Author: John Merlino
Date: 14:54:06 01/27/05
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On January 27, 2005 at 17:40:47, Ricardo Gibert wrote: >On January 27, 2005 at 16:37:11, Richard Harrison wrote: > >>In the following position, Shredder 8 plays the blunder move 66. Qxf4?? This >>move loses quickly. [After 15 minutes of thinking, still likes Qxf4] >> >>S7.04 does not deviate from 66. Qb2 and recognizes the draw instantly. Ruffian >>1.05 also plays Qb2 (0.00) >> >>What does your Shredder 8 play? >> >>[D]8/8/8/2K5/1Q3pP1/4nP2/3pk3/8 w - - 0 66 > >KQNKQ is generally an easy draw with some exceptional cases. Qxf4 reaches such >an ending with 2 extra pawns to boot, so I can't fault Qxf4. I can't see >anything particularly wrong with the choice. Why do you think this is a blunder? >Bear in mind that engines might return a large negative score in endings that >are easy draws. CM9_R1 chooses Qb2 instantly and announces a draw. If I force Qxf4 d1=Q, then (after two minutes on an AMD 2500) the eval is about -0.4 for Black, but the PV still looks like a draw (20 plies long with no captures, one tentative pawn push of g5, and otherwise just a bunch of checks from the Black Queen). jm
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