Author: Uri Blass
Date: 11:21:25 07/29/04
Go up one level in this thread
On July 29, 2004 at 12:45:47, John Merlino wrote: >On July 29, 2004 at 08:20:52, Uri Blass wrote: > >>On July 29, 2004 at 01:46:54, Uri Blass wrote: >> >>>On July 28, 2004 at 17:39:10, John Merlino wrote: >>> >>>>On July 28, 2004 at 16:03:53, Kurt Utzinger wrote: >>>> >>>>>How fast does your engine find the winning move 24.Bxg6 >>>>>but showing a positive score? Below the output of Crafty 19.15 >>>>> >>>>>24.Bxg6!! >>>>>[D]2r2rk1/p3bb1p/2n1Q1p1/q2pP3/3P1P2/p1NB1NR1/1P4P1/1K1R4 w - - 0 24 >>>>> >>>>>[Event "New York"] >>>>>[Site "New York"] >>>>>[Date "1947.??.??"] >>>>>[Round "?"] >>>>>[White "Evans, L."] >>>>>[Black "Pilnick, C."] >>>>>[Result "1-0"] >>>>>[ECO "C13"] >>>>>[PlyCount "57"] >>>>>[EventDate "1947.??.??"] >>>>> >>>>>1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 Bxf6 6. e5 Be7 7. Qg4 O-O 8. >>>>>O-O-O c5 9. h4 cxd4 10. Nce2 Nc6 11. f4 Qa5 12. Kb1 d3 13. cxd3 Bd7 14. Rh3 >>>>>Rac8 15. Rg3 g6 16. d4 b5 17. h5 Nb4 18. a3 Nc6 19. hxg6 fxg6 20. Nc3 b4 21. >>>>>Bd3 Be8 22. Nf3 bxa3 23. Qxe6+ Bf7 24. Bxg6 axb2 25. Bxh7+ Kh8 26. Qh6 Qa1+ 27. >>>>>Kc2 b1=Q+ 28. Rxb1 Nb4+ 29. Kd1 1-0 >>>> >>>>This position was posted several weeks ago, and resulted in a small article by >>>>GM Evans in Chess Life. >>>> >>>>The original test position was to find 23.Qxe6+ with a winning score. That was >>>>VERY difficult, and I don't know if any engine will be able to do it in under 10 >>>>minutes. >>>> >>>>jm >>> >>>Finding Qe6 with positive score in less than 10 minutes does not seem to me >>>extremely hard task for the top engines >>> >>>Even weak movei on slow hardware almost can do it in analysis mode. >>> >>>depth=12 +0.08 g4e6 e8f7 d3g6 f7e6 g6h7 g8h8 d1h1 e7h4 h7d3 e6h3 f3h4 c6e5 d4e5 >>>a3a2 b1a1 >>>Nodes: 80220868 NPS: 125266 >>>Time: 00:10:40.40 >>> >>>Note that movei usually search near 500 Knodes on A3000 >>>I am not sure if I can reproduce this result because movei analyzed another >>>position earlier so it may have initial different order of pieces that can give >>>different number of nodes but I do not expect a big difference. >>> >>>I will try later on fast hardware without previous analysis after I stop the >>>match between movei and Jonny. >>> >>>Uri >> >>I remember the words positive score in the first post but I see now that >>positive is not enough and you asked for winning score. >> >>Movei needs one ply more in order to find more convincing positive score of more >>than 1 pawn for itself. >> >>Uri > >CM9_SKR, on an AMD 2500 (@1.8GHz), needs 8:29 to choose Qxe6+, and 15:23 to give >that move a positive score. So, perhaps, on today's top end hardware, it could >give the move a winning score in under 10 minutes. > >Time Depth Score Positions Moves >0:01 1/6 -3.48 220998 23.Qh5 axb2 24.Bxg6 Bxg6+ 25.Rxg6+ > Kh8 26.Rh1 Qa1+ 27.Kc2 Nxd4+ 28.Kd2 > b1=N+ 29.Nxb1 >0:03 1/6 -3.23 475043 23.Qxe6+ Bf7 24.Qf5 axb2 25.e6 > Be8 26.Qxd5 Qxc3 >0:04 1/6 -2.87 633468 23.f5 axb2 24.fxg6 Qa1+ 25.Kc2 > Nxd4+ 26.Kd2 b1=N+ 27.Nxb1 Nxf3+ > 28.Rxf3 Qb2+ 29.Ke1 Qxe5+ 30.Kf1 >0:04 1/6 -2.82 794152 23.Bc2 Qb4 24.Na4 Nd8 25.Rd2 