Author: Howard Exner
Date: 14:50:35 02/28/00
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On February 28, 2000 at 08:52:16, Robert Hyatt wrote: >Howard posted an interesting pawn ending test suite last week. Vincent >asked me about position 4, where Bxg6 is supposed to win. It seems that >cxb5 is also good enough to win in that position, based on a deep search >using tablebases. > >Anyone interested in studying this position? Here is my output (that I saved, >further searches were lost before I thought to save them): > > 15 3:54 2.92 1. cxb5 Bb7 2. Rdd1 Rd8 3. Bb3 Rf6 > 4. Re7+ Kc8 5. Be6+ Kb8 6. h4 Bf3 7. > Rd2 Be4 8. Kf2 Bf5 9. Bxf5 gxf5 10. > d7 Rxh6 > >I will try to post some analysis of Bxg6 as well... Looks like Black is in big trouble after both approaches, Bxg6 and cxb5. I usually try to salvage problems that have a multiple solution by changing the original so that one clean best move is the only choice. This may allow for one best move by removing white's c pawn: [D]r1b5/p2k1r1p/3P2pP/1ppR4/5p2/2P5/P1B4P/4R1K1 w - - Now Bxg6 seems best, as the promotion theme is there for the h pawn. Black can still but up a stiff resistence but white has practical winning chances. 1. Bxg6 hxg6 2. Re7+ Rxe7 3. dxe7+ Kxe7 4. Rd8!
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