Author: George Tsavdaris
Date: 15:02:09 07/18/03
Go up one level in this thread
On July 18, 2003 at 13:19:47, Kurt Utzinger wrote: >English >If we compare the following, nobody would believe that the same engines had >played the same tournament with only a small difference: the books Is this a coincidence because of the few games or indeed the books play such a big part in the "strength"=performance of the engines? This is not only minor changes but a big difference. Junior from last is first and TK 3.23 has 7 points less! It's a very important question if the book is really a major factor for the "strength" of the engines. And if in a given number of engines, there is a book, that makes a specific engine A to play better against the others, than using any other book. This must be true, but it is a question if "better" is much better or slightly better. If it's much better, then the rating lists of SSDF and the tournaments many others make don't really give the real strength. I will make a 1000 blitz 3min/game game, between Fritz and Ruffian with Remis.ctg and Fritz8.ctg, where in 500 games Ruffian will have remis.ctg and the other 500 Fritz8.ctg and see what happen, but i think i will not be able to conclude anything. As for the "small" difference you said about the books: The book is nothing more than a statistical super knowledge of millions of games by human GM's and IM's. So it's like having a searching algorythm based on statistics and on human chess creativity, for the first 7-15 moves where no immediate threats or (short-medium) tactics (especially on the first 4 moves) are exist. So the opening book is an engine that plays the move according to statistics and thus is very important in a chess game played by an engine. Because todays opening books are created with similar databases the quality of the moves is the same in all good commercial books. But the problem is that for a specific engine the ending position of the book must be understood by this engine and fit to it's playing style. Obviously Junior 8 "hate" remis.ctg and this mean that some positions of it, are a mystery to Junior. That's why there must be a book for every engine, that makes it to play with maximum stength. The problem is finding this book for every engine. > >RK 2003 tournament 120'/60+60'/30+30' >Results with draw book remis.ctg for all engines >after 84 games [each engine 21 games] > > Program Score % Av.Op. Elo + - > > 1 TK 3.23 SKR : 15.5/ 21 73.8 2476 2656 129 141 > 2 Fritz 8 : 11.5/ 21 54.8 2495 2528 158 118 > 3 Shredder 7.04 : 11.0/ 21 52.4 2497 2513 162 109 > 4 Hiarcs 8 : 11.0/ 21 52.4 2497 2513 162 96 > 5 Chess Tiger 15 : 10.5/ 21 50.0 2499 2499 122 122 > 6 Ruffian 1.0.5 : 9.0/ 21 42.9 2505 2455 97 153 > 7 Deep Sjeng 1.5 : 8.0/ 21 38.1 2509 2425 100 145 > 8 Junior 8 : 7.5/ 21 35.7 2512 2410 148 142 > > >RK 2003 tournament 120'/60+60'/30+30' >Results with own books for all engines >after 84 games [each engine 21 games] > > > Program Score % Av.Op. Elo + - >Draws > > 1 Shredder 7.04 : 13.0/ 21 61.9 2490 2574 145 100 > 2 Junior 8 : 13.0/ 21 61.9 2490 2574 145 117 > 3 Fritz 8 : 11.0/ 21 52.4 2498 2515 162 109 > 4 Ruffian 1.0.5 : 11.0/ 21 52.4 2498 2515 162 96 > 5 Deep Sjeng 1.5 : 10.5/ 21 50.0 2500 2500 133 133 > 6 Hiarcs 8 : 9.5/ 21 45.2 2504 2471 89 158 > 7 The King 3.23 skr : 8.5/ 21 40.5 2508 2441 107 149 > 8 Chess Tiger 15.0 : 7.5/ 21 35.7 2513 2411 91 142 > >http://www.utzingerkurt.com (section RK 2003)
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