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Subject: Re: Another WAC bust

Author: Jeremiah Penery

Date: 00:36:38 11/21/00

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On November 21, 2000 at 03:21:54, Dann Corbit wrote:

>I have a machine with lots of memory and lots of tablebase files.  Running
>ExChess 4.01 on that machine with 100 megs hash and all 5 + some 6 piece
>tablebase files gave this:
>
>[D]1k6/5RP1/1P6/1K6/6r1/8/8/8 w - - bm Ka5 Kc5; id "WAC.041";

It appears that b7 is a mate in 18.

19->    1:34  Mat18   1. b7 Rg5+ 2. Kc6 Rg6+ 3. Kd5 Rg5+
                      4. Ke6 Rg6+ 5. Kf5 Rg1 6. Rf8+ Kxb7
                      <HT>

It first found mate in 23, then 21, 20, and 18.  So it could go down again, but
I doubt it.

However, Ka5 seems to be a mate in 15, and Kc5 a mate in 17.

15->    1:14  Mat15   1. Ka5 Rg1 2. Rf8+ Kb7 3. g8=Q Ra1+
                      4. Kb4 Rb1+ 5. Qb3 Rxb3+ <HT>

15->    1:06  Mat17   1. Kc5 Rg5+ 2. Kb4 Rg4+ 3. Ka5 Rg1
                      4. Rf8+ Kb7 5. g8=Q <HT>




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