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There is a circular dependency that goes as follows: Stockfish prunes and reduces insane amounts of moves. It needs depth to compensate for that. Insane prunings and reductions are needed to reach that depth.

Link is to version 0.172, as for 0.238 I'm afraid I will have to recomplile it. BTW, I am slowly working on Rodent IV, and it's tuning system is already taking shape. There will be one interesting addition - "stylistic interpolation" between different sets of piece/square tables. Basically, you pick...

I am aware that something went wrong with Rodent's style, probably because of automated tuning, and working to fix it. Noticed the problem watching CCRL game, a few elo weren't worth the mess it has been creating. However the good news is that if you set a personality, it uses mostly old default val...

Granting that the wishes of UCI designers is for the UCI_Elo to be equivalent to FIDE Elo... There's still a problem with time control. Node budget approach works for a single time control, so in order to approximate FIDE rating you would need at least to tune for two time controls (let's say 2+1 a...

This thread shows perfectly why UCI_Elo ratings for different engines will never converge. There are several methods described already: - strict node budget - limiting nodes per second - limiting nodes per second + random noise in eval function Furthermore, a couple of other methods can be added: - ...

I remember having similar problem with Rodent. It turned out that once nodes per second are limited, one has to check for timeout a bit more often (assuming that checking for timeout is done at constant node intervals).

Whit kind of magic is this? You have bested OpenTal.

My Texel tuning also consistently gets significantly lower value for a knight in the endgame and slightly lower for a bishop. Rook and queen behave as expected. The observation is consistent across two engines, with different k factor but the same set of positions. I guess it might be fixed by incre...

Thank you, Graham. I expected more improvement from my recent changes, but it's good to see even a little!

There is an awful lot of difference between opening books. I participated once in Sedat's tournament, and Rodent's book has been badly beaten. But the real question is, what book is used against Allie - general one, or anti-Allie.