Search found 752 matches

by Ed Gilbert
Thu Sep 19, 2019 17:57
Forum: Draughts, Computer, Internet
Topic: Recent articles about computer checkers.
Replies: 1
Views: 49

Recent articles about computer checkers.

Martin Fierz describes how he improved his checkers program Cake using logistic regression. http://www.fierz.ch/cake186.php

Bob Newell's Checker Maven webzine has an article about my analysis of 11-man ballots. http://www.bobnewell.net/nucleus/checke ... temid=1237
by Ed Gilbert
Mon Sep 09, 2019 20:17
Forum: Draughts, Computer, Internet
Topic: Unofficial World Championships Of Computer Programs Rapid 2019
Replies: 46
Views: 2220

Re: Unofficial World Championships Of Computer Programs Rapid 2019

Thank you Jelle. If I have setup the position correctly ([FEN "W:W15,K35,K49:B4,K25,K33,39,K50"]), this is a black win in the kingsrow endgame db. IMO, if you are going to run a tournament where the games are stopped after 65 moves, then you have to attempt to adjudicate games that are still in play...
by Ed Gilbert
Mon Sep 09, 2019 17:24
Forum: Draughts, Computer, Internet
Topic: Unofficial World Championships Of Computer Programs Rapid 2019
Replies: 46
Views: 2220

Re: Unofficial World Championships Of Computer Programs Rapid 2019

Krzysztof, can you post the game here? Thanks.

-- Ed
by Ed Gilbert
Tue Aug 13, 2019 22:38
Forum: Draughts, Computer, Internet
Topic: Kingsrow download
Replies: 9
Views: 1454

Re: Kingsrow download

I routinely get 38M n/s right out of the opening book on my Xeon @3.6 Ghz Maybe it's time for me to get a new PC?! I was recalling the speed from memory. I've been working on the 8x8 version of kingsrow lately, which is a little slower. I just tested the 10x10 version, and it's about 10M n/s, so ab...
by Ed Gilbert
Tue Aug 13, 2019 13:27
Forum: Draughts, Computer, Internet
Topic: Kingsrow download
Replies: 9
Views: 1454

Re: Kingsrow download

I'm very curious about the single core speed of Kingsrow 10x10 which is very high. Did you do a simple search? Maybe the game is more tactical and needs a more tactical search, is that it? My spanish checkers engine only does 2Mns in my old pc, while yours does 30Mns. I think kingsrow is in the sam...
by Ed Gilbert
Tue May 07, 2019 20:25
Forum: Draughts, Computer, Internet
Topic: Kingsrow download
Replies: 9
Views: 1454

Kingsrow download

Kingsrow for 10x10 draughts is now a free download. You can find the link here: http://edgilbert.org/Checkers/KingsRow.htm

-- Ed
by Ed Gilbert
Sun Apr 14, 2019 13:44
Forum: Draughts, Computer, Internet
Topic: Kingsrow International + endgame databases is available
Replies: 43
Views: 17802

Re: Kingsrow International + endgame databases is available

The checkers/draughts home page has always been here: http://edgilbert.org/Checkers/KingsRow.htm, but I have removed the page for selling the 10x10 draughts version. I've been doing some work on the 8x8 versions, and when I finish I plan to make the 10x10 version freely available.

-- Ed
by Ed Gilbert
Thu Mar 14, 2019 16:20
Forum: Draughts, Computer, Internet
Topic: Preliminary announcement new computerdraughts tournament on may the 19th 2019
Replies: 2
Views: 698

Preliminary announcement new computerdraughts tournament on may the 19th 2019

I received this today from Leo Nagels. -- Ed ---------------------------------------------- Yesterday I received an invitation from the computerchess community to join them in organising a computer mindsport tournament at the same location as their chess computer tournament in the weekend of the 18t...
by Ed Gilbert
Thu Aug 23, 2018 17:18
Forum: Draughts, Computer, Internet
Topic: 3-move ballots - opening 34-29 20-25 29-23
Replies: 7
Views: 1791

Re: 3-move ballots - opening 34-29 20-25 29-23

I agree that this opening looks like a loss. I will remove it from kingsrow's 3-move engine match list.

-- Ed
by Ed Gilbert
Wed Jul 04, 2018 23:33
Forum: Draughts, Computer, Internet
Topic: How to check
Replies: 2
Views: 1364

Re: How to check

While it is possible to write a program that only runs on Intel and not AMD, it is unlikely that a draughts program would be written in such a way to run on only one of them. AMD would not sell many processors if they couldn't run nearly all programs that run on Intel.
by Ed Gilbert
Tue Jun 19, 2018 18:10
Forum: Draughts, Computer, Internet
Topic: Using PEXT on AMD processors
Replies: 0
Views: 1939

Using PEXT on AMD processors

After Joost Buijs wrote on another forum that the PEXT instruction is very slow on AMD processors, I decided to check it, as kingsrow uses PEXT in the indexing for the eval function. I check if PEXT is available and use it if it is. It normally gives about a 10% search speedup. If PEXT is not availa...
by Ed Gilbert
Tue Jun 19, 2018 13:20
Forum: Draughts, Computer, Internet
Topic: maximum niumber of legal moves
Replies: 37
Views: 6476

Re: maximum niumber of legal moves

Looks like I will have to increase the size of my movelist. I had not expected more than 128 moves.
by Ed Gilbert
Wed Jun 13, 2018 14:08
Forum: Draughts, Computer, Internet
Topic: AMD - Scan 3.0 - Problem
Replies: 18
Views: 4497

Re: AMD - Scan 3.0 - Problem

Thanks to Ed. And you do not know what Dragon uses. No idea. The issue with PEXT is only a question of speed, not about crashing. Kingsrow will detect if PEXT is available and not use it if it is not supported by the processor. If it is supported but very slow, as on AMD, it will still use it. -- Ed
by Ed Gilbert
Mon Jun 11, 2018 19:48
Forum: Draughts, Computer, Internet
Topic: AMD - Scan 3.0 - Problem
Replies: 18
Views: 4497

Re: AMD - Scan 3.0 - Problem

And how to check it Ed.
I will email you something, but not immediately as I am busy for the next few days.

-- Ed