Author: John Merlino
Date: 09:12:48 04/30/05
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On April 30, 2005 at 08:57:14, Rob Basham wrote: >[D]rnb2rk1/pp2bppp/2p5/q7/4NN2/4B1QP/PPP3P1/2KR3R w - - 0 1 > >Any program find....Rd5....? > >All my programs just play Nd5... > >Rd5 attacks Queen and blocks the fifth file all in one move, >so gains a tempo, permiting the next move Nh5..(after cxd5) etc. > >This could be a move that the computers just do not play. > >Rob The problem is that cxd5 is not required for Black. After 1.Rd5 Qc7! 2.Rh5, The King (CM9_R1 on a P4-2.4) gives 2...Na6 an eval of about +0.9 for White after three minutes, which isn't particularly exciting. After 2...Na6, the line might go 3.Bd4 f6 4.Qb3+ Rf7 5.Rf1 Qd7, and Black might be able to hold. The eval at this position after three minutes is still in the +0.9 range. However, 1.Nd5 will probably have an eval of around +2.5 for White, which is much harder to ignore.... jm
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