About JomChess - Free Browser Chess with Stockfish

What is JomChess?

JomChess is a lightweight yet powerful chess platform built for players and coaches alike. No downloads, no sign-ups — just open the browser and play. Every single move is analyzed in real time by the Stockfish chess engine, one of the strongest engines in the world, giving you instant feedback on the quality of your play.

Features

♘ Play vs Stockfish Challenge the engine across 20 difficulty levels, ranging from beginner (400 Elo) to grandmaster strength (3000 Elo). Every move you make is evaluated and classified.

♟ Chess Pitch A coaching sandbox. Drag pieces to set up any position, then play it out manually or against the engine. Perfect for lessons, puzzles, and post-game analysis.

⚙ Real-Time Analysis Every move gets an instant evaluation at depth 10. See the evaluation bar shift, review centipawn loss, and understand exactly where the game turned.

📋 Export & Share Download your games as PGN files or copy the FEN of any position with a single click. Take your analysis anywhere.

Move Classification

JomChess evaluates every move using Stockfish and classifies it based on centipawn loss — the difference between the best possible move and the move you played.

Brilliant Best Great Good Book Inaccuracy Mistake Miss Blunder

Under the Hood

Engine Stockfish — open-source, world-class chess engine
Analysis Depth 10 ply per move for real-time feedback
Difficulty Range 20 levels — 400 to 3000 estimated Elo
Board Library chessboard.js with click-to-move interface
Move Validation chess.js — full rule enforcement including en passant, castling, promotion
Runs Entirely In your browser — no server, no latency, fully private

JomChess is made in Seremban, Malaysia. Whether you're a casual player looking to improve or a coach preparing lessons, JomChess gives you the tools to play, analyze, and learn — all for free, right in your browser.