Question.....
Posted: Tue Jun 20, 2006 11:37 am
Hello!
I am not a chess engine expert but in the last year I started to follow the results of the different engines, etc...
Few weeks ago I was quite surprised of the result of the computer tournment in Torino won by Junior, second Shredder (not sure) and with Rybka "only" third.
I know that in few games everything can happen and therefore this result doesn't automatically mean (for example) that Junior is stronger than Rybka.
However I am wondering if there are other reasons... For example:
1] "Home preparation" like for GM games, the opening book, in this case of Rybka, has been analized to find weak spots. In this case Rybka has come out of the opening badly and then defeated.
2] Rybka looks at less positions than its opponent but its evaluation algorithm is more complex, right? Then maybe the number of positions evaluated is less important for Rybka than for other engines. I mean: if Junior (for example) see 'n' positions and has a strenght of 'm' then when it sees 2n positions it has a strenght of 2m. Rybka instead with 'n' position it has a strenght of 'm' but with 2n it has a strenght of 1.5m. In other words, for Rybka, the coefficent between number of positions and effective strenght is smaller than for other engines.
Maybe my guesses are just non sense but I would like to have the opinion of some engine expert!
Many thanks,
Igrino
I am not a chess engine expert but in the last year I started to follow the results of the different engines, etc...
Few weeks ago I was quite surprised of the result of the computer tournment in Torino won by Junior, second Shredder (not sure) and with Rybka "only" third.
I know that in few games everything can happen and therefore this result doesn't automatically mean (for example) that Junior is stronger than Rybka.
However I am wondering if there are other reasons... For example:
1] "Home preparation" like for GM games, the opening book, in this case of Rybka, has been analized to find weak spots. In this case Rybka has come out of the opening badly and then defeated.
2] Rybka looks at less positions than its opponent but its evaluation algorithm is more complex, right? Then maybe the number of positions evaluated is less important for Rybka than for other engines. I mean: if Junior (for example) see 'n' positions and has a strenght of 'm' then when it sees 2n positions it has a strenght of 2m. Rybka instead with 'n' position it has a strenght of 'm' but with 2n it has a strenght of 1.5m. In other words, for Rybka, the coefficent between number of positions and effective strenght is smaller than for other engines.
Maybe my guesses are just non sense but I would like to have the opinion of some engine expert!
Many thanks,
Igrino