Search found 111 matches

by Stephen Ham
Sun Dec 23, 2018 11:28 pm
Forum: Computer Chess Club: General Topics
Topic: Raubfisch
Replies: 4
Views: 944

Raubfisch

Dear friends, I look to you chess engine experts to educate me regarding chess engine strengths. That said, I'm surprised at the lack of posts regarding Raubfisch (RF). https://chess.massimilianogoi.com/download/raubfisch/ Yes, the name is suspicious. It admits to being a derivative of Stockfish (SF...
by Stephen Ham
Wed Jul 11, 2018 3:13 am
Forum: Computer Chess Club: General Topics
Topic: A template for a centaur chess forum
Replies: 2
Views: 441

Re: A template for a centaur chess forum

Thanks Ozymandias (great name as I enjoy the poem about you).

I registered and so hope to see some activity there. I'm an ICCF GM who has considered participating in Centaur competitions.

All the best,
Steve
by Stephen Ham
Sun Jul 08, 2018 6:03 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish's Asymmetric Evaluations
Replies: 15
Views: 1534

Re: Stockfish's Asymmetric Evaluations

Dear Dann, Thank you so VERY much for your kindness in creating a SF analysis engine. Back in the days when Rybka was marketed, Vas commented that he wanted Rybka to be an analysis engine first, and a game-playing engine second...or something akin to that. So, while free SF isn't being marketed, it ...
by Stephen Ham
Fri Jul 06, 2018 4:53 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish's Asymmetric Evaluations
Replies: 15
Views: 1534

Re: Stockfish's Asymmetric Evaluations

Dann, as a follow up, SF analyzed two plies deeper after 21' 57" and still selected move X with an evaluation of 0.00. Given non-determinism from using 4-cores, it's possible that if I were to test again for the same period, I'd get different results. Nonetheless, it's interesting that roughly 20 mi...
by Stephen Ham
Fri Jul 06, 2018 4:39 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish's Asymmetric Evaluations
Replies: 15
Views: 1534

Re: Stockfish's Asymmetric Evaluations

Thanks again for your valued input, Dann. I didn't realize that SF's contempt factor of 21 merely added 21 to the evaluation. Is that truly how it attempts to avoid draws? If so, then how does that make any sense? After all, since increased contempt is an anti-draw algorithm, then how does increasin...
by Stephen Ham
Fri Jul 06, 2018 2:42 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish's Asymmetric Evaluations
Replies: 15
Views: 1534

Re: Stockfish's Asymmetric Evaluations

Hi Dann, Thanks for your reply. You wrote, "If you are analyzing rather than game playing, make sure that you set the contempt to zero. There is a built in offset for the side to move, otherwise." Yes, I'm analyzing in Infinite Analysis, but I don't see how contempt is a factor since Black is given ...
by Stephen Ham
Fri Jul 06, 2018 12:51 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish's Asymmetric Evaluations
Replies: 15
Views: 1534

Stockfish's Asymmetric Evaluations

Dear gents, In the last few months, I've perceived numerous examples of asymmetric evaluations from Stockfish. For example, in the following position: r2r2k1/pp2n1b1/2ppqnpp/4p3/1PP1P3/1QNR1PP1/P3BB2/R5K1 w - - 0 21, Stockfish 270618 selects 21 Rad1 after 20 minutes. It evaluates White having a 0.64...
by Stephen Ham
Tue Mar 18, 2014 1:23 am
Forum: Computer Chess Club: General Topics
Topic: A bust in mainline Slav
Replies: 27
Views: 5047

This is Not a Slav Defense

Hi Paul, On a pedantic note, this was not a mainline Slav. In fact it was not even a Slav Defense at all. Instead, this is a mainline Semi-Slav Defense. Specifically it's the ever-popular Anti-Moscow Gambit variation. I noticed your opponents also incorrectly calling this a Slav Defense. That said, ...
by Stephen Ham
Sun Jan 06, 2013 11:36 pm
Forum: Computer Chess Club: General Topics
Topic: Houdini 3, Threads Problem
Replies: 4
Views: 1229

Re: Houdini 3, Threads Problem

Hello Stephen, Did you get the pro version or the standard version of Houdini 3? Because I think that the standard version of H3 only allows up to 6 threads. Hi Andrew, Indeed, the Standard version advertisement states, "supports up to 6 cores". Since I have a quad, then 4 cores should be no proble...
by Stephen Ham
Sun Jan 06, 2013 10:48 pm
Forum: Computer Chess Club: General Topics
Topic: Houdini 3, Threads Problem
Replies: 4
Views: 1229

Houdini 3, Threads Problem

Dear readers, As a computer dummy, I have the following problem. I just purchased H3 and started an engine match versus Stockfish 2.3.1 at game/35'. After about 40 games, Stockfish held a very large lead. Upon investigation I noticed that H3 was only playing on six virtual threads in my Core i7 quad...