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Subject: Re: Game 1: Gandalf 6 missed this ...

Author: Richard Pijl

Date: 00:30:46 11/26/04

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On November 25, 2004 at 16:19:38, George Sobala wrote:

>In game 1 Gandalf 6 missed that Bxf5 was winning.
>
>The "big" engines get this very quickly, second division engines take a while. A
>move to separate the men from the boys?
>
>[D] 3k4/7p/2PKB1p1/p4n2/Pp6/8/1P3P2/8 w - - 3 41

The Baron 1.5.0 sees Bxf5 pretty quickly, then almost loses it because of a
major drop in score, and later the score rises again. It could be a good
position for testing stability of pawn endgame evaluation:
  7(14)&   0:00.08     49024   +0.11  Kd6-c5 Kd8-c7 Be6-d5 Nf5-d6 f2-f4
                                      h7-h5 Bd5-e6 (h5-h4)
  7(14)+   0:00.09     52126   +0.44  Be6xf5 (g6xf5) (Kd6-e5) (Kd8-c7) (Ke5xf5)
                                      (Kc7-d6) (b2-b3) (Kd6xc6) (Kf5-e6)
  7(14)&   0:00.09     59926   +1.44  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-g5 Kc6-d5 Kg5-h6 Kd5-e4
(Kh6xh7)
  7(14).   0:00.13     69420   +1.44  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-g5 Kc6-d5 Kg5-h6 Kd5-e4
(Kh6xh7)
  8(17)&   0:00.16     94921   +1.44  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-g5 Kc6-d5 Kg5-h6 Kd5-e4 Kh6xh7
  8(17).   0:00.20    126812   +1.44  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-g5 Kc6-d5 Kg5-h6 Kd5-e4 Kh6xh7
  9(18)&   0:00.25    161017   +1.25  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-g5 Kc6-d5 Kg5-h6 Kd5-e4 Kh6xh7
                                      Ke4-f3
  9(18).   0:00.38    235472   +1.25  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-g5 Kc6-d5 Kg5-h6 Kd5-e4 Kh6xh7
                                      Ke4-f3
 10(19)&   0:00.45    297315   +0.45  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-g5 Kc6-d5 f2-f4 Kd5-e6 f4-f5
                                      Ke6-e7 b2-b3 Ke7-f7
 10(19).   0:00.73    482729   +0.45  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-g5 Kc6-d5 f2-f4 Kd5-e6 f4-f5
                                      Ke6-e7 b2-b3 Ke7-f7
 11(20)&   0:00.88    594929   +0.28  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-e6 b4-b3 f2-f4 h7-h5 f4-f5
                                      h5-h4 f5-f6 h4-h3 f6-f7 h3-h2 (f7-f8Q)
 11(20).   0:01.64   1090293   +0.28  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-e6 b4-b3 f2-f4 h7-h5 f4-f5
                                      h5-h4 f5-f6 h4-h3 f6-f7 h3-h2 (f7-f8Q)
 12(22)&   0:01.88   1263677   +0.28  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-e6 b4-b3 f2-f4 h7-h5 f4-f5
                                      h5-h4 f5-f6 h4-h3 f6-f7 h3-h2 f7-f8Q
 12(23).   0:03.17   2122878   +0.28  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-e6 b4-b3 f2-f4 h7-h5 f4-f5
                                      h5-h4 f5-f6 h4-h3 f6-f7 h3-h2 f7-f8Q
 13(24)&   0:03.55   2394816   +0.28  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-e6 b4-b3 f2-f4 h7-h5 f4-f5
                                      h5-h4 f5-f6 h4-h3 f6-f7 h3-h2 f7-f8Q
                                      h2-h1Q (Qf8-d6)
 13(24).   0:06.53   4339279   +0.28  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-e6 b4-b3 f2-f4 h7-h5 f4-f5
                                      h5-h4 f5-f6 h4-h3 f6-f7 h3-h2 f7-f8Q
                                      h2-h1Q (Qf8-d6)
 14(25)&   0:07.38   4971084   +0.22  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-e6 h7-h5 Ke6-f5 Kc6-d5 Kf5-g5
