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Subject: Re: mate threat extension/null move

Author: Uri Blass

Date: 04:29:41 10/06/04

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On October 06, 2004 at 06:38:28, Tony Werten wrote:

>On October 06, 2004 at 05:19:27, Uri Blass wrote:
>>If you use mate threat extension(and if I understand correctly you use it) then
>>I suggest to limit it to the case when
>>the following conditions happens:
>>1)There is no another extension for the last 2 plies.
>>2)The side that threats the mate has not a big advantage of more than 2 pawns
>>and it means that the evaluation is better than 2 pawns against the side to
>3) You do not have winning capture on the piece that delivers the checkmate.

3 may help in game but unfortunately I am afraid it does not help to solve

[D]4r1k1/p1qr1p2/2pb1Bp1/1p5p/3P1n1R/1B3P2/PP3PK1/2Q4R w - - 0 1

1.Qxf4 Bxf4 2.Rxh5 gxh5 is part of the line that you need to see.

black has a winning capture on the piece that delivers the checkmate(2....gxh5)
but unfortunately 2.Rxh5 is still the right move.


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