Author: Vincent Lejeune
Date: 16:00:36 10/03/00
Go up one level in this thread
after this moves sequence the position is be lost, a second pawn will fall (white threat Rf6 followed by f4! to take the e pawn ...) [Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "New position"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "4bb1k/4qn1p/5p2/2Q1p1p1/1r2P3/1BN2P2/5BPP/3R2K1 w - - 0 1"] [PlyCount "30"] 1. Qxe7 Bxe7 2. Bxf7 Bxf7 3. Rd7 Rb3 4. Rxe7 Rxc3 5. Rxf7 Rc1+ 6. Be1 Rxe1+ 7. Kf2 Rc1 8. Rxf6 Rc5 9. Rf5 h6 10. Kg3 Kg7 11. h4 gxh4+ 12. Kxh4 Kg6 13. Kg4 Rb5 14. g3 Ra5 15. f4 Kg7 * On October 03, 2000 at 17:34:59, John Merlino wrote: >On October 03, 2000 at 14:09:18, Uri Blass wrote: > >>These positions are from the latest match chessmaster8000-Crafty17.13 that was >>posted here. >>My impression from the match is that crafty has king safety problems and lost >>some games by king attacks. >> >>1)[D]4bb1k/4qn1p/5p2/2Q1p1p1/1r2P3/1BN2P2/5BPP/3R2K1 w - - 0 1 >>In this position chessmaster8000 played Qd5 instead of Qxe7 that wins a pawn and >>drew the game. >> >>I am interested to know how much time does chessmaster8000 need to find Qxe7. >>I tried Chessmaster6000 and after 2 hours that it did not find Qxe7 and I gave >>up. >>Later I gave it the moves Qxe7 Bxe7 and it needed some minutes to find the >>obvious Bxf7. >> > >I'm not sure that this is "obvious", given the time control (and the fact that >neither of us know how much time CM had on its clock). After 1.Qxe7 Bxe7 2.Bxf7 >Bxf7 3.Rd7 Rb3 4.Rxe7 Rxc3 5.Rxf7 Rc1+ 6.Be1 Rxe1+ 7.Kf2, White definitely wins >a pawn. And, yes, it does seem obvious to me, too. But, oddly enough, the eval >after the 15 plies necessary to calculate this is only about 0.4 higher than >what it was at this position. > >CM8000 does consider Qxe7 briefly, but then switches to Qd5 at depth 8 at 0:06. >It still believes Qd5 is the best move at depth 11 (nowhere near depth 15), >after 3:11. > >jm
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