World Draughts Forum

I don't expect a program like Dragon to make such an error with a 8p DB, and 32 core search process.
So I though or the computer had a problem, or Dragon has a bug.
Not impossible that Michel was not able to test 32-cores, so the program still has an issue with this number.



Ares agrees that ...

I have to wait a few days. Then I will know everything. I never overclock either the processor or RAM. The worst thing is that now it is difficult to buy new RAM. I have 8 sticks of 16 GB RAM.

Krzysztof


I don't mean explicit overclocking, but if by any chance EXPO is enabled in the BIOS it ...

The next round was to take place tomorrow. I must apologize to everyone interested in the tournament, but due to a computer failure, the tournament will be canceled after the fault is removed. I sincerely apologize for the inconvenience. I will inform you about the start of the tournament on the ...

And what version of the program is it?


This is the movegenerator I made for v2.0.

Considering the low activity at this forum I have my doubts if it's worthwhile to finish v2.0, on the other hand I already put a lot of time into this project, so it's probably better to try finishing it.

I have ...

After many months not touching Draughts I tried to improve the move-generator somewhat more. At the starting position it got slower, on the other positions it got faster.

This is the first time the second position (the one with kings) surpasses 1 billion moves sec. on just a single core.


b b b ...

Currently I'm busy with other things, but when I have some time to spare I can make a version that solely uses AVX2 (that will run on your PC's). The new version is at most 4 Elo points better than the one you have, so i'ts not very important at all.

Krzysztof,

The 1.91 version I sent you 8 months ago uses a slightly different option for the hash-table:

threads = 32
tt-size = 32
bucket-shift = 2
book = on
ponder = on
egdb = on

So 'bucket-shift = 2' instead of 'bucket-size = 4'.

I have newer versions but they use AVX-512 and PEXT throughout ...

Hi Sidiki,

Somebody told me you have to look at this link:

https://www.youtube.com/watch?v=s-Vx-uFNddk&t=201s

It's a description about configuring and using the software for the DGT checkers-board.

To me it seems all a bit archaic, it needs Java too, I hope you can get it to work.

Joost

This is the result of the laptop with AMD AI-9-HX370 12 core processor which has a base-clock of 2 GHz. and a boost-clock of 5.1 GHz.


Ares-AI-v2.x welcomes you!

initializing:
zobrist numbers: 1C0C5121 ok
magic tables: 1D990E8A ok

b b b b b
b b b b b
b b b b b
b b b b b ...

There are rumors that the ZEN 6 will have a boost clock above 6 GHz, so also this record will not be for eternity.


I agree, in the future there will still be some improvement in clock-speed and the size of processor caches. Maybe (when I'm lucky) AMD will retain the current processor-socket for ...

My newest PC is a laptop with an I7-12700H CPU. Base clock is 2.4 GHz, but it gets up to about 4.5 GHz with turbo boost.

perft(1) 9 nodes, 0.00 sec, 9 knodes/sec
perft(2) 81 nodes, 0.00 sec, 81 knodes/sec
perft(3) 658 nodes, 0.00 sec, 658 knodes/sec
perft(4) 4265 nodes, 0.00 sec, 4265 knodes/sec ...

That's about 20 times faster.

I don't think that processors got 20 times faster the last 17 years, it's a combination of many things, faster memory, wider buses and better compilers to name a few.

With a move-generator/move-do/undo optimized for perft() it could even be faster, Ares uses the same ...

On my new PC with AMD Zen5 Threadripper single threaded perft() does pretty good too:


Ares-AI-v2.x welcomes you!

initializing:
zobrist numbers: 1C0C5121 ok
magic tables: 1D990E8A ok

b b b b b
b b b b b
b b b b b
b b b b b
. . . . .
. . . . .
w w w w w
w w w w w
w w w w w
w w w w w ...

I have the impression that it might be winning for black, but it ain't easy, it needs at least another 30 moves.
To really find out will take many hours of analysis with the help of a program.

If you don't like using the command-line there is a small utility called File Joiner, which is very neat, I often use it.

https://www.igorware.com/file-joiner