Author: Sune Larsson
Date: 16:17:05 02/28/01
Go up one level in this thread
On February 28, 2001 at 19:12:09, John Merlino wrote: >On February 28, 2001 at 18:40:40, Sune Larsson wrote: > >> >> 8/2k4p/p1p1bp2/8/1P2PP2/4K3/7P/5B2 w - - 0 1 >> >> This is a position used by chesstrainers in Georgia (former USSR]. >> Got it from the horse's mouth during a combined vacation/chesstraining >> stay in Tbilisi a few years ago. It's from the game Eliskases-Capablanca, >> Semmering 1937. We have a bishop ending (same colors) with 4 pawns each. >> White is on the move and to conserve winning chances, he must avoid early >> simplification and - if possible - keep the pawns on both wings. >> Thus 1.Bxa6 Kb6 followed by 2.-c5 constitutes a wrong approach whereas >> 1.Kd4 is the right one. >> >> 1.Kd4 Kb6 [otherwise 2.Kc5] 2.Bc4 Bg4 [the pawn ending is lost] >> 3.e5 fxe5+ 4.fxe5 h6 5.h4 Bh5 6.e6 Be8 and black had many problems >> to overcome. White ultimately won the game. >> >> Test: 1. Kd4! should be chosen by your program. 1.Bxa6? draws. >> >> Sune > >CM8000 sees it in 13 seconds on a P3-600: That's very good! Something else than pawngrabbing is needed here... > >Time Depth Score Positions Moves >0:00 6/7 1.44 21737 1. Bxa6 Kb6 2. Be2 c5 3. bxc5+ > Kxc5 4. h4 h6 >0:00 7/8 1.40 53113 1. Bxa6 Kb6 2. Be2 c5 3. bxc5+ > Kxc5 4. h4 h6 5. Bd3 Kd6 >0:01 8/9 1.45 138902 1. Bxa6 Kb6 2. Bd3 c5 3. bxc5+ > Kxc5 4. h4 h6 5. Be2 Kd6 6. Kd4 >0:03 9/10 1.41 349204 1. Bxa6 Kb6 2. Bd3 c5 3. bxc5+ > Kxc5 4. e5 fxe5 5. fxe5 h5 6. Bg6 > Kd5 >0:09 10/11 1.43 977924 1. Bxa6 Kb6 2. Be2 c5 3. bxc5+ > Kxc5 4. h4 Bd7 5. Bh5 Be6 6. e5 > fxe5 7. fxe5 >0:13 10/11 1.51 1447625 1. Kd4 Bc8 2. e5 fxe5+ 3. Kxe5 > c5 4. bxc5 Kc6 5. Kd4 a5 6. Bd3 > h5 7. Be4+ Kb5 >0:28 11/12 1.55 3007564 1. Kd4 Bc8 2. e5 fxe5+ 3. Kxe5 > h6 4. f5 Kd7 5. f6 Ke8 6. Bc4 Kf8 > 7. h4 >0:56 12/13 1.62 6165733 1. Kd4 Bc8 2. e5 fxe5+ 3. Kxe5 > h6 4. f5 Kd7 5. f6 Ke8 6. Bc4 Kf8 > 7. h4 Ke8 >2:02 13/14 1.57 13427952 1. Kd4 Bc8 2. e5 fxe5+ 3. Kxe5 > h6 4. f5 Kd7 5. f6 Ke8 6. h4 Kf8 > 7. Bd3 Bb7 8. Bc4 > >jm
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