa6 4.Kc5 Ka5 5.Rb1 b2 6.Kc4 Rb4+ 7.Kc3 c5 8.Kc2 Ka4 9.Kc3 Rb3+ 10.Kc2 Rb5 -+ (-1.86) Depth: 17 00:03:08 56834kN 1.Kc5 Kxa6 2.Ra1+ Kb7 3.Rb1 Rxg2 4.Rxb3+ Ka8 5.Rb4 Rg3 6.Rxh4 Rb3 -+ (-1.85) Depth: 17 00:03:37 66635kN (Blass, Tel-aviv 24.12.2001) yace after trading rooks with no learing from the initial position (again yace was slowed down in the first seconds) New position 8/k1p5/P7/8/7p/1K5P/6P1/8 b - - 0 1 Analysis by Yace 0.99.56: 2...Kxa6 = (0.05) Depth: 1 00:00:04 2...Kxa6 3.g4 +- (1.81) Depth: 2 00:00:04 2...c5 3.g4 Kxa6 +- (1.55) Depth: 2 00:00:04 2...c5 3.g4 +- (1.55) Depth: 2 00:00:04 2...c5 3.Kc4 Kxa6 +- (1.46) Depth: 3 00:00:04 2...Kxa6 3.Kc4 c6 = (0.20) Depth: 3 00:00:04 2...Kxa6 3.Kc4 Kb6 4.g4 ± (1.06) Depth: 4 00:00:04 2...Kxa6 3.Kc4 Kb6 4.Kc3 c5 5.g4 ² (0.70) Depth: 6 00:00:04 2...Kxa6 3.Kc4 Kb6 4.Kc3 c5 5.g4 ² (0.70) Depth: 6 00:00:04 2...Kxa6 3.Kc4 Kb6 4.Kc3 c5 5.g4 ² (0.70) Depth: 6 00:00:04 2...Kxa6 3.Kc4 Kb6 4.Kd3 c5 5.g4 ± (0.78) Depth: 6 00:00:04 2...Kxa6 3.Kc3 Kb6 4.Kc4 Ka6 5.Kd5 Kb6 ² (0.33) Depth: 7 00:00:04 1kN 2...Kxa6 3.Kc4 Kb6 4.Kd4 c5+ 5.Kd5 Kb5 = (-0.03) Depth: 7 00:00:04 1kN 2...Kxa6 3.Kc4 Kb6 4.Kd4 Kb7 5.Kd5 Kc8 6.Ke5 ² (0.39) Depth: 8 00:00:04 4kN 2...Kxa6 3.Kc4 Kb6 4.Kd4 c5+ 5.Kd5 Kb5 6.g4 ± (0.81) Depth: 8 00:00:04 5kN 2...Kxa6 3.Kc3 Kb5 4.Kb2 c5 5.Kc1 Kb6 6.Kd1 Kc6 7.Kd2 c4 ² (0.41) Depth: 9 00:00:04 7kN 2...Kxa6 3.Kc4 Kb6 4.Kd5 Kb5 5.Ke4 c5 6.Ke5 Kc4 = (-0.25) Depth: 9 00:00:05 7kN 2...Kxa6 3.Kc4 Kb6 4.Kd5 Kb5 5.Ke4 Ka5 6.Ke5 Kb5 7.Kf5 = (0.15) Depth: 10 00:00:05 14kN 2...Kxa6 3.Kc4 Kb6 4.Kd5 c5 5.Ke4 Kc6 6.Kf4 Kd5 7.g4 ² (0.40) Depth: 10 00:00:05 14kN 2...Kxa6 3.Kc3 Kb5 4.Kd4 c5+ 5.Ke5 Kc4 6.Kf4 Kd4 7.Kg4 c4 8.Kxh4 = (-0.01) Depth: 11 00:00:05 20kN 2...Kxa6 3.Kc4 Kb6 4.Kd4 c5+ 5.Kd5 Kb5 6.Ke4 Kb4 7.Ke3 c4 ³ (-0.39) Depth: 11 00:00:06 20kN 2...Kxa6 3.Kc4 Kb6 4.Kd4 c5+ 5.Kd5 Kb5 6.Ke4 c4 7.Kd4 Kb4 8.Ke4 c3 9.Kd3 Kb3 ³ (-0.58) Depth: 12 00:00:06 40kN 2...Kxa6 3.Kc4 Kb6 4.Kd4 c5+ 5.Kd5 Kb5 6.Ke4 c4 7.Kd4 Kb4 8.Ke4 Kc5 9.Kf4 c3 10.Ke3 Kb4 11.Kd3 Kb5 12.Kxc3 Kc5 13.Kd3 Kd5 14.g3 hxg3 15.Ke3 g2 16.Kf2 g1Q+ 17.Kxg1 µ (-0.71) Depth: 13 00:00:07 55kN 2...Kxa6 3.Kc4 Kb6 4.Kd4 c5+ 5.Kd5 Kb5 6.Ke4 c4 7.Kd4 Kb4 8.Ke3 Kb3 9.Kd2 c3+ 10.Kc1 Ka4 µ (-0.71) Depth: 14 00:00:08 72kN 2...Kxa6 3.Kc4 Kb6 4.Kd5 c5 5.Ke5 Ka5 6.Kf4 c4 