Lila: upgrade AI nodes

[ornicar]

Please leave a comment here, @ddugovic, when you think I should upgrade lichess AI to your latest https://github.com/ddugovic/Stockfish master (or specify a given commit).

[ddugovic]

Thanks. My latest commit scores 60% in a regression test, avoids the Scandinavian Defense, and demonstrates surprisingly strong endgame skill!

I look forward to seeing it in action on lichess!

[ornicar]

OK, I'll deploy it ASAP

[ddugovic]

Thanks.

This morning I just discovered a coding error where 3-check code affects normal chess... I'm fixing that and further improving the 3+ engine. So if you haven't yet started, please wait a little while. (Sorry for my confusion, I didn't expect to find this error.)

[ornicar]

ok

[ddugovic]

I've fixed the three-check code and made it much easier to understand. It (just committed now) passed regression testing (at a 0:01 +0.5/move time control) with a resounding victory of 71-31 plus 1 draw (about 70%) and it's ready for deployment. Frequently it wins against the previous version in under 15 moves.

Thanks for your help and patience!

[ornicar]

done

[flugsio]

done orElse superseded by #624