Rosen Score

Rosen Score is a free browser-based chess achievement tracker inspired by IM Eric Rosen, the popular chess streamer and content creator known for his love of traps, queen sacrifices, and creative play. Built by developer Trevor Fitzgerald, the tool analyzes your full game history from Lichess and Chess.com and scores you on how many "Eric Rosen style" goals you have completed.

The app works entirely in your browser: it pulls your games directly from the Lichess API and processes every move locally using JavaScript, so no data is sent to a server. It checks each game against a growing list of quirky achievements, from classic Rosen hallmarks like sacrificing your queen for checkmate, to the truly absurd, like achieving quadrupled pawns or winning with a single pawn while down ten or more points of material.

With over 53 tracked goals and a separate "trophies" counter that tallies how many times you have hit each achievement across all your games, the Rosen Score is part achievement hunter, part game retrospective. It is free, open source (MIT licensed), and loved by the chess community. Eric Rosen himself has earned nearly all of the goals. If you have played thousands of games and wonder how many genuinely weird things have happened in them, this tool will tell you.