Author: Uri Blass
Date: 06:28:27 06/03/02
Go up one level in this thread
On June 03, 2002 at 09:07:13, Rafael Andrist wrote: >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 I guess that without null move movei could see Qg5 at depth 10 and not at depth 12 but it still needs some minutes to find Qg5 even in that case because of worse branching factor. Uri
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