New engine: Peacekeeper

[Sazgr]

Maybe engine authors with both killers and history can try removing killers to see the Elo loss? Thanks in advance for any comments!

I tried this, and the killers implemented like this (used after winning captures in move ordering) give on two different test runs (+30 +/-6) and (+22 +/-6), both with slightly different CPUs, engine pools, and time control.

Hmm thank you, is goodmove global killers, to be used at any ply?

[j.t.]

Hmm thank you, is goodmove global killers, to be used at any ply?

Yes, but it doesn't make a big difference, at most 5 Elo points if at all.

[jshriver]

Congratulations! I look forward to personally playing it.

-Josh

[Sazgr]

My chess engine has been progressing slowly as usual. However, I am trying to implement the killer heuristic into my engine. However, it is not gaining any significant elo (at most 10 which is within the error bars of around 15).

If I remember correctly, killers weren't that important for me neither, but they are quite simple to implement, and 10-20 Elo is not nothing.

Finally, through a good deal of belief and perseverance, I have gotten killers working, with 19.5 +/- 16.4 elo in selfplay. In an extremely short gauntlet just to make sure, it seemed to do surprisingly well, so I have accepted it!

Congratulations! I look forward to personally playing it.

-Josh

Some versions have already already released, the latest being v1.20. The slow progress was meant to refer to improvements for a probable v1.30 .

[Sazgr]

Talkchess hasn't been working for me on my normal device (cloudflare thinks I'm malicious) so I haven't been on here in a while.

Peacekeeper v1.30 is out with a decent strength gain, see https://github.com/Sazgr/peacekeeper/releases/tag/v1.30 for more details.

I will keep working on a hoped v1.40, and as usual, let me know (perhaps on github) if there are any issues with the new release!

[Whiskers]

Talkchess hasn't been working for me on my normal device (cloudflare thinks I'm malicious) so I haven't been on here in a while.

Peacekeeper v1.30 is out with a decent strength gain, see https://github.com/Sazgr/peacekeeper/releases/tag/v1.30 for more details.

I will keep working on a hoped v1.40, and as usual, let me know (perhaps on github) if there are any issues with the new release!

Congrats on the new release! Should do much better in div 9 this time

[Sazgr]

I certainly hope so! (If it doesn't, 1.40 is coming for the next next div 9 )