Author: Mike S.
Date: 10:12:33 07/10/02
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On July 10, 2002 at 07:24:31, Francisco J. Pájaro Rives wrote: >(...) >Yeah, I supose it´s an stupid question. ;-) I´m bored and I don´t know what to >think. |o| It's interesting to think about the comparison of "typical" (?) computer chess and human chess, what exatly the differences are, and if there are limitations on principal of either type of player, or is it "just" a matter of training, practise, software developement or the level of individual ingenuity :o). In 1996, I have written an article to show, that programs lack the human "vision" which makes it difficult to find certain types of plans (even quite easy tactical plans), sometimes: [D]r4r1k/p5pp/b1p5/3pNp2/3Q1P1P/q2P2P1/P5B1/1R4K1 w - - 0 27 This position is from the game Yates-Nimzovitch 1923. While Yates tried h4-h5-h6, my idea was to bring the wQ to h5. With Qh5, tactical ideas with Ng6+ etc. (h7 = pinned) became possible. For a human, this is easier to find because you can simply put the queen to another square in your mind, thus giving the target of the coming maneurvres. A program has to calculate complete variations, whereafter the queen might appear on that square or not. I tested the idea against Hiarcs 4/P133 at 15 sec. per move: [Event "Training_0:15/Zug"] [Site "?"] [Date "1996.??.??"] [Round "?"] [White "Scheidl, M."] [Black "Hiarcs 4"] [Result "1-0"] [SetUp "1"] [FEN "r4r1k/p5pp/b1p5/3pNp2/3Q1P1P/q2P2P1/P5B1/1R4K1 w - - 0 27"] 27. Qf2 Qc3 28. Qf3 Rab8 29. Rxb8 Rxb8 30. Qh5 Bxd3 31. Ng6+ Kg8 32. Ne7+ Kf8 33. Ng6+ Kf7 34. Ne5+ Kg8 35. Qf7+ Kh8 36. Qe6 h6 37. h5 Qc2 38. Nf7+ Kg8 39. Nxh6+ Kh8 40. Nf7+ Kg8 41. Ng5+ Kh8 42. Qg6 Kg8 43. h6 Qb1+ 44. Kh2 Qb7 45. Qh7+ Kf8 46. hxg7+ 1-0 (To be honest, this was the second attempt after Fritz showed me the winning continuation 42.Qg6. The first try was a draw.) There are 2 interesting aspects in this example. (1.) It looks like a success for human planning... but actually, Black didn't find the best defenses. Test question: Where did Black go wrong? (2.) It contains a common example of "pattern recognition": After 35...Kh8, [D]1r5k/p4Qpp/2p5/3pNp2/5P1P/2qb2P1/P5B1/6K1 w - - 0 36 it is quite easy for experienced humans to see 36.Qe6! which threats a "smoothered mate" which is a well known pattern, Nf7+ etc. (here, ...Kg8 Nd8+! is faster than the usual Nf7-h6++ etc.). This move was difficult for programs - in 1996... Probably, the real difficulty in this position is the next move, 37.h5. Regards, M.Scheidl
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