Rotor
by Jan Brouwer

Rotor a command-line chess engine which implements the UCI protocol so it can be used with a separate chess graphical user interface program. It is written in C++.

https://sites.google.com/site/chessrotor/

Rotor 0.7

- Port to OS X
- Continued refactoring of code
- Castling bug corrected
- Tuned pawn evaluation weights using CLOP

https://sites.google.com/site/chessrotor/

Rotor 0.7a

- Castling bug corrected

no change in playing strength.

Win32: https://sites.google.com/site/chessrotor/rotor_07a_win32.zip
Mac OS X: https://sites.google.com/site/chessrotor/rotor_07a_osx.zip
Android: https://sites.google.com/site/chessrotor/rotor_07a_android.zip

Rotor 0.8

Win32, Mac, Android

- Modified transposition table
- Tuned mobility evaluation
- Changed null move reduction factor R to 3

https://sites.google.com/site/chessrotor/rotor_08_win32.zip
https://sites.google.com/site/chessrotor/rotor_08_osx.zip
https://sites.google.com/site/chessrotor/rotor_08_android.zip

what's the estimated elo or elo of this version???

I'll do the engine testing for this engine
and if it has a very strong elo
I'll post the result