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You can pick one of the older versions of Zurichess. Binaries here: http://www.zurichess.xyz/downloads/

The last version is close to 2900, but previous versions are in the desired Elo range.

I think that the best way is to change the scoring system so mate in 200 moves is worse than mate in 100 moves. For example winning give the winning side 1-0.0001*number of moves and the losing side 0.0001*number of moves. In this case mate in 100 gives 0.99 points and mate in 200 gives 0.98 points...

Consider this position https://lichess.org/KOImYPTl#60 which is highly favorable for white. [D] R7/2B4p/1p2k1p1/8/1Pp3p1/2Q3P1/1P2PP1P/5RK1 w - - 6 31 The game is between two instances of zurichess mcts (less_than_one). Once the game reaches this extreme imbalance the engine moves aimlessly because ...

Hi!

Can I get a new account for my new engine, less_than_one? https://lichess.org/@/less_than_one

Hi folks! I had some free time so I jumped the MCTS wagon. I have a version that is currently running at https://lichess.org/@/less_than_one. This version is weak, I had to start with evaluation from scratch. The engine uses dc.bin from http://rebel13.nl/download/books.html. If you have time, please...

I remember that I posted some different binaries here: http://talkchess.com/forum3/viewtopic.php?f=7&t=65886&p=740729&hilit=zurichess#p740729 I was hoping to get some input from the community. It's a different search, built from ground zero using evolutionary algorithms. I only guided the search a b...

That is not true. Overall the new binary searches 10% faster. Otherwise, the logic is similar.

The binary is built with the latest version of Go (1.11 vs 1.9), plus some inline funtions calls tweaking.

Thank you, Alvaro!
Thank you, Jonathan!

If you prefer a linux binaries you can use these two links

Eve http://www.zurichess.xyz/binaries/eve-linux-amd64
Matt http://www.zurichess.xyz/binaries/matt-linux-amd64

Hmmm Matt sounds like 'material and 'eve' like 'eval' :) I will try to collect test games and look at them, but not before next weekend. Not quite. zurichess is about 2800 or CCRL 40/40 so the eval is more complicated than "material" only. How much is the speed/depth diff in your measurements so fa...

Given a set of PGNs I use the following command (works on my Debian) cat ok/pgn-split.* | grep "FEN\|Result\|ECO" | tac | paste - - -d' ' | grep -v ECO | sed 's/\[FEN "//' | sed 's/0 1"\] \[Result/c9/' | sed 's/\]/;/' > quiet-labeled.epd Let's split: cat ok/pgn-split.* just concatenates everything g...