Chess tools

Chesspedition's chess tools are free and need no account: an analysis board with Stockfish 19, a board editor that writes the FEN for you, and rating calculators for FIDE, US Chess and the ECF built from each federation's own published rules, plus a performance rating calculator and a plain Elo calculator. No ads.

• Analysis board

  Move the pieces, keep side lines and see Stockfish 19 evaluate any position in your browser.

• Board editor

  Set up any position, choose the side to move and castling rights, and copy the FEN.

• Next move finder

  Set up any chess position or paste a FEN and Stockfish 19 finds the best move in your browser, with the line it expects and who stands better.

• Board setup

  Set up a chess board in seven steps: which way the board goes, where every piece stands, and who moves first.

• Piece gallery

  The six chess pieces: what each is called, its letter in notation, its usual value and how it moves, shown on a board you can click.

• PGN viewer

  Paste a PGN or open a .pgn file and step through the game on a board. Files with many games are listed to choose from. Nothing is uploaded.

• Chess clock

  A two-player chess clock for your phone, tablet or laptop: tap your half when you have moved. Presets from bullet to classical, with increment.

• Round-robin generator

  Type the players and get the pairings for every round of an all-play-all, from FIDE's Berger tables. Byes for odd numbers, double round robins, a fair draw of lots.

• Tournament time planner

  Plan a chess tournament day: the longest a round can last at your time control, each round's start time, and whether the plan fits FIDE's limits for rated games and title norms.

• Is Chess.com down?

  A live check of Chess.com from your own browser: whether its public data service answers, how fast, and the time of the check.

• FIDE rating calculator

  Work out your FIDE rating change from your results, with the official expected-score table, the 400-point rule and the right K for you.

• US Chess rating calculator

  Estimate your new US Chess rating after an event: the sliding K, the effective number of games and the bonus for a strong result.

• ECF rating calculator

  Work out your English Chess Federation rating change for the month from your results, with the ECF difference table and the junior K.

• Performance rating calculator

  Work out your tournament performance rating: your opponents' average rating plus FIDE's figure for the percentage you scored.

• Title norm calculator

  Enter your games from one tournament and see whether they make a GM, IM, WGM or WIM norm under the FIDE Title Regulations, condition by condition.

• Elo calculator

  The plain Elo formula: your expected score against any opponent and how your rating changes for any K.