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Subject: Re: simple position not easy for most engines

Author: Richard Pijl

Date: 11:21:18 10/02/05

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On October 02, 2005 at 13:49:37, Will Singleton wrote:

>White wins easily by promoting and exchanging queens, but most comps can't see
>it.
>
>[d]8/5p1P/8/8/6K1/5P2/1k6/q7 w - -
>

The Baron needs a minute to plan the exchange from this position. It does play
h8=Q anyway. (P4-2.4, no EGTB's of course).

 ply       time        nodes   score  pv
  8(18)&   0:01.16    254726   +1.25  h7-h8Q Kb2-a2 Qh8-a8 Ka2-b2 Qa8-b7
                                      Kb2-c3 Qb7xf7 Qa1-g1 Kg4-f5 Qg1-c5 Kf5-f6
                                      Qc5-d4
  8(18).   0:01.16    264704   +1.25  h7-h8Q Kb2-a2 Qh8-a8 Ka2-b2 Qa8-b7
                                      Kb2-c3 Qb7xf7 Qa1-g1 Kg4-f5 Qg1-c5 Kf5-f6
                                      Qc5-d4
  9(19)&   0:01.87    564705   +1.21  h7-h8Q Kb2-a2 Qh8-a8 Ka2-b2 Qa8-b7
                                      Kb2-c3 Qb7xf7 Qa1-g1 Kg4-f5 Qg1-c5 Kf5-f6
                                      Qc5-d6 Qf7-e6 (Qd6-g3)
  9(19).   0:01.93    579636   +1.21  h7-h8Q Kb2-a2 Qh8-a8 Ka2-b2 Qa8-b7
                                      Kb2-c3 Qb7xf7 Qa1-g1 Kg4-f5 Qg1-c5 Kf5-f6
                                      Qc5-d6 Qf7-e6 (Qd6-g3)
 10(20)&   0:03.13   1123277   +1.22  h7-h8Q Kb2-a2 Qh8-a8 Ka2-b2 Qa8-b7
                                      Kb2-c3 Qb7xf7 Qa1-g1 Kg4-f5 Qg1-c5 Kf5-g6
                                      Qc5-g1 Kg6-f6 Qg1-d4 Kf6-g5 (Qd4-g1)
 10(20).   0:03.19   1148202   +1.22  h7-h8Q Kb2-a2 Qh8-a8 Ka2-b2 Qa8-b7
                                      Kb2-c3 Qb7xf7 Qa1-g1 Kg4-f5 Qg1-c5 Kf5-g6
                                      Qc5-g1 Kg6-f6 Qg1-d4 Kf6-g5 (Qd4-g1)
 11(22)&   0:05.77   2289007   +1.26  h7-h8Q Kb2-a2 Qh8-a8 Ka2-b2 Qa8-b7
                                      Kb2-c3 Qb7xf7 Qa1-g1 Kg4-f5 Qg1-c5 Kf5-g6
                                      Qc5-g1 Kg6-f6 Qg1-d4 Kf6-g5 Qd4-g1
 11(22).   0:05.88   2349179   +1.26  h7-h8Q Kb2-a2 Qh8-a8 Ka2-b2 Qa8-b7
                                      Kb2-c3 Qb7xf7 Qa1-g1 Kg4-f5 Qg1-c5 Kf5-g6
                                      Qc5-g1 Kg6-f6 Qg1-d4 Kf6-g5 Qd4-g1
 12(24)&   0:11.15   4863914   +1.25  h7-h8Q Kb2-a2 Qh8-a8 Ka2-b2 Qa8-b7
                                      Kb2-c3 Qb7xf7 Qa1-g1 Kg4-f5 Qg1-c5 Kf5-g6
                                      Qc5-g1 Kg6-f6 Qg1-d4 Kf6-g5 Qd4-g1 Kg5-f4
                                      Qg1-d4 (Kf4-g5) <rep>
 12(24).   0:11.32   4953507   +1.25  h7-h8Q Kb2-a2 Qh8-a8 Ka2-b2 Qa8-b7
                                      Kb2-c3 Qb7xf7 Qa1-g1 Kg4-f5 Qg1-c5 Kf5-g6
                                      Qc5-g1 Kg6-f6 Qg1-d4 Kf6-g5 Qd4-g1 Kg5-f4
                                      Qg1-d4 (Kf4-g5) <rep>
 13(25)+   0:58.55  25852313   +1.60  h7-h8Q (Kb2-a2) (Qh8xa1) (Ka2xa1) (Kg4-f5)