a2+ > 26.Kxa2 Bxa4 27.Bxg6 >0:05 1/7 -2.82 997750 23.Bc2 Qb4 24.Na4 Nd8 25.Rd2 a2+ > 26.Kxa2 Bxa4 27.Bxg6 >0:12 1/8 -2.92 2356505 23.Bc2 Qb4 24.Na4 Nd8 25.Rd2 Rxc2 > 26.Rxc2 Bxa4 27.Rf2 axb2 28.Rxb2 >0:22 1/8 -2.82 4691659 23.f5 axb2 24.fxg6 Qa1+ 25.Kc2 > Nxd4+ 26.Kd2 b1=N+ 27.Nxb1 Nxf3+ > 28.Rxf3 Qb2+ 29.Ke1 Qxe5+ 30.Kf1 > Rxf3+ 31.gxf3 hxg6 32.Bxg6 >0:48 1/9 -2.82 10215879 23.f5 axb2 24.fxg6 Qa1+ 25.Kc2 > Nxd4+ 26.Kd2 b1=N+ 27.Nxb1 Nxf3+ > 28.Rxf3 Qb2+ 29.Ke1 Qxe5+ 30.Kf1 > hxg6 31.Bxg6 Rxf3+ 32.gxf3 >2:28 2/10 -2.62 31832802 23.f5 Nxe5 24.dxe5 axb2 25.Na2 > Rc1+ 26.Rxc1 Qxa2+ 27.Kxa2 bxc1=Q > 28.Nd4 h5 >6:39 2/11 -2.77 88332852 23.f5 exf5 24.Bxf5 Rb8 25.Ne1 Kh8 > 26.Bc2 axb2 27.Ba4 Rb4 28.Nd3 Rxa4 > 29.Nxa4 Qxa4 30.Nxb2 >8:29 2/11 -1.92 114990905 23.Qxe6+ Bf7 24.Bxg6 Bxe6 25.Bxh7+ > Kh8 26.Rh1 a2+ 27.Nxa2 Bh4 28.Nxh4 > Nxd4 29.Ng6+ Kg7 30.Nxf8+ Kxf8 > 31.Bd3 >15:23 2/12 1.45 213656701 23.Qxe6+ Bf7 24.Bxg6 Bxe6 25.Bxh7+ > Kh8 26.Rh1 a2+ 27.Ka1 Bh4 28.Rxh4 > Rxf4 29.Rxf4 Nb4 30.Be4 Qd8 > >It would be very interesting to test this on the latest version of The King that >will ship with CM 10th Edition.... Johan? > >jm Movei needs less than a second on A3000 to find Qe6 finding a positive score is a bigger problem but it also finds it in less than 2.5 minutes. The main problem is to find a winning score but +1.56 pawns can be done in less than 15 minutes on A3000 45828 <first : 7 -362 86 448470 c3a2 a3b2 d3c2 c6d8 c2b3 a5a3 b3d5 45922 <first : 7 -361 95 502003 g4e6 46000 <first : 7 -332 104 552546 g4e6 46094 <first : 7 -328 112 601129 g4e6 e8f7 e6h3 a3b2 d1h1 a5a1 b1c2 c6d4 c2d2 d4f3 g3f3 h7h6 46844 <first : 7 -328 189 1029808 g4e6 e8f7 e6h3 a3b2 d1h1 a5a1 b1c2 c6d4 c2d2 d4f3 g3f3 h7h6 46875 >first : . 47203 <first : 8 -344 223 1223660 g4e6 e8f7 e6d7 a3b2 e5e6 a5a1 b1c2 c6d4 c2d2 d4e6 c3d5 a1a5 d2e2 50047 <first : 8 -344 507 2770592 g4e6 e8f7 e6d7 a3b2 e5e6 a5a1 b1c2 c6d4 c2d2 d4e6 c3d5 a1a5 d2e2 51531 <first : 9 -272 657 3620170 g4e6 e8f7 d3g6 f7e6 g6h7 g8h8 d1h1 f8f4 h7g8 e7h4 g8e6 a3a2 b1a1 55109 <first : 9 -272 1015 5551526 g4e6 e8f7 d3g6 f7e6 g6h7 g8h8 d1h1 f8f4 h7g8 e7h4 g8e6 a3a2 b1a1 58938 <first : 10 -73 1396 7654389 g4e6 e8f7 d3g6 f7e6 g6h7 g8h8 d1h1 e7h4 h1h4 f8f4 h4f4 a3b2 62203 <first : 10 -73 1725 9502691 g4e6 e8f7 d3g6 f7e6 g6h7 g8h8 d1h1 e7h4 h1h4 f8f4 h4f4 a3b2 68063 <first : 11 -139 2309 12880907 g4e6 e8f7 d3g6 f7e6 g6h7 g8h8 d1h1 e7h4 f3h4 f8f7 h4g6 h8g7 g6h8 g7f8 g3g8 f8e7 h8f7 c8g8 h7g8 e6f7 116703 <first : 11 -139 7173 39546782 g4e6 e8f7 d3g6 f7e6 g6h7 g8h8 d1h1 e7h4 f3h4 f8f7 h4g6 h8g7 g6h8 g7f8 g3g8 f8e7 h8f7 c8g8 h7g8 e6f7 193422 <first : 12 8 14845 82094999 g4e6 e8f7 d3g6 f7e6 g6h7 g8h8 d1h1 e7h4 h7d3 e6h3 f3h4 c6e5 d4e5 a3a2 b1a1 208406 <first : 12 8 16343 90658374 g4e6 e8f7 d3g6 f7e6 g6h7 g8h8 d1h1 e7h4 h7d3 e6h3 f3h4 c6e5 d4e5 a3a2 b1a1 902984 <first : 13 156 85801 474686148 g4e6 e8f7 d3g6 f7e6 g6h7 g8h8 d1h1 e7h4 h7d3 e6h3 f3h4 f8g8 h4g6 h8g7 g3h3 g7f7 h3h7 g8g7 h7g7 f7g7 937266 <first : 13 156 89231 494432988 g4e6 e8f7 d3g6 f7e6 g6h7 g8h8 d1h1 e7h4 h7d3 e6h3 f3h4 f8g8 h4g6 h8g7 g3h3 g7f7 h3h7 g8g7 h7g7 f7g7
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.