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Subject: Re: Mate in 7 moves - diagram

Author: Andrew Williams

Date: 01:21:19 09/28/00

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On September 27, 2000 at 20:03:27, Peter McKenzie wrote:

>On September 27, 2000 at 17:16:21, Andrew Williams wrote:
>
>>On September 27, 2000 at 04:45:38, Eduard Nemeth wrote:
>>
>>>[D]8/8/p3R3/1p5p/1P5p/6rp/5K1p/7k w - - 0 1
>>>
>>>Shredder 4 and Fritz 6a this don't find !
>>>
>>>Eduard
>>
>>PostModernist finds this easily enough:
>>
>>9=  +M07     2    102865   1. Re1 Rg1 2. Rf1 a5 3. bxa5 b4 4. a6 b3 5. a7 Rxf1
>>6. Kxf1 b2 7. a8=Q
>>
>>ie 2 seconds, 102865 nodes.
>
>LambChop didn't find it, it looks like a nullmove problem to me.
>After 1.Re1+ Rg1 2.Rf1 black just nullmoves, so the zugzwang is not detected.
>
>I guess you don't nullmove in Rook endings?
>

Correct.

Andrew Williams



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