Author: yibing fan
Date: 19:42:52 11/24/99
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
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