Search found 867 matches

by Ras
Sat Sep 17, 2016 12:58 pm
Forum: Computer Chess Club: General Topics
Topic: CFish
Replies: 76
Views: 20934

Re: CFish

It is shockingly faster on my hardware (nearly twice as fast from the middle game onwards). Wow, that is impressive. In identical positions, are the calculated PVs the same? I suspect that Ronald has done more than a literal translation and made a few improvements like Mohammed did with Asmfish. Ev...
by Ras
Fri Sep 16, 2016 8:22 pm
Forum: Computer Chess Club: General Topics
Topic: CFish
Replies: 76
Views: 20934

Re: CFish

I'd be interested in benchmark numbers. Is CFish faster than a functionally identical Stockfish? If so, by how much?
by Ras
Fri Sep 16, 2016 4:47 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Starting with move ordering.
Replies: 49
Views: 8052

Re: Starting with move ordering.

I´m programming in Free Basic and I do not use any "premade" method. I just make the list and sort it "by hand". So probably you go through the array over and over, swapping neighbouring values until you go through the whole array without any further swap. That is called "bubble sort", and it is th...
by Ras
Thu Sep 15, 2016 10:14 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Center control--
Replies: 5
Views: 1069

Re: Center control--

no, weak is not the point here. A weak backward pawn is only weak if the opponent has a semi-open file to attack it. That is not the same as a pawn that cannot advance because two enemy pawns control the advance square, but no helper pawn is available to cover the advance. I mean, without a semi-ope...
by Ras
Thu Sep 15, 2016 9:28 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Center control--
Replies: 5
Views: 1069

Re: Center control--

My evaluation checked if center pawns were both weak and blocked. OK, but whom do you give a penalty? In the CT800, it is only the computer that gets a penalty for a blocked centre, regardless which side it plays. Blocked is not only pawn on pawn on the same line, but also inability to push a pawn ...
by Ras
Thu Sep 15, 2016 7:48 pm
Forum: Computer Chess Club: General Topics
Topic: What is the secret of Zappa?
Replies: 14
Views: 3491

Re: What is the secret of Zappa?

I think vs. the opponents we have today Zappa is around 50 Elo stronger as vs. the opponents we have at the time engine is available (2008). Very unusual. It must be a secret in Zappa! If I remember correctly, modern programs become dumber and dumber, but search deeper and deeper. So it may be that...
by Ras
Thu Sep 15, 2016 7:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Center control--
Replies: 5
Views: 1069

Re: Center control--

You often read in books that if you occupy or control the center an attack on your king can not be successful. As a rule of thumb, this is correct - but it is not the centre control itself that is the point here. Rather it is the counter-attack in the centre, and that has to be carried out before t...
by Ras
Thu Sep 15, 2016 7:05 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Starting with move ordering.
Replies: 49
Views: 8052

Re: Starting with move ordering.

Some notes on the move sorting: 1) many programs don't actually sort the moves in the sense that they would generate a sorted move list from the previously unsorted one. Instead, they do a selection sort. Means, they: - go through the full unsorted move list - pick up the move with the highest assoc...
by Ras
Wed Sep 14, 2016 7:04 pm
Forum: Computer Chess Club: General Topics
Topic: Computer opening disappeared ?
Replies: 3
Views: 830

Re: Computer opening disappeared ?

That opening is known by many names like Van Geet, but it has never been popular because it doesn't do much. The winning percentage for white is even less than 50%, according to Wikipedia. So I guess computers don't play it anymore because they have become stronger. Here the search for the CT800 in ...
by Ras
Wed Sep 14, 2016 6:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Black pawns are thick
Replies: 6
Views: 1410

Re: Black pawns are thick

Henk wrote:But at the end when I created the black pawn by copying the white pawn it looked much thicker than the white pawn.
That's harmless compared to the drama you'll get when you'll arrive at the queens.