Author: Howard Exner
Date: 13:06:49 12/01/99
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On December 01, 1999 at 10:53:08, Dusan Dobes wrote: >On November 30, 1999 at 18:26:44, Howard Exner wrote: > >>Recently their have been some interesting posts on the theme of >>a Bishop exchange for two kingside pawns. One way to test your program >>is to have a series of such positions where at times it is a good idea >>to make the exchange while other times it is not. Below are some that work, >>- a1(posted by Peter McKenzie),b1 (posted last week by yibling fan), c1 and d1. >>The other five positions (a2,a3,b2,c2, and d2) are modifications to >>the originals and for these the exchange of bishop for two pawns should be >>avoided or at least becomes not as certain. Posa3 is now very speculative. > >I have run Phalanx XXI/ 10 min/move /pentium 150 on these positions and >it solved them all except Posa3 (the speculative one): For Posa3 I think avoiding Bxh6 is probably best. Playing Bxh6 here is just speculative. I just did not have the complete insight on this one to say Bxh6 is wrong. Initially I thought Bxh6 was incorrect but then started playing through lines that kept the move "alive" >Posa1 Bxh6 in 6.4 s >Posa2 Bxh6 is never in PV >Posa3 Bxh6 is never in PV (speculative) >Posb1 Bxh3 in 75 s >Posb2 Bxh3 is never in PV >Posc1 Bxh6 in 163 s >Posc2 Bxh6 is never in PV >Posd1 Bxh6 in 0.21 s >Posd2 Bxh6 is never in PV > >Dusan
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