Author: Uri Blass
Date: 08:46:26 02/17/02
Go up one level in this thread
On February 17, 2002 at 11:34:40, Christophe Theron wrote: >On February 17, 2002 at 05:43:22, Uri Blass wrote: > >>On February 17, 2002 at 05:21:47, Ed Schröder wrote: >> >>>On February 17, 2002 at 04:55:13, Steffen Jakob wrote: >>> >>>>Here is another position which is easy to solve for humans. In a blitz game >>>>between Hossa and Arasan the following position was on the board: >>>> >>>>[D]8/8/4B2p/2K5/r5P1/p5k1/Rb6/8 b - - 7 116 >>>> >>>>For humans it's rather easy to see that 117... Rxg4 wins without any problems >>>>because the white rook is totally paralyzed. Unfortunately Hossa wasn't able to >>>>see this in the blitz game. So the game continued until the 50 moves rule forced >>>>Hossa to take the bishop and finally to win the game. >>>>Which engines find 117... Rxg4 in which time? >>> >>>Easy for comps too :) >>> >>>2 secs for RC4 >>> >>>Ed >>> >>>============================================================== >>> >>>00:00:02.1 1,88 9 449751 Re4 Kd6 Re3 Bf5 Kf4 Be6 Re5 Bd7 >>>00:00:02.1 1,88 9 817955 Rxg4 >>>00:00:02.1 2,09 9 835992 Rxg4 Bxg4 Kxg4 Kd5 h5 Kd6 h4 Kd5 >>>00:00:03.3 2,17 10 1122788 Rxg4 Bxg4 Kxg4 Kd5 h5 Ke4 h4 Ke3 >>>00:00:04.5 2,01 11 2027319 Rxg4 Bxg4 Kxg4 Kc4 h5 Kd3 Kf3 Kc4 >>>00:00:34.6 3,62 12 31107270 Rxg4 Bd7 h5 Bc6 Rf4 Kb5 h4 Ka5 >>>00:00:44.1 3,82 13 41624594 Rxg4 Bd7 h5 Bc6 Rf4 Bb5 >> >> >>Trivial for Deep Fritz >> >>It knows that opposite color bishops with one pawn advantage gives good chances >>for a draw so it's only choice is to sacrifice the rook by evaluation. > > >Where do you see an opposite bishops ending after Rxg4 Bxg4 Kxg4 ? > > > > Christophe I see opposite bishops if black does not capture g4 and I guess that Fritz evaluated the alternative of not taking g4 as worse because of the opposite color bishops. Uri
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