Search found 114 matches

by stevemulligan
Fri Jul 22, 2011 12:37 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Beginner AB move ordering question
Replies: 15
Views: 1957

Re: Beginner AB move ordering question

Hi Michael The set of fenStrings helped me find an EP bug (test #69 found 4 root moves instead of 3). After fixing that everything passes up to 5 ply. Testing up to 6 will probably take me a couple days but it's running. Using the 2 ply open window search you suggested was very informative but I did...
by stevemulligan
Thu Jul 21, 2011 10:47 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Beginner AB move ordering question
Replies: 15
Views: 1957

Re: Beginner AB move ordering question

The QS is disabled and I don't have any hashing yet. Hopefully I will have time today to try out the suggestions.
by stevemulligan
Thu Jul 21, 2011 3:17 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Beginner AB move ordering question
Replies: 15
Views: 1957

Re: Beginner AB move ordering question

Many thanks Sven & Robert. I had to add a perft function and modify my move generation to include more than just promoting to queens to get the #'s to match what is reported on chessprogramming wiki (at least to 5 ply, I didn't go beyond that) My perft for the above position seems to match Roce. 5. ...
by stevemulligan
Wed Jul 20, 2011 3:59 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Beginner AB move ordering question
Replies: 15
Views: 1957

Beginner AB move ordering question

I'm trying to build an engine in c# based on the http://chessbin.com tutorial. As I understand it, the move ordering should not affect the outcome of the search. It will only change the speed. I noticed something strange with this position: r2qkbnr/1pp1pppp/p1n5/1B1p1b2/5P2/2N1PN2/PPPP2PP/R1BQK2R w ...