7.Ke3 Kb5 8.Kd2 Kb4 9.Ke2 Kc5 10.Kd1 Kb6 11.Ke2 Ka5 12.Ke3 Kb5 13.Kd2 Kb4 14.Ke2 Kc5 15.Kd1 Kb6 16.Ke2 Ka5 17.Ke3 ³ (-0.63) Depth: 15 00:00:10 106kN 2...Kxa6 3.Kc4 Kb6 4.Kd5 c5 5.Ke5 Ka5 6.Kd5 Kb5 7.Ke4 c4 8.Ke3 Ka4 9.Kd2 Ka5 10.Kc3 Kb5 11.Kb2 Kb6 12.Kc3 Kc5 13.Kb2 Kc6 14.Kc2 Kd6 15.Kd2 Kc5 16.Kc3 Kd5 17.Kb4 Kd4 µ (-0.71) Depth: 16 00:00:11 145kN 2...Kxa6 3.Kc4 Kb6 4.Kd5 c5 5.Ke5 Ka5 6.Kd5 Kb5 7.Ke4 c4 8.Ke3 Ka4 9.Kd2 Ka5 10.Kc3 Kb5 11.Kb2 Kb6 12.Kc3 Kc5 13.Kb2 Kc6 14.Kc2 Kd6 15.Kd2 Kc5 16.Kc3 Kd5 17.Kb4 µ (-0.71) Depth: 16 00:00:11 145kN 2...Kxa6 3.Kc4 Kb6 4.Kd5 c6+ 5.Kc4 c5 6.Kd3 Kb5 7.Kd2 c4 8.Kc3 Kc5 9.Kb2 Kb4 10.Kc2 c3 11.Kc1 Kc4 12.Kc2 Kd4 13.Kc1 Kc5 14.Kb1 Kb4 15.Kc1 Kc4 16.Kc2 Kd4 17.Kc1 Kc5 µ (-0.93) Depth: 17 00:00:13 183kN 2...Kxa6 3.Kc4 Kb6 4.Kd5 c6+ 5.Kc4 c5 6.Kd3 Kb5 7.Kd2 c4 8.Kc3 Kc5 9.Kb2 Kb4 10.Kc2 c3 11.Kc1 Kc4 12.Kc2 Kd4 13.Kc1 Kc5 14.Kb1 Kb4 15.Kc1 Kc4 16.Kc2 Kd4 17.Kc1 µ (-0.93) Depth: 17 00:00:13 183kN 2...Kxa6 3.Kc4 Kb6 4.Kd4 Kb5 5.Kd3 c5 6.Kc3 c4 7.Kb2 Kb4 8.Ka2 Kc3 9.Kb1 Kd4 10.Kc1 c3 11.Kc2 Kc4 12.Kc1 Kc5 13.Kd1 Kb4 14.Kc1 Kc4 15.Kc2 Kd4 16.Kb1 Ke3 17.Kc2 Kd4 µ (-0.93) Depth: 18 00:00:15 232kN 2...Kxa6 3.Kc4 Kb6 4.Kd4 Kb5 5.Kd3 c5 6.Kc3 c4 7.Kb2 Kb4 8.Ka2 Kc3 9.Kb1 Kd4 10.Kc1 c3 11.Kc2 Kc4 12.Kc1 Kc5 13.Kd1 Kb4 14.Kc1 Kc4 15.Kc2 Kd4 16.Kb1 Ke3 17.Kc2 µ (-0.93) Depth: 18 00:00:15 266kN 2...Kxa6 3.Ka3 Kb6 4.Kb2 c6 5.Kc2 Kc5 6.Kc3 Kd5 7.Kb4 c5+ 8.Kb5 Kd4 9.Kc6 c4 10.Kb5 c3 11.Kb4 Kd3 12.Ka3 c2 13.Kb2 Kd2 14.g3 hxg3 15.h4 µ (-1.33) Depth: 19 00:00:17 299kN 2...Kxa6 3.Ka3 Kb6 4.Kb2 Kb5 5.Kc3 Kc5 6.Kd3 Kb4 7.Ke3 c5 8.Ke4 Kb3 9.Kd5 c4 10.Kc6 c3 11.Kd5 c2 12.g3 -+ (-2.34) Depth: 19 00:00:17 299kN 2...Kxa6 3.Kc4 Kb6 4.Kd4 c5+ 5.Kc4 Kc6 6.Kd3 Kb5 7.Ke4 c4 8.Ke3 c3 9.Ke4 c2 10.Ke5 -+ (-4.63) Depth: 19 00:00:19 386kN 2...Kxa6 3.Kc4 Kb6 4.Kd4 c5+ 5.Kc4 Kc6 6.Kc3 Kd5 7.Kd2 Kd4 8.Ke2 Kc3 9.Kf3 c4 10.Ke2 Kb3 11.Ke3 c3 12.Ke4 c2 13.Ke5 -+ (-5.03) Depth: 20 00:00:19 450kN 2...Kxa6 3.Kc4 Kb6 4.Kd5 Kb5 5.Ke6 c5 6.Kf7 Kc4 7.Kg7 Kc3 8.Kf7 c4 9.Kg8 Kd4 10.Kf7 c3 11.Kg6 c2 12.Kh5 c1Q 13.g4 -+ (-6.05) Depth: 20 00:00:19 450kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 Kb5 5.Ke3 c5 6.Kd3 c4+ 7.Ke2 Ka4 8.Kd2 Kb3 9.Ke3 c3 10.Kf4 c2 11.Kg5 Kb4 12.Kg4 Kc4 13.Kg5 -+ (-7.64) Depth: 20 00:00:21 547kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 