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Subject: Re: Is this Mate in 17 or Mate in 20 ?

Author: Jeremiah Penery

Date: 16:58:39 10/11/03

Go up one level in this thread


On October 11, 2003 at 19:23:53, Jorge Pichard wrote:

>Ruffian announced Mate in 17 against itself and Smarthink evaluation stated Mate
>in 20, before Ruffian Resigned.
>
>[D]8/8/3k4/3p4/8/1P2K3/7P/8 b - -
>

Crafty v19.1

White(1): 8/8/3k4/3p4/8/1P2K3/7P/8 b - -
1. ... Kc5 2. Kd3 Kc6 3. Kd4 Kd6 4. h4 Ke6 5. b4! Kf5 6. Kxd5 Kf4
7. b5! Ke3 8. b6 Kd2 9. Kd4 Kd1 10. b7! Ke2! 11. b8=Q! Kf2 12. Qf4+
Kg1 13. Qg4+ Kh1 14. Ke4 Kh2 15. Kf3! Kh1 16. Qg2#

Black(1): analyze
Analyze Mode: type "exit" to terminate.
              clearing hash tables
              time surplus   0.00  time limit 22.50 (3:30)
              depth   time  score   variation (1)
                1     0.01   7.51   1. ... Ke5
                1->   0.02   7.51   1. ... Ke5
                2     0.02     --   1. ... Ke5
                2     0.02  Mat15   1. ... Ke5 <EGTB>
                2->   0.02  Mat15   1. ... Ke5 <EGTB>
                3     0.02  Mat15   1. ... Ke5 <EGTB>
                3->   0.02  Mat15   1. ... Ke5 <EGTB>
                4     0.02  Mat15   1. ... Ke5 <EGTB>
                4->   0.02  Mat15   1. ... Ke5 <EGTB>
      Elapsed Time: 0.11, CPU Time: 0.00, CPU Use: 0%
      Root Material Balance: 100, Predicted Moves: 0
      Nodes: 52, Evaluations: 8, FH%: 100%, NPS: 0k
      EXTENSIONS->
      Threat: 0, Check: 4, One Move: 0
      Passed Pawn: 0, Recapture: 0
      PRUNING->  Futility: 0, Razors: 0
      TABLEBASES-> Probes: 8, Successful: 8



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