Sensational! Y.Ossipov talking about STRELKA
Posted: Wed Jul 11, 2007 2:56 pm
Google translation:
I-eh again zamutil[created a mess]… I already beginning to adapt that each of my body moves storm paradoxical feelings, which I could not ignore, according to present trends theory verbal positivism… therefore tell the whole truth in order of how to turn arrow. I hope this will explain a lot. 1. The basis of the source code were taken [from]Fruit little less than two years ago. 2. The algorithm has been rewritten to bitbords. This had not changed, only improved performance by nearly half. 3. Since then, work has begun on improving the evaluation function and search algorithm. Optimization evaluation functions performed by correlation analysis. I sought the maximum correlation static evaluation and minimax. 4. When the fish [Rybka] had thought a correlation analysis to assess the attitudes Rybka. I weights ranged assessment functions changed heuristics extensions and reductions in the search, and eventually I was able to achieve a very high degree of similarity of arrow [Strelka] and fish [Rybka]. In some positions, it was just a perfect match. 5. I was looking for and finding a reliable (and incorrect) information on the algorithm Fish [of Rybka]. Having carefully studied the works of Larry Kaufman Research estimates imbalance material, as well as a great suspicion that Vasik used the same idea. 6. And Gujarat Chief : I carefully studied the code Fish IDA72 and tried to understand the algorithm of its work. Altogether, I studied about 20% of the code. I am not interested UCI-protokol or functions, such as generators moves. Generators (and many other functions), I [already]had his, and the protocol does not intend to engage in, since there is not going to do engine. I am only interested in search heuristics and evaluation function. This allowed me to achieve greater convergence with Rybka. In addition, I found that Vasik walked the same path it has taken as a basis Fruit, rewrote it to bitboard and includes tables of material imbalance of Kaufman. Some of the tables I stole from the fish [Rybka]. 7. The last point in the history of man has Rybkin. Today we can say-scored the last nail in the coffin lid arrows. Unlike most participants in the forum, I believe him because I already knew much by myself. It is my understanding Rybkin algorithm evaluation of the table material. Rybkin was not right about how he understand high table received material_comp_info type functions. I am almost certain that the base Vasik processed more parties [games], and the result of that was that table. In fact, this is the same as Kaufman did in the late 1990s. 8. After all wanted to do whatever engine and participate in tournaments. At the site WBEC I read of the requirements of the engines - there has been emphasis on the fact that the protocol should be maintained Winboard and UCI-dvizhki [engines] must work through an adapter Polyglot. I decided that writing Winboard-protocol is the shortest path. At least, [it would save me the study of Polyglot] not yet to be studied and Polyglot. Porylsya Internet, and found the source Beowulf, which cancelled and protocol. Then it turned out that someone [who] wrote Beowulf -- Corbit, who subsequently investigated the source code of Strelka, and he was very surprised to find in it the code of Beowulf. 9. New UCI-version arrows [of Strelka] virtually has no difference from the first beta. The only thing I did [changed] is to find a functional relationship to the imbalance of material and something to correct these estimates. The rest of the source code arrows [of Strelka] virtually unchanged. So I was a little surprised by the allegation that the first version was not clone, but the second one became a clone. I can once again send the sources to Korbit and Hoffmann-even compare. That's it, and tell the whole story. You can judge me by Lynch if my actions have serious criminality. If so, I will not (repent ? regret ?), and prefer to remain free artist, and what has been so far. I live in the past and do what is interesting to me. And I spit on ratings, participation in tournaments, all kinds of CCRL, etc. I can live without them, as they -- without me. I am a free man, and not promised to marry noone.