                                      (Ka1-b2) (f3-f4) (Kb2-c3) (Kf5-e5)
(Kc3-d2) (f4-f5)
                                      (Kd2-e3) (f5-f6) (Ke3-d3) (Ke5-d6)
(Kd3-e3) (Kd6-e7)
 13(25)+   1:23.87  37163724   +8.90  h7-h8Q (Kb2-a2) (Qh8xa1) (Ka2xa1) (Kg4-f5)

                                      (Ka1-b2) (f3-f4) (Kb2-c3) (Kf5-e5)
(Kc3-d2) (f4-f5)
                                      (Kd2-e3) (f5-f6) (Ke3-d3) (Ke5-d6)
(Kd3-e3) (Kd6-e7)
 13(25)&   1:24.97  37820479  +10.58  h7-h8Q Kb2-a2 Qh8xa1 Ka2xa1 Kg4-f5
                                      Ka1-b2 f3-f4 Kb2-c3 Kf5-e5 Kc3-d2 f4-f5
                                      Kd2-e3 f5-f6 Ke3-d3 Ke5-d6 Kd3-e3 Kd6-e7
                                      (Ke3-d4) (Ke7xf7)
 13(25).   1:25.30  38030732  +10.58  h7-h8Q Kb2-a2 Qh8xa1 Ka2xa1 Kg4-f5
                                      Ka1-b2 f3-f4 Kb2-c3 Kf5-e5 Kc3-d2 f4-f5
                                      Kd2-e3 f5-f6 Ke3-d3 Ke5-d6 Kd3-e3 Kd6-e7
                                      (Ke3-d4) (Ke7xf7)
 14(27)&   1:27.12  38949780  +10.58  h7-h8Q Kb2-a2 Qh8xa1 Ka2xa1 Kg4-f5
                                      Ka1-b2 f3-f4 Kb2-c3 Kf5-e5 Kc3-d2 f4-f5
                                      Kd2-e3 f5-f6 Ke3-d3 Ke5-d6 Kd3-e3 Kd6-e7
                                      Ke3-d4 (Ke7xf7)
 14(27).   1:27.66  39264559  +10.58  h7-h8Q Kb2-a2 Qh8xa1 Ka2xa1 Kg4-f5
                                      Ka1-b2 f3-f4 Kb2-c3 Kf5-e5 Kc3-d2 f4-f5
                                      Kd2-e3 f5-f6 Ke3-d3 Ke5-d6 Kd3-e3 Kd6-e7
                                      Ke3-d4 (Ke7xf7)
 15(27)&   1:30.41  40745446  +10.58  h7-h8Q Kb2-a2 Qh8xa1 Ka2xa1 (Kg4-f5)
                                      (Ka1-b2) (f3-f4) (Kb2-c3) (Kf5-e5)
(Kc3-d2) (f4-f5)
                                      (Kd2-e3) (f5-f6) (Ke3-d3) (Ke5-d6)
(Kd3-e3) (Kd6-e7)
                                      (Ke3-d4) (Ke7xf7)
 15(27).   1:31.73  41437671  +10.58  h7-h8Q Kb2-a2 Qh8xa1 Ka2xa1 (Kg4-f5)
                                      (Ka1-b2) (f3-f4) (Kb2-c3) (Kf5-e5)
(Kc3-d2) (f4-f5)
                                      (Kd2-e3) (f5-f6) (Ke3-d3) (Ke5-d6)
(Kd3-e3) (Kd6-e7)
                                      (Ke3-d4) (Ke7xf7)



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