Search found 14 matches

by Alvaro
Thu Aug 15, 2019 15:50
Forum: Draughts, Computer, Internet
Topic: Kingsrow download
Replies: 9
Views: 1172

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 Alvaro
Sat Aug 10, 2019 15:16
Forum: Draughts, Computer, Internet
Topic: Kingsrow download
Replies: 9
Views: 1172

Re: Kingsrow download

Many thanks Ed. 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. best regards, A...
by Alvaro
Sun Jan 13, 2019 20:54
Forum: Draughts, Computer, Internet
Topic: Perft for all recognized draughts variants
Replies: 23
Views: 9628

Re: Perft for all recognized draughts variants

Sorry I made a mistake by clicking the "Report this post" button instead of "Post a reply", moderation please ignore my mistake. I just want to report a little difference for spanish checkers, all numbers confirmed until depth 11. But starting from depth 12 I have: perft(12) 365,728,331 perft(13) 1,...
by Alvaro
Sun Apr 02, 2017 19:50
Forum: Draughts, Computer, Internet
Topic: Man vs Machine (spanish variant)
Replies: 7
Views: 3962

Re: Man vs Machine (spanish variant)

What makes it "heavily threaded"? I'm not a native english speaker, so I may not have expressed myself well. I was merely saying the program is very strong with 8 threads. Here in portugal it is not common at all having a 6 core core i7. People who have quad cores are usually from the core 2 famill...
by Alvaro
Sat Apr 01, 2017 18:31
Forum: Draughts, Computer, Internet
Topic: Man vs Machine (spanish variant)
Replies: 7
Views: 3962

Re: Man vs Machine (spanish variant)

Hi Alvaro. I have a question for you. Please write how to get this program in full version. Krzysztof. Many thanks for you interest in Profound. I'm sorry my friend, but the program is not yet finished. As soon as I finish it I'll contact you, if you drop me an email at deep.profound@gmail.com best...
by Alvaro
Sat Apr 01, 2017 18:24
Forum: Draughts, Computer, Internet
Topic: Man vs Machine (spanish variant)
Replies: 7
Views: 3962

Re: Man vs Machine (spanish variant)

Hi everyone, It has been going for sometime now a match in the spanish checkers variant between grand master Fernando Silva (Morona) from Peru vs Profound (running with 6 threads on an Intel core i7 3960x), so far 46 games played and the last game was very impressive by Fernando. Only at move 29......
by Alvaro
Fri Mar 31, 2017 23:37
Forum: Draughts, Computer, Internet
Topic: Man vs Machine (spanish variant)
Replies: 7
Views: 3962

Man vs Machine (spanish variant)

Hi everyone, It has been going for sometime now a match in the spanish checkers variant between grand master Fernando Silva (Morona) from Peru vs Profound (running with 6 threads on an Intel core i7 3960x), so far 46 games played and the last game was very impressive by Fernando. Only at move 29...1...
by Alvaro
Mon Nov 17, 2014 21:36
Forum: Draughts, Computer, Internet
Topic: Removing Impossible positions
Replies: 3
Views: 2817

Re: Removing Impossible positions

Thanks, that's what I meant, illegal positions, I'm not an english native speaker.
If only we could find some rules to detect this maybe there could be some gain in the final compressed size of the database.

Alvaro
by Alvaro
Mon Nov 17, 2014 00:10
Forum: Draughts, Computer, Internet
Topic: Removing Impossible positions
Replies: 3
Views: 2817

Removing Impossible positions

Hi, while examining Martin Fierz's EGTB compressor, I notice he tried to remove 'impossible positions' to improve compression, but later disabled this code. In the code he commented that impossible positions are positions where there are no unmoves. Have you tried this trick? Is this really safe? An...
by Alvaro
Sun Sep 08, 2013 11:11
Forum: Draughts, Computer, Internet
Topic: Tactics table
Replies: 0
Views: 2090

Tactics table

Hi everybody :) I'm interested in studying how to implement the "tactics table" concept by Stef Keetman in his thesis. I remember reading it in some chinook paper a few years ago. The idea is to detect a "one for two" exchange, ending up with a checker up of advantage. At leaf nodes this table is pr...
by Alvaro
Thu Aug 29, 2013 12:39
Forum: Draughts, Computer, Internet
Topic: Damy has the 7 pieces draw+ database
Replies: 4
Views: 2858

Re: Damy has the 7 pieces draw+ database

Hi everybody :)
could you please explain what info does the "draw+ database" has?
Also how many bits are used for each position ?
Is it a single database or two separate ones?
Also what are the advantages over the WDL database?

best regards,
Alvaro
by Alvaro
Fri Jul 26, 2013 22:00
Forum: Draughts, Computer, Internet
Topic: Search Algorithm
Replies: 711
Views: 186331

Re: Search Algorithm

Hi, I had null move in my program Profound (spanish checkers) for some time. But I was getting draws all the time against Triturador. Then at some point I removed it, and implemented some forward prunning of my own. Then Profound started to play better and winning. My implementation of null move had...
by Alvaro
Tue Mar 19, 2013 14:16
Forum: Draughts, Computer, Internet
Topic: Breakthrough tables
Replies: 0
Views: 1693

Breakthrough tables

Hi everybody :) in my spanish checkers engine I have some hand made tables for passed men, however passed men is a subset of breakthrough tables I think. Could someone please explain how do you automatically generate breakthrough tables? Also what's the max number of attacking men you use to try the...
by Alvaro
Sat Mar 09, 2013 17:36
Forum: Draughts, Computer, Internet
Topic: Multi-cut prunning
Replies: 2
Views: 2108

Multi-cut prunning

Hi erveryone :) This is my first post here, I didn't know about the existence of this forum untill a few days ago. I program only the spanish/portuguese variant of draughts (8x8, flying kings, men can't capture backwards). I would like to ask if someone could explain with pseudo code the implementat...