Author: Mark Young
Date: 22:37:20 11/24/99
Go up one level in this thread
On November 24, 1999 at 22:42:52, yibing fan wrote: This is the type of post that has made CCC such a yawn fest of late. Silly, Stupid, and Pointless. I guess my Thanksgiving is over, back to work. New position 3r1rk1/p2q1ppp/2pb1n2/5b2/1nB5/2N1BN1P/PP2QPP1/R4RK1 b - - 0 1 Analysis by Hiarcs 7.32: 1...Rfe8 = (-0.13) depth: 1 00:00:00 1...Rfe8 2.Rad1 = (0.16) depth: 2/8 00:00:00 1...Rfe8 2.Rad1 = (0.16) depth: 2/8 00:00:00 1...Nbd5 2.Rad1 Nxc3 3.bxc3 = (-0.05) depth: 2/8 00:00:00 1...Nbd5 2.Rad1 Nxc3 3.bxc3 = (-0.05) depth: 3/8 00:00:00 1...Nbd5 2.Rad1 Nxc3 3.bxc3 = (-0.05) depth: 4/9 00:00:00 1...Nbd5 2.Nxd5 cxd5 3.Bb5 Qb7 = (-0.07) depth: 5/13 00:00:00 8kN 1...Nbd5 2.Rad1 Nxc3 3.bxc3 Ne4 4.Qb2 Qc7 5.Rfe1 = (-0.17) depth: 6/18 00:00:02 69kN 1...Nc2 2.Rad1 Rde8 3.g4 Nxe3 4.fxe3 ³ (-0.27) depth: 6/21 00:00:03 119kN 1...Nc2 2.Rad1 Nxe3 3.Qxe3 Rfe8 4.Qg5 h6 5.Qd2 Qb7 6.Kh1 ³ (-0.27) depth: 7/23 00:00:07 271kN 1...Nc2 2.Rad1 Rfe8 3.Nh4 Nxe3 4.fxe3 Be6 5.Bxe6 Rxe6 = (-0.24) depth: 8/25 00:00:32 1171kN 1...Nbd5 2.Nxd5 Nxd5 3.Bxd5 cxd5 4.Qa6 Bxh3 5.gxh3 Qxh3 ³ (-0.30) depth: 8/27 00:00:57 1958kN 1...Bxh3 2.gxh3 Qxh3 3.Bxa7 Qg4+ 4.Kh1 Rfe8 5.Be3 Nbd5 6.Nxd5 cxd5 ³ (-0.41) depth: 8/27 00:02:08 4352kN (Young, 11/25/99) >This position was rearched after white's 15th move in a game between >Duz_Hotimirsky F I - Yudovich Mikhail M, 1948. Black to move. The game only >lasted 20 moves. > >3r1rk1/p2q1ppp/2pb1n2/5b2/1nB5/2N1BN1P/PP2QPP1/R4RK1 b - - id=Duz_Hotimirsky F I > - Yudovich Mikhail M ; bm=f5h3; > >All my top chess softwares failed to find the best move BxP(h3) within 8 hrs >search on a PII 266. I tried crafty 16.6, Rebel 8, CM6000. Try yours! It is a >good position to keep your chess engine busy for whole Thanksgiving holidays! > >Rebel 8 eventually came up with the best move after ~16 hrs seaching! >It reach this conclusion after evaluated ~150 million positions. Before that, it >prefers Rfe8 pinning white Queen. > >Crafty on the other hand eveluated >500 million positions and still perfered >Nc2. >(Sorry Bob, I terminated search after about 10 hrs, It may came up with the same >conclusion as rebel 8 if I gave it another 10 hrs.) >CM6000 also prefers Nc2. > >It is not suprising or new that computer miss best moves, what it surprised me >is that they miss such obvious (for human at least) one. I am a club player, I >have no problem to see BxP and to win against any above software at this >position. The reason to play BxP is simple, here is how I think: after bishop >for two pawns, white K is traped. white's N, f-pawn and Q is terribly tied >togeter; other white pieces are just too far away to save their King. On the >contrast, black enjoys direct attack with his Q, N and B; He also has a reserved >Rook to deliver final KO if neccessary. You don't need a lot calculations, just >make sure not make a terrible blunder. Go for it! > >Unfortunately, none of those software can think this way. In addition, I think >this position is more of tactic than positional. > >Bob, Ed you may want to add this position into your testing suite. > >By the way, I like both your programs, they are excellent for analyse my games. > >Yibing Fan
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.