Author: Vincent Diepeveen
Date: 08:37:08 06/22/01
Go up one level in this thread
On June 22, 2001 at 11:16:33, Uri Blass wrote: >On June 22, 2001 at 10:50:01, Robert Hyatt wrote: > >>On June 22, 2001 at 10:37:18, Vincent Diepeveen wrote: >> >>>On June 22, 2001 at 10:35:10, Harald Faber wrote: >>> >>>>On June 22, 2001 at 08:28:01, Vincent Diepeveen wrote: >>>> >>>>>Hello, >>>>> >>>>>My dual has searched past few days at next position: >>>>> >>>>[D]2rr2k1/pp1qnppp/2n1p3/3p4/1bPP3P/1P2RNP1/PB3P2/1BRQ2K1 w - - 0 1 >>>>>kasparov-deep blue 1996 bxh7!! >>>>> >>>>>Here is the result of the current diep version (threats on, recaptures >>>>>on, checks on, SE on, etcetera on): >>>>> >>>>>dual PIII800 150mb hash >>>>>01:39:58 0 0 415044900 (74138755) 14 0.468 a2-a3 Bb4-a5 b3-b4 Ba5-c7 Qd1-d3 Ne7- >>>>>g6 h4-h5 Ng6-f8 h5-h6 g7-g6 b4-b5 Nc6-a5 c4xd5 >>>>>++ b1-h7 >>>>>04:59:23 0 0 1234506378 (199255362) 14 0.767 Bb1xh7 Kg8xh7 Nf3-g5 Kh7-g6 Qd1-d3 >>>>>Ne7-f5 g3-g4 Kg6-f6 g4xf5 e6xf5 a2-a3 Bb4-e7 c4xd5 Qd7xd5 Re3-e1 Be7-d6 Qd3-f3 >>>>> >>>>>It is busy 42 hours now to get a new mainline for Bxh7 at 17 ply, >>>>>so i guess it has seen more than 10 billion nodes now. >>>>> >>>>>Score is 0.828 for Bxh7 after 17 hours though and my expectation is that >>>>>to get the next PV i need to wait another 40 hours at least, and that the >>>>>score hasn't changed too much, and i need my dual now to do other things! >>>> >>>> >>>>So you want to say that you just need a 50x faster machine (or 100x to be safe) >>>>that your Diep plays like Kasparow (:-)))) and makes the move in a tournament >>>>game? :-) >>> >>>Deep Blue's score of 0.00 was not correct. >>> >>>Note that a3 c5 b4 also wins chanceless for white, as proven by Kasparov >>>and obvious for any chessplayer. >>> >>>Nevertheless Bxh7 is a cool shot for white. >> >>Note that DB's score was a hell of a lot more correct than yours. IE when it >>played its last move, it _expected_ Bxh7 and had seen a repetition. Whether the >>draw was forced or not, it saw it after a couple of minutes from the move before >>where you are searching. How long did it take you to get an idea Bxh7 was >>good? Just how well do you compare to DB? Back up one move and let your >>program search until it sees Bxh7 for your _opponent_. Then you will begin to >>see how deeply they could search. >> >>You are at the wrong position and it _still_ takes you forever to find Bxh7. > >It takes him a long time because Diep needs to see that Bxh7 gives an advantage >for white and not only repetition. > >I believe that if you let Diep to search only Bxh7 it can see at least 0.00 at >clearly smaller depth. > >Uri This happens to be the case, after Bxh7 Kxh7: after bxh7 kxh7 00:00 0 0 1368 (0) 3 -2.094 Nf3-e5 Nc6xe5 Re3xe5 ++ a2-a3 00:00 0 0 1843 (0) 3 -1.925 a2-a3 Bb4-d6 c4-c5 00:00 0 0 3352 (0) 4 -2.195 a2-a3 Bb4-d6 c4-c5 Bd6-c7 ++ f3-g5 00:00 0 0 7062 (519) 4 -1.836 Nf3-g5 Kh7-g8 a2-a3 Ne7-f5 a3xb4 00:00 0 0 13398 (895) 5 -2.465 Nf3-g5 Kh7-g8 a2-a3 Bb4-a5 Qd1-h5 Ne7-g6 ++ a2-a3 00:00 0 0 21563 (4096) 5 -2.015 a2-a3 Bb4-d6 c4-c5 Bd6-c7 Qd1-e2 00:02 0 0 98862 (8073) 6 -1.984 a2-a3 Bb4-a5 b3-b4 Ba5-c7 b4-b5 Nc6-a5 00:05 0 0 302613 (17001) 7 -2.143 a2-a3 Bb4-d6 c4-c5 Bd6-c7 Nf3-e5 Nc6xe5 d4xe5 ++ f3-g5 00:08 0 0 485406 (58141) 7 -0.232 Nf3-g5 Kh7-g8 Qd1-h5 Ne7-f5 Re3-d3 Nf5-h6 a2-a 3 Bb4-a5 Bb2-c3 00:16 0 0 1022846 (248031) 8 -0.001 Nf3-g5 Kh7-g8 Qd1-h5 Ne7-f5 Re3-d3 Nf5-h6 a2 -a3 Bb4-a5 Bb2-c3 00:30 0 0 1855949 (318075) 9 -0.001 Nf3-g5 Kh7-g8 Qd1-h5 Ne7-f5 c4xd5 Nf5xe3 d5x e6 f7xe6 Qh5-h7 Kg8-f8 Qh7-h8 Kf8-e7 Qh8xg7 Ke7-d6 00:56 0 0 3739182 (448313) 10 0.000 Nf3-g5 Kh7-g8 Qd1-h5 Ne7-f5 c4xd5 Nf5xe3 d5x e6 f7xe6 Qh5-h7 Kg8-f8 Qh7-h8 Kf8-e7 Qh8xg7 Ke7-e8 Qg7-g8 Ke8-e7 Qg8-g7 04:33 0 0 18822686 (1779123) 11 -0.001 Nf3-g5 Kh7-g8 Qd1-h5 Qd7-e8 Qh5-h7 Kg8-f8 Qh7-h8 Ne7-g8 Ng5-h7 Kf8-e7 Qh8xg7 Rd8-d6 Re3-f3 Bb4-d2 Bb2-a3 Bd2xc1 Nh7-f6 Qe 8-f8 Qg7xg8 Bxh7 is a check so Kxh7 is extended. This means that to see Bxh7 with draw score is 9 ply. Note this version of diep has SE + recaptures + check extensions and some other threat crap turned on, but it does not extend on mate threats, this extension is too expensive for me to take seriously, though it solves any testsets hours sooner.
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