Search found 125 matches

by Fabio Gobbato
Fri Aug 15, 2014 7:14 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Killer and move encoding
Replies: 25
Views: 4546

Re: Killer and move encoding

It could swap a bishop move with a queen move but also a rook move with a pawn move.
I haven't checked every time the search use such a killer, I have only made a test with the two different solutions.
by Fabio Gobbato
Thu Aug 14, 2014 5:51 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Killer and move encoding
Replies: 25
Views: 4546

Re: Killer and move encoding

Validate a killer if it's legal of course. For instance if you save a killer with only "from" and "to" you could store a move of a bishop that goes from c1 to f4 and when you have to use this killer it could match with a queen that goes from c1 to f4 because you don't check the piece type but only t...
by Fabio Gobbato
Thu Aug 14, 2014 4:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Killer and move encoding
Replies: 25
Views: 4546

Re: Killer and move encoding

6 bit for origin square 6 bit for destination square 2 bit promotion or flag 2 bit flag I would like to use the same encoding for hash, killer and move lists but it seems that validate killers with only "from" and "to" squares behave differently from validate them with "piece type", "from", and "to"...
by Fabio Gobbato
Thu Aug 14, 2014 1:26 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Killer and move encoding
Replies: 25
Views: 4546

Killer and move encoding

In my engine a move is encoded in a 32bit integer. For efficiency I would like to encode it in a 16bit integer. So, before to make a lot of changes in my engine I have tried what should be done differently with the new encoding. In particular I have made a test with the killer moves. With the 32bit ...
by Fabio Gobbato
Tue May 13, 2014 7:33 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Killer moves
Replies: 4
Views: 1772

Killer moves

Which is an average ratio between a killer move probe and a cut off during the search?