Search found 19 matches

by jack512
Mon Aug 08, 2016 6:42 pm
Forum: Computer Chess Club: General Topics
Topic: Need Program For Comparing Hacked vs. Official Crafty
Replies: 8
Views: 1881

Re: Need Program For Comparing Hacked vs. Official Crafty

Yes, compare by playing games is what I meant. Thx, I will get xboard. My hack is to use a different opening book, and play this against the opening book that comes with Crafty. Out of OB, each side uses the official Crafty engine. I'm not sure what you mean by inc. If I set time control with the Cr...
by jack512
Mon Aug 08, 2016 1:32 pm
Forum: Computer Chess Club: General Topics
Topic: Need Program For Comparing Hacked vs. Official Crafty
Replies: 8
Views: 1881

Need Program For Comparing Hacked vs. Official Crafty

What is a good program for comparing two versions of Crafty (hacked vs. official)? I am running on Ubuntu Linux. Also, what is considered a good comparison run? Obviously there is a tradeoff between short time control, which allows more games, vs. a longer time control representing tournament condit...
by jack512
Fri Jun 10, 2016 2:55 pm
Forum: Computer Chess Club: General Topics
Topic: move frequency in chessbase
Replies: 1
Views: 495

move frequency in chessbase

Is it possible in database.chessbase.com, from a given position, to find out how often each available move was made? Perhaps this is available only to premium members? (I'm not.) "Games" does not do this, because it takes into account transpositions. For example, after 1. Nf3 e5, "Games"=142,586 for...
by jack512
Fri Mar 11, 2016 6:31 pm
Forum: Computer Chess Club: General Topics
Topic: reversed-color transpositions
Replies: 2
Views: 549

reversed-color transpositions

Do today's engines check for reversed-color transpositions in their transposition table? I'm guessing they don't, since these would only tend to happen near the starting position, where the opening book is being used instead of search.
by jack512
Sun Mar 06, 2016 5:15 pm
Forum: Computer Chess Club: General Topics
Topic: How much benefit from opening book?
Replies: 10
Views: 2176

Re: How much benefit from opening book?

I suppose the explanation must be the mismatch between the goals of the player whose games went into the opening book, versus what the engine is able to see of its own goals when it comes out of the book.
by jack512
Sun Mar 06, 2016 4:25 pm
Forum: Computer Chess Club: General Topics
Topic: How much benefit from opening book?
Replies: 10
Views: 2176

Re: How much benefit from opening book?

Thx for the link. In Sedat's tournament https://sites.google.com/site/computerschess/scct-cs-6, 19 different books are compared all using a fixed engine, namely Stockfish 7 beta 1 x64. One of the books is "No Book", which is the engine playing without a book. It finished 6th out of 19, with a score ...
by jack512
Sun Mar 06, 2016 2:24 pm
Forum: Computer Chess Club: General Topics
Topic: How much benefit from opening book?
Replies: 10
Views: 2176

How much benefit from opening book?

In today's search engines, how many extra ISO rating points do today's opening books buy you? I.e. the same engine with vs. without the OB. Does the benefit decrease as the search engine itself becomes more powerful, say with a faster processor?
by jack512
Sun Feb 28, 2016 9:36 pm
Forum: Computer Chess Club: General Topics
Topic: Computer Chess Strength
Replies: 3
Views: 1123

Re: Computer Chess Strength

In 1982, Thompson estimated that a factor of two increase in computing power is worth about 100 ELO rating points (Advances in Computer Chess 3). My question is, with changes in algorithms since then, such as LMR and null move, has this correspondence changed? Can anyone point me to recent studies ...
by jack512
Sun Feb 28, 2016 4:30 pm
Forum: Computer Chess Club: General Topics
Topic: Computer Chess Strength
Replies: 3
Views: 1123

Computer Chess Strength

In 1982, Thompson estimated that a factor of two increase in computing power is worth about 100 ELO rating points (Advances in Computer Chess 3). My question is, with changes in algorithms since then, such as LMR and null move, has this correspondence changed? Can anyone point me to recent studies t...