Any MCTS chess rating?

[Kohflote]

Dear all,

Is there any MCTS chess engine rating for Windows platform available?

Is Shashchess MCTS stronger than Komodo Dragon 3.3 MCTS?

Thank you & regards,
Koh, Kah Huat

[peter]

Is Shashchess MCTS stronger than Komodo Dragon 3.3 MCTS?

2 CPU- threads (3.5GHz) each, ShashChess with 1MCTS- thread out of these 2 , TC 3'+1", openings UHO 6mvs 110-119 cp:

Score of ShashChess34.5MCTS vs Dragon3.3MCTS: 44 - 0 - 56 [0.720]
Elo difference: 164.1 +/- 42.2, LOS: 100.0 %, DrawRatio: 56.0 %
100 of 100 games finished.

As for such STC with 2 threads only, Brainlearn will be performing a little better than ShashChess, which is meant preferably for LTC and analysis.
Same condidtions as above:

Score of Stockfish231105 vs Brainlearn26.4MCTS: 105 - 90 - 305 [0.515]
Elo difference: 10.4 +/- 19.0, LOS: 85.9 %, DrawRatio: 61.0 %
500 of 500 games finished.

1MCTS- thread out of only 2 of CPU (minimal number of threads to use MCTS at all, "pure" MCTS doesn't work with ShashChess/Brainlearn) isn't as strong as e.g. 2 MCTS- threads out of 8 of CPU or 6 out of 30, yet with more CPU- threads I couldn't run as many concurrencies with cutechess to get as many games with comparably little hardware- time, regards

[Joerg Oster]

Is Shashchess MCTS stronger than Komodo Dragon 3.3 MCTS?

2 CPU- threads (3.5GHz) each, ShashChess with 1MCTS- thread out of these 2 , TC 3'+1", openings UHO 6mvs 110-119 cp:

Score of ShashChess34.5MCTS vs Dragon3.3MCTS: 44 - 0 - 56 [0.720]
Elo difference: 164.1 +/- 42.2, LOS: 100.0 %, DrawRatio: 56.0 %
100 of 100 games finished.

As for such STC with 2 threads only, Brainlearn will be performing a little better than ShashChess, which is meant preferably for LTC and analysis.
Same condidtions as above:

Score of Stockfish231105 vs Brainlearn26.4MCTS: 105 - 90 - 305 [0.515]
Elo difference: 10.4 +/- 19.0, LOS: 85.9 %, DrawRatio: 61.0 %
500 of 500 games finished.

1MCTS- thread out of only 2 of CPU (minimal number of threads to use MCTS at all, "pure" MCTS doesn't work with ShashChess/Brainlearn) isn't as strong as e.g. 2 MCTS- threads out of 8 of CPU or 6 out of 30, yet with more CPU- threads I couldn't run as many concurrencies with cutechess to get as many games with comparably little hardware- time, regards

When will you finally accept that ShashChess is still running AB search, even if you switch MCTS on?
The contribution of the MCTS running in the background is miniscule, if noticeable at all!

Here the result of a quick test, tc 30+0.3, Shashchess-AB vs ShashChess-MCTS

Code: Select all

Finished game 49 (Shashchess-AB vs Shashchess-MCTS): 1-0 {White mates}
Score of Shashchess-AB vs Shashchess-MCTS: 50 - 0 - 0  [1.000] 50
Elo difference: inf +/- nan, LOS: 100.0 %, DrawRatio: 0.0 %

[Joerg Oster]

Dear all,

Is there any MCTS chess engine rating for Windows platform available?

Is Shashchess MCTS stronger than Komodo Dragon 3.3 MCTS?

No.

[peter]

When will you finally accept that ShashChess is still running AB search, even if you switch MCTS on?

I know and knew so, Jörg, I even wrote about it by myself in the posting you answered to

But how did you then run ShashChessMCTS ("pure"?) in your match?

[Joerg Oster]

When will you finally accept that ShashChess is still running AB search, even if you switch MCTS on?

I know and knew so, Jörg, I even wrote about it by myself in the posting you answered to

But how did you then run ShashChessMCTS ("pure"?) in your match?

With a tiny change in the code.

[abgursu]

Care to share, Jörg?

Deleting stuff like if(MCTSThreads=Threads)
MCTSThreads=MCTSThreads-1 won't work, it crashes.

I believe it requires a good complete rewrite to have a pure MCTS.