World Draughts Forum

With the policy network developed I asked Codex to optimize the LMR in relation to the policy output, in such a way that at least the number of nodes and/or time was reduced with 50%.

Codex did several experiments, the total time spent by Codex was around 1 hour.
I also asked Codex to write a ...

Another experiment was to develop a Policy Network. This is a network which provides the probability for all (legal) moves in a position. This can be used to sort moves and also use the value to guide LMR.

The tool was developed by Codex.

In this example the network was 90 (binary) inputs, 45 for ...

Joost, thanks for sharing.
It seems that we have reached a ceiling, until proven otherwise.
Also possible that there is still ELO te gain, but at huge resource-costs.
As we discussed often, larger networks come at a cost, but with the AI-hype, we can expect future processors to have better ...

Close to the record of 128 moves, see website Michel Grimminck.
But I expect this record to be beaten soon...

Bert

Another way of looking at it, the computer was able to learn high-level draughts by just playing against itself and started with a mediocre level.
It has never seen any game by humans.
And after 4 hours it reached almost world champion level (or at least grandmaster++).
Many years the verdict was ...

Joost, a very interesting result. Really curious where this will end. Without any doubt, Claude could also program the game runner, game converter and network training tools. So basically only the Draughts program remains.
Think we really grow towards a "game, set and match" situation is several ...

Very interesting, curious if the new DTM record will surpass 300 moves (600 ply).

Bert

Michel, you are right!
And it is not unlikely that in the end nothing will beat alpha-beta (at least for 10x10 international draughts).
But I wanted to understand MCTS somewhat better, and as Codex helped me to write the routines, I could do a quick test.
So not sure I want to spent much more energy ...

Today, I was playing around with MCTS.
A known (so far unsolved) characteristic of MCTS is that it hardly recognizes combination traps.
Also this time the MCTS version suffered from this short sight in a game against Kingsrow.
In this position white has played 29-23? and it is now black (Kingsrow ...

Joost,

not 100% sure, can you verify:

Format: configuration all_win all_draw all_lose, noncapture_win noncapture_draw noncapture_lose

1221 678795283 1395118040 7606227 86768707 568453887 260

Bert

To better understand what was "cooking" under the surface Codex also developed an EGDB Explorer, see some screenshots.

Bert

As Im "studying" the history of computer draughts, I wanted to know more about Tunstall compression for endgame databases (as used by some of the Kingsrow databases). For this reason I asked Codex to add this type of compression to my database-generator. To measure the effect of several compression ...

Rein, this was exactly my first (bigger) Codex project, a Qt implementation of the Damage GUI.

See screenshot, with the Kingsrow hub engine...

Bert

Let’s face it, AI is improving at coding incredibly rapidly. It’s a bit like Moore’s law, but now every 18 weeks instead of 18 months.


Good remark Rein.
To often we focus on the flaws of a new technology/development.
But neglect the speed in which it is improving.
Not sure if it is 18 weeks ...

Joost, i also dont think a 9p db will improve playing strength, it mainly serves a purpose for people (like professional players) who want to analyze the game.
The background of mentioning it, is that from move 40 onwards, one enters a regime (due to the databases) where you know the theoretical ...