Kb5 5.Ke3 c5 6.Kd3 c4+ 7.Ke2 c3 8.Ke3 Kb4 9.Ke4 c2 10.Kd3 c1Q 11.g3 -+ (-8.04) Depth: 21 00:00:22 731kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 Kb5 5.Ke3 c5 6.Kd3 c4+ 7.Kc3 Kc5 8.Kd2 Kb4 9.Ke3 c3 10.Kf4 c2 11.Kg4 -+ (-8.64) Depth: 21 00:00:25 1202kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 Kb5 5.Kc3 c5 6.Kb3 c4+ 7.Kc3 Kc5 8.Kb2 Kd4 9.Ka3 c3 10.Kb3 Kd3 11.Ka4 c2 12.Ka3 -+ (-8.74) Depth: 22 00:00:28 1538kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 Kb5 5.Kc3 c5 6.Kb3 c4+ 7.Kc3 Kc5 8.Kc2 Kd4 9.Kd2 c3+ 10.Kc2 Kc4 11.Kc1 Kb3 12.Kd1 c2+ 13.Kd2 Kb2 14.Ke3 -+ (-9.00) Depth: 23 00:00:32 2153kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 Kb5 5.Kc3 c5 6.Kb3 c4+ 7.Ka3 Kc5 8.Ka4 Kd4 9.Kb5 c3 10.Kc6 c2 11.Kd6 c1Q 12.Kd7 -+ (-9.01) Depth: 24 00:00:35 2803kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 Kb5 5.Kc3 c5 6.Kb3 c4+ 7.Ka3 Kc5 8.Ka4 Kd4 9.Kb5 c3 10.Kc6 c2 11.Kc7 -+ (-9.41) Depth: 25 00:00:44 4731kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 Kb5 5.Kc3 c5 6.Kb3 c4+ 7.Ka3 Kc5 8.Ka4 Kd4 9.Ka3 c3 10.Ka2 c2 11.Kb2 Kd3 12.Ka2 c1Q 13.g4 -+ (-10.41) Depth: 25 00:00:48 5585kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 c5 5.Kc4 Kc6 6.Kd3 Kd5 7.Ke3 c4 8.Kf4 c3 9.Ke3 Kc5 10.Ke4 c2 11.Kf4 -+ (-11.36) Depth: 25 00:01:23 14337kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 c5 5.Kc4 Kc6 6.Kd3 Kd5 7.Ke3 c4 8.Kf4 c3 9.Ke3 Kc5 10.Ke4 c2 11.Ke3 c1Q+ 12.Kd3 Qf1+ 13.Kc2 Qxg2+ 14.Kc3 -+ (-11.76) Depth: 26 00:01:37 17722kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 c5 5.Kc4 Kc6 6.Kb3 Kd5 7.Ka4 c4 8.Ka5 c3 9.Ka4 c2 10.Kb3 c1Q 11.g4 -+ (-12.76) Depth: 26 00:01:42 18746kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 c5 5.Kc4 Kc6 6.Kb3 Kd5 7.Ka4 c4 8.Ka5 c3 9.Ka4 c2 10.Ka5 -+ (-17.76) Depth: 26 00:01:47 19853kN 2...Kxa6 3.Kc4 Kb6 4.Kd3 c5 5.Kc4 Kc6 6.Kc3 Kd5 7.Kd3 c4+ 8.Kc3 Kc5 9.Kc2 Kd4 10.Kd2 c3+ 11.Kc2 Kc4 12.Kb1 Kd3 13.Ka2 Ke3 14.Kb3 Kf2 15.Kb4 Kxg2 16.Kb3 Kxh3 17.Kxc3 -+ (-#27) Depth: 26 00:02:55 42581kN 2...Kxa6 3.Kc4 Kb6 4.Kb4 c5+ 5.Kc4 Kc6 6.Kc3 Kd5 7.Kd3 c4+ 8.Kc3 Kc5 9.Kc2 Kd4 10.Kd2 c3+ 11.Kc2 Kc4 12.Kb1 Kd3 13.Kc1 Ke3 14.Kc2 Kf2 15.Kxc3 Kxg2 16.Kd3 Kxh3 17.Ke3 -+ (-#27) Depth: 27 00:03:32 48598kN (Blass, Tel-aviv 24.12.2001) Uri
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