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Subject: Re: Perpetual Check

Author: Günther Simon

Date: 16:32:50 09/05/04

Go up one level in this thread


On September 05, 2004 at 19:27:49, Uri Blass wrote:

>On September 05, 2004 at 19:17:24, Günther Simon wrote:
>
>>On September 05, 2004 at 19:04:48, Uri Blass wrote:
>>
>>>On September 05, 2004 at 18:55:53, Günther Simon wrote:
>>>
>>>>On September 04, 2004 at 11:46:48, Ed Schröder wrote:
>>>>
>>>>>Does someone possess a good test set for testing Perpetual Checks ?
>>>>>
>>>>>Thanks.
>>>>>
>>>>>Ed
>>>>
>>>>
>>>>Well may be this one is too difficult for all current programs ;)
>>>>For the record, this game really happened just one hour ago
>>>>in a RWBC test tourney with live broadcast.
>>>>Humans immediately see the draw I guess...
>>>>The prog with Black resigned a few moves after it saced the first rook
>>>>and started to check. May be with resign off it would have played
>>>>alright until 50 moves rule? (Resign was -8)
>>>>
>>>>[D] 7k/R5R1/8/3r3P/3r3K/5P2/6P1/8 w - - 0 59
>>>
>>>No draw
>>>Movei finds the line
>>>
>>>g4 Rxg4+ Rxg4 Rxh5+ Kg3 Rh3+ Kf4 Rxf3+ Ke4 Re3+ Kd4 Rd3+ Kc4 Rc3+ Kb5 Rc5+ Ka4
>>>
>>>Uri
>>
>>Movei is wrong.
>>
>>Günther
>
>No
>
>g4 Rxg4+ is the only check
>
>Rxh5+ Kxh5 Rd5+(only check) Rg5 Rxg5+ Kxg5 no stalemate
>
>later it is easy for me to see that black moves are the only checks and in the
>end after Ka4 white can take with the rook to avoid stalemate.
>
>Uri

You are right I missed you had Rxg4 instead of Kxg4 your PV, sorry.

Then we have to cancel the double sac and return to a position
which really happened later:


[D] 7k/R5R1/8/3r3P/6K1/5P2/8/8 b - - 0 60



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