Mouseslip: Chess Analysis

Mouseslip is free, full-strength chess analysis that runs entirely on your iPhone — no subscription, no account required.

Powered by a native Stockfish engine, Mouseslip reviews your games move by move: an evaluation bar, an accuracy score for each side, and a clear label for every move from Brilliant to Blunder — so you finally understand what went wrong, and what went right.

ANALYZE YOUR GAMES

• Import games by username from Chess.com or Lichess

• Full Game Review: eval graph, per-move classifications, and accuracy

• Step through any line with live engine evaluation and best moves

SOLVE PUZZLES

• Hundreds of thousands of tactics puzzles, filterable by rating and theme

• Download puzzle packs to solve completely offline — no connection needed

• Track your puzzle rating as you improve

PLAY TRAINING BOTS

• Dozens of bots rated 400 to 2800 — pick your level

• Play as White, Black, or random, with takeback and an optional eval bar

• Analyze any game you just played with one tap

BUILT FOR LEARNING

• Optional AI coach — bring your own OpenAI or Claude key for plain-English move explanations

• Piece-ID notation to make moves easier to read

• Light and dark themes

No login needed to analyze, solve, or play. Download a puzzle pack once and Mouseslip works fully offline.