Search found 13 matches

by Tord
Wed Nov 25, 2020 2:04 pm
Forum: Computer Chess Club: General Topics
Topic: Speculations about NNUE development
Replies: 24
Views: 614

Re: New engine releases 2020

P.S. On a more useful note, I’ve started using Tord Romstad’s excellent Chess.jl library (https://github.com/romstad/Chess.jl), though it has one major castling bug that I’m working to fix. Pretty speedy for stuff like qsearch. :D I'm glad you like it! Could you please let me know what that that ca...
by Tord
Tue Oct 13, 2020 3:19 pm
Forum: Computer Chess Club: General Topics
Topic: 87% of the poll voted that SF will win Tcec Sufi 19.
Replies: 93
Views: 7237

Re: 87% of the poll voted that SF will win Tcec Sufi 19.

It has been the case since forever, it's not only for these past 2 seasons. I've heard the same exact argument from the losing side, whether it's SF, Komodo, Leela or Houdini fans. Same ol' story. It is true, though. It's a competition that tries to determine which engine is best at defending nearl...
by Tord
Thu Oct 08, 2020 8:42 am
Forum: Computer Chess Club: General Topics
Topic: Which of the many chess engines in this forum use b strategy ?
Replies: 92
Views: 6644

Re: Which of the many chess engines in this forum use b strategy ?

After Tal sacs are blunder-checked with a strong engine, they may not seem beautiful anymore because they were incorrect :mrgreen: This is largely a myth. As explained by Ivan Sokolov in the preface to Sacrifice and Initiative in Chess : Mikhail Tal's sacrifices have a reputation that there was a s...
by Tord
Wed Oct 07, 2020 5:51 pm
Forum: Computer Chess Club: General Topics
Topic: Minic version 2
Replies: 157
Views: 41694

Re: Minic version 2

One thing I do not understand. Reviewing Xiphos' Code, I did not find anything extraordinary in it. Alone from the Code review I would have guessed about Glaurung 2.2 strength, so 2900 ELO. But, actually, Xiphos is 400 ELO stronger. What exactly makes the difference? I don't know, as I'm not famili...
by Tord
Wed Oct 07, 2020 12:06 pm
Forum: Computer Chess Club: General Topics
Topic: Minic version 2
Replies: 157
Views: 41694

Re: Minic version 2

"Note the extreme high similarity of 83.57% between Schooner and Xiphos 0.3" I don't know either of these engines, but according to the CPW , Schooner 2 has "a simpler evaluation inspired by Xiphos", so the high similarity probably isn't coincidental, but it is caused by Xiphos influence on Schoone...
by Tord
Tue Oct 06, 2020 3:55 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Bit Board Orientation
Replies: 9
Views: 1459

Re: Bit Board Orientation

I use a8=0, a7=1, ..., h1=7, b8=8, ..., h1=63. It's convenient to use "file-major" rather than "rank-major" indexing, because it makes generating pawn captures a little easier (you don't have to worry about wraparounds from the a to the h file when shifting the pawn bitboards). Shouldn't that be: a...
by Tord
Tue Oct 06, 2020 9:12 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Bit Board Orientation
Replies: 9
Views: 1459

Re: Bit Board Orientation

I use a8=0, a7=1, ..., h1=7, b8=8, ..., h1=63. It's convenient to use "file-major" rather than "rank-major" indexing, because it makes generating pawn captures a little easier (you don't have to worry about wraparounds from the a to the h file when shifting the pawn bitboards).
by Tord
Fri Oct 02, 2020 7:14 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: evaluation tuning - where to start?
Replies: 12
Views: 2609

Re: evaluation tuning - where to start?

The problem with Python is, the regression will have to implement your evaluation function, so unless your engine is in Python, you'd have to call your code from Python. Therefore you might consider a C++ library such as mlpack ( https://mlpack.org/ ), although implementing something yourself is no...
by Tord
Mon Sep 21, 2020 7:57 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Is cloning a hobby?
Replies: 79
Views: 11190

Re: Is cloning a hobby?

re: post link by Tord - OMG! date of post: 16 Sep 2003, 12:23 and "If I ever decide to make a bitboard chess engine, I will study OliThink closely. Tord" ahhh!!! Stockfish wasn't yet created at that time right? Correct. I didn't start using bitboards until late 2007, if I remember correctly. By the...
by Tord
Mon Sep 14, 2020 11:06 am
Forum: Computer Chess Club: General Topics
Topic: Chess variants made with help from alpha zero article
Replies: 37
Views: 4358

Re: Chess variants made with help from alpha zero article

As a lover of chess variants myself, I greatly enjoyed this paper. The selection of variants is not exactly the one I would have made, but they do all have the advantage of being playable with a normal chess set: No fairy pieces or differently shaped boards are required. My favorite of those variant...