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Subject: Re: Some new test positions

Author: Rafael Andrist

Date: 06:07:13 06/03/02

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On June 03, 2002 at 07:28:35, Uri Blass wrote:

>>>[D] r2qkb1r/pB1n1ppp/4p3/3p4/8/1P2Pb2/P1QP1PPP/RNB2RK1 b kq -

>latest position is solved only for tactical reasons and it takes almost 30
>minutes to fail highand almost 2 hours to solve the fail high.

It's a nice Nullmove test position. Try (after 1... Qg5 2.g3 Qg4 3.Bxa8?! Qh3)
B3kb1r/p2n1ppp/4p3/3p4/8/1P2PbPq/P1QP1P1P/RNB2RK1 w k - 1 4

Without Nullmove, Wilhelm now easily sees the mate, but it has problems to see
the mate threat g2 with Nullmove.

regards
Rafael B. Andrist




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