                                      Kd5-e4 Kg5xh5 Ke4-f3 b2-b3 Kf3xf2 Kh5-g5
 14(26).   0:18.39  12587376   +0.22  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 Kf5-e6 h7-h5 Ke6-f5 Kc6-d5 Kf5-g5
                                      Kd5-e4 Kg5xh5 Ke4-f3 b2-b3 Kf3xf2 Kh5-g5
 15(28)+   0:20.11  13712087   +0.52  Be6xf5 (g6xf5) (Kd6-e5) (Kd8-c7) (Ke5xf5)
                                      (Kc7xc6) (f2-f4) (Kc6-d5) (Kf5-f6) (h7-h5)
(Kf6-g5)
                                      (Kd5-e4) (f4-f5) (Ke4-e5) (f5-f6) (Ke5-e6)
(Kg5-g6)
 15(28)&   0:21.31  14550030   +0.66  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 f2-f4 Kc6-d5 Kf5-f6 h7-h5 Kf6-g5
                                      Kd5-e4 f4-f5 Ke4-e5 f5-f6 Ke5-e6 Kg5-g6
                                      h5-h4 Kg6-g7
 15(28).   0:34.80  23624660   +0.66  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 f2-f4 Kc6-d5 Kf5-f6 h7-h5 Kf6-g5
                                      Kd5-e4 f4-f5 Ke4-e5 f5-f6 Ke5-e6 Kg5-g6
                                      h5-h4 Kg6-g7
 16(30)+   0:37.95  25791910   +0.96  Be6xf5 (g6xf5) (Kd6-e5) (Kd8-c7) (Ke5xf5)
                                      (Kc7xc6) (f2-f4) (Kc6-d5) (Kf5-f6) (h7-h5)
(Kf6-g5)
                                      (Kd5-e4) (f4-f5) (Ke4-e5) (f5-f6) (Ke5-e6)
(Kg5-g6)
                                      (h5-h4) (f6-f7) (Ke6-e7) (Kg6-g7)
 16(30)+   0:50.98  33412478   +2.21  Be6xf5 (g6xf5) (Kd6-e5) (Kd8-c7) (Ke5xf5)
                                      (Kc7xc6) (f2-f4) (Kc6-d5) (Kf5-f6) (h7-h5)
(Kf6-g5)
                                      (Kd5-e4) (f4-f5) (Ke4-e5) (f5-f6) (Ke5-e6)
(Kg5-g6)
                                      (h5-h4) (f6-f7) (Ke6-e7) (Kg6-g7)
 16(30)&   0:57.36  37663961   +2.68  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 f2-f4 Kc6-d7 Kf5-f6 b4-b3 f4-f5
                                      h7-h5 Kf6-g5 Kd7-e7 Kg5xh5 Ke7-f6 Kh5-g4
                                      Kf6-f7 Kg4-g5 (Kf7-g7) (f5-f6)
 16(30).   1:27.06  57686169   +2.68  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 f2-f4 Kc6-d7 Kf5-f6 b4-b3 f4-f5
                                      h7-h5 Kf6-g5 Kd7-e7 Kg5xh5 Ke7-f6 Kh5-g4
                                      Kf6-f7 Kg4-g5 (Kf7-g7) (f5-f6)
 17(31)&   1:34.91  62250893   +1.50  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 f2-f4 Kc6-d5 Kf5-f6 Kd5-c4 f4-f5
                                      Kc4-b3 Kf6-e5 Kb3xb2 f5-f6 b4-b3 f6-f7
                                      Kb2-a2 f7-f8Q b3-b2 Qf8-f2 Ka2-a1 Qf2-d4
 17(32).   3:50.25 163278978   +1.50  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 f2-f4 Kc6-d5 Kf5-f6 Kd5-c4 f4-f5
                                      Kc4-b3 Kf6-e5 Kb3xb2 f5-f6 b4-b3 f6-f7
                                      Kb2-a2 f7-f8Q b3-b2 Qf8-f2 Ka2-a1 Qf2-d4
 18(33)+   4:01.08 169402172   +1.86  Be6xf5 (g6xf5) (Kd6-e5) (Kd8-c7) (Ke5xf5)
                                      (Kc7xc6) (f2-f4) (Kc6-d5) (Kf5-f6)
(Kd5-c4) (f4-f5)
                                      (Kc4-b3) (Kf6-e5) (Kb3xb2) (f5-f6) (b4-b3)
(f6-f7)
                                      (Kb2-a2) (f7-f8Q) (b3-b2) (Qf8-f2)
(Ka2-a1) (Qf2-d4)
 18(34)&   4:39.33 194442825   +3.01  Be6xf5 g6xf5 Kd6-e5 Kd8-c7 Ke5xf5
                                      Kc7xc6 f2-f4 Kc6-d5 Kf5-f6 h7-h5 Kf6-g5
                                      Kd5-e6 f4-f5 Ke6-f7 b2-b3 Kf7-g7 Kg5xh5
                                      Kg7-f6 Kh5-g4 Kf6-e7 Kg4-g5 Ke7-f7
(Kg5-h4)



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