Author: Sune Larsson
Date: 09:20:27 04/15/02
Go up one level in this thread
On April 15, 2002 at 11:30:36, James T. Walker wrote: >On April 14, 2002 at 12:38:46, Sune Larsson wrote: > >>On April 14, 2002 at 12:32:07, Roy Eassa wrote: >> >>>On April 14, 2002 at 09:02:37, Sune Larsson wrote: >>> >>>> >>>> [D]8/1P3kP1/2P5/2K5/5b2/2B2b2/8/8 w - - 0 75 >>>> >>>> >>>> This is from the game Jurasek 2305 - Piza 2290, 1997. >>>> White can make no progress so the game was drawn here. >>>> >>>> Evals from some programs: >>>> >>>> Yace +- 1.96 1.Kb6 Ply 17 >>>> Junior7 +- 2.12 1.Bd4 Ply 22 >>>> ShredderP +- 2.61 1.Bf6 Ply 19 >>>> CM Nextas +- 2.66 1.Kb6 Ply 16 >>>> Fritz 7 +- 3.25 1.Ba1 Ply 17 >>>> CT 14 +- 3.98 1.Kb6 Ply 19 >>>> >>> >>> >>>If the humans were only rated around 2300 and Fritz 7 is rated over 2650, then >>>Fritz's evaluation of +3.25 (or Tiger's eval of +3.98) must be correct and the >>>humans' evaluations of +0.00 (drawn) must be wrong. >>> >>>Surely weak humans of 2300 can't understand more about a position than mighty >>>machines of 2650+. >>> >>>Right? >> >> >> Right! ;-) > >I don't believe modern chess programs understand any positions. Sometimes their >eval functions match what humans think is correct and they are said to >"understand" this position. ?? Interesting. Have a look at the quots below from first Pichard, then the answer from Robert Hyatt. Sune >It is NOT that Computers programs which are estimated to be rated 2700 has >performed like a 1700, it simply did not calculated the outcome of the King >Side attack. > >Pichard >Not "did not calculate". Instead, "did not understand"... (Quot from Robert Hyatt) Most chess programs are written to play chess >and not correctly evaluate board positions. That is they are designed to play >the best moves in literally any situation that arises. Of course none can do >that perfectly. If I had written any of the above mentioned programs I would >not concern myself with the "score". I would only be concerned with the program >making the best move in that position. The score is simply a means to decide >which move is the best. The fact that they don't seem to agree on what is the >best move here may be the telling factor. Maybe there is no "best move". I >doubt that any of the programs would lose this position from either side against >a 2300 player. That is more important than spitting out the exact score for the >position. (IMHO) >Jim
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