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Subject: Re: Genious queen sac -- crafty19.10

Author: Frank E. Oldham

Date: 18:39:33 05/24/04

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On May 23, 2004 at 07:33:06, Harald Faber wrote:

>[D]r2q1r2/1b2bpkp/p3p1p1/2ppP1P1/7R/1PN1BQR1/1PP2P1P/4K3 w - - 0 19
>
>[Event "Vilnius, Litauische Meisterschaft"]
>[Site "home"]
>[Date "2004.??.??"]
>[Round "?"]
>[White "Asauskas"]
>[Black "Malisauskas"]
>[Result "1-0"]
>[SetUp "1"]
>[FEN "r2q1r2/1b2bpkp/p3p1p1/2ppP1P1/7R/1PN1BQR1/1PP2P1P/4K3 w - - 0 19"]
>[PlyCount "11"]
>
>19. Qf6+!! Bxf6 20. gxf6+ Kg8 21. Rxh7! Kxh7 22. Rh3+ Kg8 23. Bh6 Qc7 24. f4 1-0
>
>Shredder 8 on my Celeron@1539MHz has no idea after 35min. Which program solves
>this tough position, needing how much time on which hardware?

crafty19.10 finds it in ply 17 after quite a bit of thinking ;-)
               16->  19:27  -0.03   1. Bd2 Bc6 2. Qf4 Rh8 3. Rf3 Qe8 4.
                                    Rfh3 a5 5. Kf1 Rb8 6. Nd1 Bb5+ 7. Ke1
                                    Qd8 8. Nc3 Bc6 9. Rf3 <HT> (s=2)
               17    40:41  -0.15   1. Bd2 Rb8 2. Qf4 Rh8 3. Kf1 Bc6 4.
                                    Rf3 Qe8 5. Kg1 Rb4 6. Qg3 Rb7 7. Rhf4
                                    Rf8 <HT>
               17    64:39     ++   1. Qf6+!!
               17    78:37   5.14   1. Qf6+ Bxf6 2. gxf6+ Qxf6 3. exf6+
                                    Kxf6 4. Bxc5 Rfe8 5. Rxh7 d4 6. Bxd4+
                                    e5 7. Be3 Rh8 8. Bg5+ Ke6 9. Rgh3 Rxh7
                                    10. Rxh7 Bf3 11. Rh3 e4 12. Rh7
               17->  80:52   5.14   1. Qf6+ Bxf6 2. gxf6+ Qxf6 3. exf6+
                                    Kxf6 4. Bxc5 Rfe8 5. Rxh7 d4 6. Bxd4+
                                    e5 7. Be3 Rh8 8. Bg5+ Ke6 9. Rgh3 Rxh7
                                    10. Rxh7 Bf3 11. Rh3 e4 12. Rh7 (s=3)
               18    86:43   5.21   1. Qf6+ Bxf6 2. gxf6+ Qxf6 3. exf6+
                                    Kxf6 4. Bxc5 Kg7 5. Bxf8+ Rxf8 6. Rb4
                                    Bc6 7. Rb6 Rc8 8. Ne2 Bd7 9. Kd2 h6
                                    10. Nd4 e5 11. Rb7 Bc6 (s=2)
               18->  90:59   5.21   1. Qf6+ Bxf6 2. gxf6+ Qxf6 3. exf6+
                                    Kxf6 4. Bxc5 Kg7 5. Bxf8+ Rxf8 6. Rb4
                                    Bc6 7. Rb6 Rc8 8. Ne2 Bd7 9. Kd2 h6
                                    10. Nd4 e5 11. Rb7 Bc6 (s=2)
               19   111:45   1/46*  1. Qf6+
White(1): ?
              time=111:52  cpu=393%  mat=0  n=17280568124  fh=92%  nps=2.57M
              ext-> chk=912226596 cap=34025619 pp=15499745 1rep=82885020
mate=8793844
              predicted=0  nodes=17280568124  evals=452717469
              endgame tablebase-> probes=0  hits=0
              SMP->  split=4922  stop=842  data=10/32  cpu=439:54  elap=111:52

Frank



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