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Subject: Re: Simple Endgame for programs without TBs ??

Author: Eduard Nemeth

Date: 17:09:18 11/21/00

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On November 21, 2000 at 19:12:13, Brian Richardson wrote:

>On November 21, 2000 at 18:27:28, Eduard Nemeth wrote:
>
>>[D]8/2K5/1p6/1P4k1/5p2/8/6P1/8 w - - 0 1
>>
>>Here a correct analysis:
>>
>>1. Kc6 Kg4 2. Kd6 Kh4 3. Ke6 Kg5 4. Ke5 Kg4 5. Kf6 Kh4 6. Kf5 Kg3 7. Kg5 f3 8.
>>gxf3 Kxf3 9. Kf5 ++-
>>
>>1.Kxb6 is draw.
>>
>>By me this winning only Fritz, without TBs !
>>
>>Eduard
>
>Crafty v17.12 finds the right move, but not the full mate after 1:15 on my
>PIII733 at a pretty remarkable depth 23:
>
>               23     1:05   7.12   1. Kxb6 Kg4 2. Kc6 Kg3 3. b6 Kxg2 4.
>                                    b7 f3 5. b8=Q f2 6. Qg8+ Kh1 7. Qc4
>                                    Kg1 8. Qc5 Kg2 9. Qg5+ Kh1 10. Qh6+
>                                    Kg2 11. Qg7+ Kh2 12. Qh7+ Kg1 13. Qg6+
>                                    Kh2 14. Qh5+ Kg1 15. Qg4+ Kh1 16. Qf3+
>                                    Kg1 17. Qg3+ Kf1 18. Qe5
>               23     1:15     ++   1. Kc6!!
>               23     1:23   8.19   1. Kc6 Kg4 2. Kd6 Kh4 3. Ke6 Kg5 4.
>                                    Ke5 Kg6 5. Kxf4 Kf6 6. g4 Ke6 7. Kg5
>                                    Kd5 8. Kg6 Kc5 9. g5 Kxb5 10. Kf7 Kc4
>                                    11. g6 <HT>
>               23->   1:31   8.19   1. Kc6 Kg4 2. Kd6 Kh4 3. Ke6 Kg5 4.
>                                    Ke5 Kg6 5. Kxf4 Kf6 6. g4 Ke6 7. Kg5
>                                    Kd5 8. Kg6 Kc5 9. g5 Kxb5 10. Kf7 Kc4
>                                    11. g6 <HT>

Hello,
it is a very good time !

Fritz 6 played by me 1.Kc6 after 6 Minutes but after 12 minutes again 1.Kxb6.

I tested this position first in year 1996 on a P150 with 16 MB RAM with
Genius 4.0 (Win) and the Genius played here correct after 48 hours ! :)

Here the analysis by Gandalf 4.32f (32 MB) and Crafty 17.13 (64 MB) on my P600:

Analysis by Gandalf 4.32f:

  +-  (2.59)   deep: 19   00:00:55  24686kN
1.Kxb6
  +-  (2.59)   deep: 20   00:03:39  100298kN
1.Kxb6
  +-  (2.36)   deep: 21   00:06:52  181944kN
1.Kc6
  +-  (1.77)   deep: 21   00:14:29  181944kN

Analysis by Crafty 17.13:

1.Kxb6 Kg4 2.Kc5 Kg3 3.b6 Kxg2 4.b7 f3 5.b8D f2 6.Da8+ Kg1 7.Dg8+ Kh1 8.Dc4 Kg1
9.Dg4+ Kh1 10.Df3+ Kg1 11.Dg3+ Kh1 12.Dh4+ Kg1 13.Dg5+ Kh1 14.Dh6+ Kg2 15.Dg7+
Kh1
  +-  (6.34)   deep: 26/47   00:02:20  77181kN
1.Kc6
  +-  (6.74)   deep: 26/47   00:02:25  80179kN
1.Kc6 Kg4 2.Kd6 Kg3 3.Ke5 Kxg2 4.Kxf4 Kh1 5.Ke5 Kg2 6.Kd6 Kf3 7.Kc7 Ke4 8.Kxb6
Kd5 9.Ka7 Ke6 10.b6 Ke5 11.b7 Kd5 12.Kb6 Kd4
  +-  (9.63)   deep: 26/47   00:02:53  94839kN

Eduard





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