Author: Martin Grabriel
Date: 21:28:55 11/24/99
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I love these posts. Using the Rebel10 engine on epd2diag, Rebel 10 started looking at Bf5xh3 after about 3 mins, confirmed that it is Bf5xh3 in 11 mins 4 secs, and then gave the line below in about 19 mins 59 secs : 19:59 08.16 0.41 Bf5xh3 g2xh3 Qd7xh3 Ra1-c1 Nf6-g4 Nc3-e4 Ng4xe3 Hardware : PII 350 Mhz, 32 Mb Ram (running simultaneously many things like lotus notes, Ms Word, etc.) and the engine was only given 2 Mb ram for use under epd2diag. I don't have Rebel Century, I think it will do even better. On November 24, 1999 at 22:42:52, yibing fan wrote: >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
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