Author: Franck ZIBI
Date: 12:33:34 03/01/99
Go up one level in this thread
>u2600 Position of the Week-------------------------- >5R2/8/8/4rp2/3r4/5k2/2B1p2P/2K1R3 w - -ArasanX Amateur, 0-1, 1999.02.27, fics >In this position, White played 78. Rg8 and lost. Could your >program avoid that move within 10 seconds or so? The game might be >lost in any event (not sure); there is still some play left. Here is the output of ZChess 1.2 running on an AMD K6-266 1. 172 0 10 Rxf5 Rxf5 Bxf5 1-> 172 0 37 Rxf5 Rxf5 Bxf5 2. 0 0 100 Rxf5 Rxf5 Bxf5 Rd1 Rxd1 exd1 Kxd1 <EGTB> 2:) +++ 0 173 Bxf5!? 2. 105 0 253 Bxf5 Rc5 Kb2 2-> 105 0 354 Bxf5 Rc5 Kb2 3. -131 0 938 Bxf5 Rf4 Bg4 Kxg4 3. -85 0 1250 Rxf5 Rxf5 Bxf5 Kf2 Rh1 e1 Rxe1 Kxe1 3:) +++ 0 2329 Kb2!? 3. -79 0 2753 Kb2 f4 Kc3 3-> -79 0 3207 Kb2 f4 Kc3 4. -74 0 4471 Kb2 f4 Kc3 Ke3 4. -58 0 5069 Rxf5 Rxf5 Bxf5 Kf2 Rxe2 Kxe2 h4 4-> -58 0 6889 Rxf5 Rxf5 Bxf5 Kf2 Rxe2 Kxe2 h4 5. -82 1 8559 Rxf5 Rxf5 Bxf5 Kf2 Rxe2 Kxe2 h4 Ke3 5-> -82 1 21467 Rxf5 Rxf5 Bxf5 Kf2 Rxe2 Kxe2 h4 Ke3 6. -78 2 25336 Rxf5 Rxf5 Bxf5 Kf2 Rxe2 Kxe2 h4 Rc4 Kb2 Kf3 6-> -78 2 47327 Rxf5 Rxf5 Bxf5 Kf2 Rxe2 Kxe2 h4 Rc4 Kb2 Kf3 7. -80 4 64131 Rxf5 Rxf5 Bxf5 Kf2 Rh1 Rd5 Bg4 e1 Rxe1 Kxe1 7-> -80 6 111738 Rxf5 Rxf5 Bxf5 Kf2 Rh1 Rd5 Bg4 e1 Rxe1 Kxe1 8. -62 9 183510 Rxf5 Rxf5 Bxf5 Kf2 Rh1 Rd5 Bg4 Ra5 Kc2 e1 Rxe1 Kxe1 8-> -62 12 259493 Rxf5 Rxf5 Bxf5 Kf2 Rh1 Rd5 Bg4 Ra5 Kc2 e1 Rxe1 Kxe1 9. -81 16 323345 Rxf5 Rxf5 Bxf5 Kf2 Rh1 e1 Rxe1 Kxe1 h4 Rd2 h5 Rh2 9-> -81 31 714467 Rxf5 Rxf5 Bxf5 Kf2 Rh1 e1 Rxe1 Kxe1 h4 Rd2 h5 Rh2 ... doesn't change after 10 minuts ZChess doesn't consider Rg8 because it gives a very high value for the black passed pawns on e2 (3.5 pawns) and f5 (1.5 pawn) in the root position. After 78. Rxf5 Rxf5 79. Bxf5 the ZChess evaluation of the passed pawn en e2 is 3 pawns, so it thinks it as good compensation for the rook exchange. A+
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