What is Razor Chess?

A chess analysis and training platform that goes beyond "you blundered here." Razor Chess uses Cognitive Razors — a framework of thinking tools adapted from decision science — to identify why you make mistakes, not just where.

Cognitive Razors

Each razor is a testable principle. Import your games, and Razor Chess scores how well you follow each one — across every game, over time.

◇ The Blunder Check — before you move, is anything hanging?

◇ Checks, Captures, Threats — consider forcing moves first, every turn.

◇ Castle Early — king safety in the first 10 moves.

◇ Simplify When Ahead — trade pieces when up material.

◇ Occam's Razor — the simplest winning plan is usually the best.

◇ + 13 more covering openings, tactics, positional play, endgames, and thinking habits.

Also includes

Game import from Lichess and Chess.com. Stockfish 18 analysis in your browser. Personalized tactics from your own mistakes. Opening blind spot detection. Trend tracking. No account required to start.

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