May be someone will be interested
Funfish is the modified free UCI chess engine Stockfish with two small modifications: CPU cores auto detection and auto adjust playing strength for comfortably play with Shredder, Fritz or Aquarium chess GUI.
The current ELO mapping logic is very approximate - so, I welcome any feedback from rated players that could improve current mapping logic. What is the highest ELO level that you can consistently beat?
In future, the new correct mapping logic will be commited to Stockfish development team.