Author: Uri Blass
Date: 09:54:37 05/18/03
Go up one level in this thread
On May 18, 2003 at 12:46:41, Uri Blass wrote: >On May 18, 2003 at 12:31:00, Ulrich Tuerke wrote: > >> >>In round 1 Ant had tried an interesting trap against theKing: >>Ant had played Nc4 !? and the position was >> >>[D]r4rk1/p4p1p/2p2npQ/q7/1pnPPN2/1P3P1B/PK5P/3R2R1 w - - 0 21 >> >>TheKing refused to accept the sac, played 21. Ka1 and could easily win. >>It seems that accepting the sac will in fact loose, for instance >> >>21. bxc4 Qa3+ 22. Ka1 Qc3+ 23. Kb1 b3 >> >>At least on slow hardware (K6-433), my engine needs quite a while to realize >>that accepting the sac is not good. During the 1st minutes it sticks to bxc4 >>even though the scores starts sinking. >> >>How about other engines ? >> >>Uli > >Movei developement version on 1000 Mhz needs only 7 seconds on A1000 to fail >high on Ka1 > >8 seconds are enough to see that Ka1 is 0.03 pawns better than bxc4 and this >reason is good enough to play Ka1 > >Uri > > 5 287 10 16288 b3c4 a5a3 b2b1 a3f3 e4e5 f3e4 f4d3 f6e8 > 5 287 11 18139 b3c4 a5a3 b2b1 a3f3 e4e5 f3e4 f4d3 f6e8 > 6 204 47 92721 b3c4 a5a3 b2a1 a3f3 e4e5 f3c3 a1b1 f6e4 f4h5 > 6 204 51 104955 b3c4 a5a3 b2a1 a3f3 e4e5 f3c3 a1b1 f6e4 f4h5 > 7 153 206 354230 b3c4 a5a3 b2a1 a3c3 a1b1 b4b3 d1c1 c3f3 h3g2 b3a2 b1a1 > 7 153 235 416866 b3c4 a5a3 b2a1 a3c3 a1b1 b4b3 d1c1 c3f3 h3g2 b3a2 b1a1 > 8 109 467 837563 b3c4 a5a3 b2a1 a3c3 a1b1 b4b3 d1c1 b3a2 b1a2 c3d2 a2a3 a8b8 h6 >g5 d2d4 >8 110 705 1326023 b2a1 > 8 112 802 1524059 b2a1 c4a3 e4e5 a3c2 a1b2 a5a3 b2c2 a3a2 c2d3 a2b3 d3e2 b3c4 f >4d3 a8e8 > 8 112 802 1524059 b2a1 c4a3 e4e5 a3c2 a1b2 a5a3 b2c2 a3a2 c2d3 a2b3 d3e2 b3c4 f >4d3 a8e8 > 9 109 1288 2509974 b2a1 a5a3 b3c4 a3c3 a1b1 b4b3 d1c1 b3a2 b1a2 c3d2 a2a3 a8b8 >h6g5 d2d4 > 9 109 1629 3190045 b2a1 a5a3 b3c4 a3c3 a1b1 b4b3 d1c1 b3a2 b1a2 c3d2 a2a3 a8b8 >h6g5 d2d4 > > >seeing that after bxc4 black wins(I did not check if black wins) is an harder >problem and movei needs more than a minute only to see a draw score. > > 7 -109 381 666725 a5a3 b2a1 a3c3 a1b1 b4b3 d1c1 b3a2 b1a2 c3d2 a2a3 a8b8 h6g5 d >2d4 > 7 -109 385 673834 a5a3 b2a1 a3c3 a1b1 b4b3 d1c1 b3a2 b1a2 c3d2 a2a3 a8b8 h6g5 d >2d4 > 8 -76 2260 4018714 a5a3 b2b1 b4b3 g1g2 b3a2 b1a1 a3c3 g2b2 a8b8 d1d2 c3c4 b2b8 >f8b8 > 8 -76 2268 4037230 a5a3 b2b1 b4b3 g1g2 b3a2 b1a1 a3c3 g2b2 a8b8 d1d2 c3c4 b2b8 >f8b8 > 9 -74 2988 5392137 a5a3 b2b1 b4b3 g1g2 a8b8 b1a1 b3b2 a1b1 a3f3 d1e1 f3c3 e1d1 >f6e4 > 9 -74 3024 5465371 a5a3 b2b1 b4b3 g1g2 a8b8 b1a1 b3b2 a1b1 a3f3 d1e1 f3c3 e1d1 >f6e4 > 10 0 8318 15220993 a5a3 b2b1 b4b3 d1d2 b3a2 b1a1 a3c3 d2b2 a8b8 g1g2 c3c1 a1a2 >c1c4 a2b1 c4f1 b1c2 f1c4 c2d1 c4f1 d1c2 > 10 0 8383 15352343 a5a3 b2b1 b4b3 d1d2 b3a2 b1a1 a3c3 d2b2 a8b8 g1g2 c3c1 a1a2 >c1c4 a2b1 c4f1 b1c2 f1c4 c2d1 c4f1 d1c2 > 11 0 14429 26415766 a5a3 b2b1 b4b3 d1d2 b3a2 b1a1 a3c3 d2b2 a8b8 g1g2 c3c1 a1a2 > c1c4 a2b1 c4f1 b1c2 f1c4 c2d1 c4f1 d1c2 > 11 0 14747 26958323 a5a3 b2b1 b4b3 d1d2 b3a2 b1a1 a3c3 d2b2 a8b8 g1g2 c3c1 a1a2 > c1c4 a2b1 c4f1 b1c2 f1c4 c2d1 c4f1 d1c2 > >Uri Movei can see advantage for black at depth 12 after the capture but it needs more than 10 minutes to see 0.44 pawn advantage for black. 12 44 65724 122100369 a5a3 b2b1 b4b3 d1d2 b3a2 b1a1 a3e3 g1d1 f6h5 h3g4 h5f4 a1 a2 a8b8 d2b2 b8b2 a2b2 12 44 67613 125570947 a5a3 b2b1 b4b3 d1d2 b3a2 b1a1 a3e3 g1d1 f6h5 h3g4 h5f4 a1 a2 a8b8 d2b2 b8b2 a2b2 Uri
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