Computer Chess Club Archives


Search

Terms

Messages

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

Author: Sune Fischer

Date: 17:11:42 10/11/03

Go up one level in this thread


On October 11, 2003 at 19:58:39, Jeremiah Penery wrote:

>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

Yeah frenzee agrees:

depth=63 7/8(Ke7) +2999.70 [Mated in 15] 1...Kc5 2.h4 d4+ 3.Kd3 Kd5 4.b4 Ke5
5.b5 Kd5 6.h5 Kc5 7.h6 Kxb5 8.Kxd4 Kc6 9.h7 Kd6 10.h8=Q Ke6 11.Qh4 Kf5 12.Kd5
Kg6 13.Ke6 Kg7 14.Qg3+ Kh6 15.Kf6 Kh5 16.Qh3++
Nodes: 496 NPS: 82
Time: 00:00:06.00

-S.



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.