Author: Slater Wold
Date: 09:26:55 04/01/04
Go up one level in this thread
On April 01, 2004 at 12:04:39, Robert Hyatt wrote: >On March 31, 2004 at 23:15:56, Slater Wold wrote: > >>On March 31, 2004 at 22:35:50, Robert Hyatt wrote: >> >>>On March 31, 2004 at 11:09:26, Mihaly Szalai wrote: >>> >>>>From the game Chekhov - Sorokin, Protvino,1988. >>>> >>>>[D]5k2/6p1/2p5/2P2PKP/3B4/1b6/1P6/8 w - - 0 52 >>>> >>>>White is two pawns up but there are opposite color bishops. >>>>Both 52.f6 and 52.h6 are bad, however 52.Bxg7! wins. >>>> >>>>You should show it to your engine, I'm sure that quite a few >>>>will find it. >>>> >>>>Thanks >>>>Mihaly >>> >>> >>>Takes Crafty about two seconds on my dual xeon to find the move, about a half a >>>minute to see a winning score: >>> >>> 19 39.63 +1 1. Bxg7+!! >>> 19 42.46 +3 1. Bxg7+!! >>> 19 49.90 2.95 1. Bxg7+ Kxg7 2. f6+ Kh7 3. Kf4 Kh6 >>> 4. Ke5 Kg5 5. Kd6 Kxf6 6. Kxc6 Ke6 >>> 7. h6 Bd5+ 8. Kb6 Kf6 9. c6 Be6 10. >>> Kb7 Bd5 11. b4 Ke5 (s=8) >>> 19-> 1:21 2.95 1. Bxg7+ Kxg7 2. f6+ Kh7 3. Kf4 Kh6 >>> 4. Ke5 Kg5 5. Kd6 Kxf6 6. Kxc6 Ke6 >>> 7. h6 Bd5+ 8. Kb6 Kf6 9. c6 Be6 10. >>> Kb7 Bd5 11. b4 Ke5 (s=7) >> >>I take it you've made some changes? >> >>What is that +1 & +3?? > > >That is in the most recently released version I think. It fails high (or low) >in steps. +1 means expectation is winning a pawn, +3 is winning a piece, +M >means beta was relaxed to + infinity (probably mating)... I thought 19.11 was the current release, which I have, and it does not do this. :) I like the change though!
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