Author: Rafael Andrist
Date: 04:50:34 02/09/03
Go up one level in this thread
On February 09, 2003 at 06:14:26, Steffen Jakob wrote: >in the following position Hossa exchanged the queen against two rooks in a match >with Hiarcs8: > >[D]6k1/5R2/1p1p2p1/p2q4/2p4P/P1P2R2/5PP1/6K1 b - - 0 33 > >It seems as if the pawn endgame after 33... Qxf7 34.Rxf7 Kxf7 is lost for black. >What does your engine say about this? > >[D]8/5k2/6p1/8/1ppP1P1P/8/4K1P1/8 w - - 0 40 Wilhelm prefers exchaning the queen mainly because of its material evaluation, after some time it does not see a big difference (around 0.05 pawns) between Qxf7 and Qe5 and thinks that White has advantage anyway. static evaluation: .46 Searching... ply time value nodes N nodes Q PV 1 0s -0.26 22 10 Qd5xf7 2 0s -0.26 101 63 Qd5xf7 Rf3xf7 3 0s -0.26 375 276 Qd5xf7 Rf3xf7 Kg8xf7 4 0s -0.20 1215 944 Qd5xf7 Rf3xf7 Kg8xf7 Kg1-f1 5 0s -0.32 2673 2091 Qd5xf7 Rf3xf7 Kg8xf7 Kg1-f1 Kf7-e6 6 0s -0.20 6466 3714 Qd5xf7 Rf3xf7 Kg8xf7 Kg1-f1 Kf7-e6 Kf1-e2 7 2s 0.50 184183 100127 Qd5-e5 Kg1-f1 b6-b5 Rf7-a7 Qe5-d5 Ra7-e7 Qd5-d1+ 8 4s 0.50 399226 172747 Qd5-e5 Kg1-f1 b6-b5 Rf7-a7 Qe5-d5 Ra7-e7 Qd5-d1+ Re7-e1! Qd1-d5 9 18s 0.64 1564231 638513 Qd5-e5 Kg1-f1 Qe5-d5 Rf7-f8+ Kg8-g7! Rf3-f7+! Qd5xf7! Rf8xf7+ Kg7xf7! g2-g4 Kf7-e6 h4-h5 g6-g5 10 20s 0.47 1730395 678931 Qd5xf7 Rf3xf7 Kg8xf7 g2-g4 Kf7-f6 Kg1-f1 b6-b5 h4-h5 b5-b4 a3xb4 11 45s 0.70 3963955 1593578 Qd5xf7 Rf3xf7 Kg8xf7 g2-g4 Kf7-f6 a3-a4 d6-d5 h4-h5 d5-d4 c3xd4 b6-b5 12 55s 0.47 4985480 1822110 Qd5xf7 Rf3xf7 Kg8xf7 g2-g4 b6-b5 Kg1-f1 b5-b4 a3xb4 a5xb4 c3xb4 c4-c3 Kf1-e2 13 278s 0.58 22004244 9823424 Qd5xf7 Rf3xf7 Kg8xf7 g2-g4 b6-b5 f2-f4 Kf7-g7 Kg1-f2 b5-b4 c3xb4 a5xb4 a3xb4 Kg7-f6 Wilhelm doen't fear the connected passers, but it is unsure about the right move and variation: 8/5k2/6p1/8/1ppP1P1P/8/4K1P1/8 w - - 0 40 static evaluation: .26 Searching... ply time value nodes N nodes Q PV 1 0s 0.35 13 0 d4-d5 2 0s 0.18 48 7 d4-d5 c4-c3 3 0s 0.18 285 15 d4-d5 b4-b3 Ke2-d2 4 0s 0.37 856 124 g2-g4 b4-b3 f4-f5 b3-b2 5 0s 0.37 2543 307 g2-g4 b4-b3 f4-f5 b3-b2 f5xg6+ 6 0s -0.03 8721 1671 Ke2-d2 Kf7-e6 g2-g4 b4-b3 Kd2-c3 Ke6-d5 7 1s -0.02 21336 3352 Ke2-d2 Kf7-e6 g2-g4 b4-b3 Kd2-c3 Ke6-d5 h4-h5 8 1s 1.07 47268 8706 Ke2-d2 Kf7-e6 g2-g4 Ke6-d5 h4-h5 g6xh5 g4xh5 Kd5xd4 9 1s 1.24 108594 17888 Ke2-d2 Kf7-e6 g2-g4 Ke6-d5 h4-h5 g6xh5 g4xh5 Kd5xd4 h5-h6 10 2s 1.07 202055 32376 g2-g4 Kf7-e6 Ke2-d2 Ke6-d5 h4-h5 g6xh5 g4xh5 Kd5xd4 h5-h6 b4-b3 11 4s 1.08 360366 53814 g2-g4 b4-b3 Ke2-d2 b3-b2 Kd2-c2 c4-c3 h4-h5 Kf7-f6 g4-g5+ Kf6-f7! h5xg6+ Kf7xg6! d4-d5 12 7s 1.17 644069 94588 Ke2-d2 Kf7-e6 g2-g4 Ke6-d5 h4-h5 g6xh5 g4xh5 Kd5xd4 h5-h6 c4-c3+ Kd2-d1! b4-b3 h6-h7 13 13s 1.29 1123036 165670 g2-g4 b4-b3 Ke2-d2 b3-b2 Kd2-c2 c4-c3 d4-d5 Kf7-f6 h4-h5 g6xh5 g4xh5 Kf6-f5 d5-d6 14 28s 1.23 2275423 363835 Ke2-d2 Kf7-e6 g2-g4 Ke6-e7 h4-h5 g6xh5 g4xh5 Ke7-f6 d4-d5 Kf6-f5 h5-h6 c4-c3+ Kd2-d3! Kf5-g6 f4-f5+ 15 50s 1.44 3913661 684977 Ke2-d2 b4-b3 Kd2-c3 Kf7-e7 g2-g4 Ke7-f6 h4-h5 g6xh5 g4xh5 Kf6-g7 d4-d5 Kg7-h6 d5-d6 Kh6xh5 d6-d7 16 146s 1.60 10343016 2253049 Ke2-d2 Kf7-e7 g2-g4 Ke7-e6 h4-h5 g6xh5 g4xh5 Ke6-f5 d4-d5 Kf5-f6 Kd2-c2 Kf6-g7 d5-d6 c4-c3 f4-f5 Kg7-f6 I'm not sure if Wilhelm is really seeing what is going on. regards Rafael B. Andrist
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