Author: Dusan Dobes
Date: 07:53:08 12/01/99
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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): 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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