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Subject: Re: What could have saved Trueno in this game?

Author: Richard Pijl

Date: 00:21:04 04/28/04

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On April 27, 2004 at 21:17:05, Andrew Wagner wrote:

>On April 27, 2004 at 20:51:07, Will Singleton wrote:
>
>>Just looks like tactical error.  58.Qe8+ allows the enemy king to penetrate the
>>pawn wall, so the king and queen can threaten material and mate.  Maybe you
>>still need more depth.  How long does it take Trueno to switch to Qd7? (if the
>>king now tries to penetrate, lots of pawns fall.)
>
>I assume you're talking about 56. Qd7 there. The position is:
>
>[d] 8/5p2/3p4/2p1k1p1/Q1PqP2p/5P1P/6PK/8 w - - 22 56
>
>Unfortunately it takes Trueno a good 36 seconds to find that Qd7 is better.
>Perhaps my endgame king pcsq table needs some revising. What do others get here?
>Andrew
>
The Baron 1.3.0 on Xeon 2.8:

 ply       time        nodes   score  pv
  5(14).   0:00.05     14227   +0.49  Qa4-d7 Qd4-f2 Qd7-f5 Ke5-d4 Qf5-d5 Kd4-c3
                                      Qd5xf7 Qf2-g3 Kh2-g1 Kc3-d4
  6(16)&   0:00.09     31433   +0.15  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-c3 Qd5xf7 c5-c4
  6(16).   0:00.14     45064   +0.15  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-c3 Qd5xf7 c5-c4
  7(17)&   0:00.25     79500   +0.33  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-b4 Qd5xf7 c5-c4 g2-g3
  7(18).   0:00.33    106997   +0.33  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-b4 Qd5xf7 c5-c4 g2-g3
  8(18)&   0:00.48    169666   +0.27  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-c3 Qd5xf7 c5-c4 Qf7-d5 Kc3-b3
  8(20).   0:00.70    248807   +0.27  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-c3 Qd5xf7 c5-c4 Qf7-d5 Kc3-b3
  9(22)&   0:01.13    407321   +0.37  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-c3 Qd5xf7 c5-c4 Qf7-f6 Kc3-d3
                                      g2-g3
  9(23).   0:01.50    554568   +0.37  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-c3 Qd5xf7 c5-c4 Qf7-f6 Kc3-d3
                                      g2-g3
 10(24)&   0:02.81   1024606   +0.26  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-c3 Qd5xf7 c5-c4 Qf7-d5 Qe3-f4
                                      Kh2-g1 Qf4-e3 Kg1-f1
 10(25).   0:04.19   1533272   +0.26  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-c3 Qd5xf7 c5-c4 Qf7-d5 Qe3-f4
                                      Kh2-g1 Qf4-e3 Kg1-f1
 11(26)&   0:08.06   3015100   +0.17  Qa4-d7 Qd4xc4 Qd7-e7 Qc4-e6 Qe7xg5 Ke5-d4
                                      Qg5xh4 c5-c4 Qh4-e1 c4-c3 Qe1-d1 Kd4-e3
                                      g2-g3 f7-f6
 11(26).   0:11.75   4416119   +0.17  Qa4-d7 Qd4xc4 Qd7-e7 Qc4-e6 Qe7xg5 Ke5-d4
                                      Qg5xh4 c5-c4 Qh4-e1 c4-c3 Qe1-d1 Kd4-e3
                                      g2-g3 f7-f6
 12(28)&   0:17.44   6487311   +0.25  Qa4-d7 Qd4xc4 Qd7-e7 Qc4-e6 Qe7xg5 Ke5-d4
                                      Qg5xh4 c5-c4 Qh4-e1 c4-c3 Qe1-d1 Kd4-e3
                                      h3-h4 Qe6-e5 g2-g3 Qe5-d4
 12(29).   0:21.72   8067016   +0.25  Qa4-d7 Qd4xc4 Qd7-e7 Qc4-e6 Qe7xg5 Ke5-d4
                                      Qg5xh4 c5-c4 Qh4-e1 c4-c3 Qe1-d1 Kd4-e3
                                      h3-h4 Qe6-e5 g2-g3 Qe5-d4
 13(31)&   0:44.05  16364238   +0.00  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-b4 Qd5-b7 Kb4-a4 Qb7-a6 Ka4-b3
                                      Qa6-b7 Kb3-a4 <rep>
 13(31).   1:13.13  26693178   +0.00  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-b4 Qd5-b7 Kb4-a4 Qb7-a6 Ka4-b3
                                      Qa6-b7 Kb3-a4 <rep>
 14(32)&   1:25.94  31415342   +0.00  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-b4 Qd5-b7 Kb4-a4 Qb7-a6 Ka4-b3
                                      Qa6-b7 Kb3-a4 <rep>
 14(33).   1:45.78  38251743   +0.00  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-b4 Qd5-b7 Kb4-a4 Qb7-a6 Ka4-b3
                                      Qa6-b7 Kb3-a4 <rep>
 15(33)&   2:42.78  58947025   +0.00  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-b4 Qd5-b7 Kb4-a4 Qb7-a6 Ka4-b3
                                      Qa6-b7 Kb3-a4 <rep>
 15(36).   3:26.77  75309486   +0.00  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-b4 Qd5-b7 Kb4-a4 Qb7-a6 Ka4-b3
                                      Qa6-b7 Kb3-a4 <rep>
 16(36)&   5:22.03 121432781   +0.00  Qa4-d7 Qd4-e3 Qd7-e7 Ke5-d4 Qe7xd6 Kd4xc4
                                      Qd6-d5 Kc4-b4 Qd5-b7 Kb4-a4 Qb7-a6 Ka4-b3
                                      Qa6-b7 Kb3-a4 <rep>



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