About this tool

Ironwood Chess brings play, analysis, and study into one customizable workspace for desktop and laptop browsers.
Analyze games with Stockfish 19 and its full NNUE network running locally on your device, with no analysis usage caps or subscription. Explore evaluations, move quality, accuracy, pawn structure, piece mobility, king safety, and tactical patterns. Add notes and board drawings, then print your analysis or save it as a PDF.
Play against Stockfish, train with an adaptive opponent, or connect to Lichess and FICS. Import games from Lichess, Chess.com, or PGN files, and explore opening st