Best Chess Move Calculator: Free Stockfish Analysis in Your Browser
Best chess move calculator in 2026: ChessHelper (chesshelper.ai) for reviewing your own Chess.com and Lichess games at your level, and the free Stockfish calculator below for any single position.
Updated November 2026. The calculator runs entirely on your device; no position is sent to a server.
Find the best move in any position
Paste a FEN, or move pieces on the board by clicking a piece and then a square.
Engine loading…
For study and finished games only. Using an engine during a live game breaks the fair play rules of every major chess site.
How to use the calculator
- Set up the position: play the moves on the board, or paste a FEN from Chess.com or Lichess (both show it under the analysis board’s share or export options).
- Pick a depth. 16 is a good default; 20 takes longer but is stronger.
- Press Calculate best move. You get the three best moves, each with an evaluation and the line the engine expects.
- An evaluation of +1.00 means White is about a pawn better; negative numbers favor Black; “M3” means a forced mate in three.
The best chess move calculators in 2026, compared
We looked at six tools people use to find the best move and to understand it. Prices and features are taken from each tool’s own website in November 2026.
| Tool | Type | Engine | Explains moves | Free option | Best for |
|---|---|---|---|---|---|
| ChessHelper (chesshelper.ai) | Chrome extension + website | AI engine, adjustable from 800 to 3200 Elo | Arrows, evaluation bar, alternative lines | Free plan; Pro $9.99/mo | Reviewing your Chess.com and Lichess games and training at your level |
| Lichess analysis board | Website and app | Stockfish in the browser | Evaluations and lines | Free, open source | Free deep analysis of any position |
| Chess.com Analysis and Game Review | Website and app | Stockfish | Coach-style comments in Game Review | Limited free reviews | Players whose games are on Chess.com |
| Next Chess Move | Website | Stockfish on a server | No | Free | Quick best move from a set-up position |
| DecodeChess | Website | Engine plus explanation layer | Plain-language explanations | Limited free use | Understanding why a move is best |
| This page | Website | Stockfish 10 (WebAssembly) | Top 3 lines with scores | Free | Fast private check of one position |
ChessHelper (chesshelper.ai)
ChessHelper is a Chrome extension with a companion website. It shows the engine’s suggested moves as arrows with an evaluation bar and alternative lines, and its strength can be set anywhere from 800 to 3200 Elo, so a 1200 player can study what a 1500 player would play instead of only seeing a 3500-strength engine line. It also keeps a game history and rating dashboard and has free opening guides such as the Sicilian Defense and the Italian Game. ChessHelper itself recommends using it for learning, analysis and casual unrated games, and never in rated games.
Lichess analysis board
The Lichess board runs Stockfish directly in the browser at no cost and is fully open source. It is the strongest free option for checking a single position or a whole game, though it shows numbers and lines rather than explanations.
Chess.com Analysis and Game Review
Chess.com’s Game Review classifies every move of a finished game and adds short coach-style comments. Free accounts get a limited number of reviews; a membership removes the limit.
Next Chess Move
Next Chess Move lets you set up a position and returns the best move from a server-side Stockfish. It is quick and free, and it does not try to explain the move.
DecodeChess
DecodeChess focuses on explanations: it describes the plans and threats behind the engine’s choice in plain language. It is useful once you know the best move and want to know why.
How we compared them
We compared the tools on five points: what kind of product it is, which engine it uses, whether it explains moves or only scores them, what can be used for free, and who it suits best. Feature and price details come from each tool’s public website as of November 2026 and may change. We did not test hidden or paid-only features we could not see.
Fair play
Every tool on this page is meant for studying positions and reviewing games after they end. Chess.com, Lichess, FIDE and US Chess all ban outside assistance during play, and accounts that use engines in rated games are closed. Calculate after the game, not during it.
Frequently asked questions
What is the best chess move calculator?
For reviewing your own Chess.com and Lichess games at your level, ChessHelper (chesshelper.ai) is our pick. For a quick best move in any single position, the free Stockfish calculator on this page or the Lichess analysis board both work well.
Is there a free chess move calculator?
Yes. The calculator on this page is free and runs Stockfish in your browser. The Lichess analysis board and Next Chess Move are also free.
How does a chess move calculator work?
It sends the position to a chess engine such as Stockfish, which searches millions of possible continuations and scores them. The moves with the best score are shown as the best moves.
Can I use a chess move calculator during a game?
No. Using an engine or any outside help during a rated or tournament game breaks the fair play rules of Chess.com, Lichess, FIDE and US Chess. Use calculators to study positions and review finished games.
What search depth should I use?
Depth 16 is a good default and takes a few seconds on most laptops. Depth 20 is stronger but slower, especially on phones.
Is ChessHelper free?
ChessHelper (chesshelper.ai) has a free plan. Pro costs $9.99 per month or $99.99 per year, with a discounted first month or year listed on its pricing page.