A free online chess board where you can arrange any position, drag pieces, paste a FEN, flip the view, play out moves for either side, and run Stockfish on the result. Everything happens in one place, with no signup.
Open the interactive board editor at /analyze?mode=setup and start arranging a position.
Get Started
Import your games from Chess.com, Lichess, or upload PGN files
What You Can Do on the Board
The board at /analyze is not a static diagram — it is a full position editor and analysis board in one. From the setup screen you can:
- Drag pieces onto any square — build a position from scratch, add or remove material, fix a single piece you remembered wrong.
- Paste a FEN — load an exact position from Chess.com, Lichess, a book, or a puzzle in one step. A deep link like /analyze?fen=... opens straight into that position.
- Set the side to move — choose White or Black before you analyze, so the engine evaluates the right player’s turn.
- Flip the board — view the position from Black’s side when you are studying a defense.
- Play out moves — push the pieces for either color and the board enforces legal moves, like a real board you can rewind.
The board is a position editor and an analysis board in one — arrange, then analyze.
How to Use the Online Chess Board
- Open the editor — go to /analyze?mode=setup. It opens in the setup editor by default, with the board ready to edit.
- Build the position — drag pieces onto the squares, or paste a FEN to load one instantly. Pick the side to move and flip the board if you want Black’s view.
- Start analysis — press Start analysis. Stockfish evaluates the position, shows the best move with the evaluation, and keeps re-evaluating as you play out moves.
From Board to Stockfish Analysis
The point of an editor board is what comes next. Once your position is set, Stockfish runs on the server — a strong engine at high depth, not a cut-down version doing the work in your browser. For the position on the board you get the engine’s best move and the evaluation, and when you play a move for either side the engine re-evaluates on the fly, so you can test a line and see immediately whether it holds.
Because a large position-evaluation cache backs the engine, common positions and well-known openings often return their evaluation instantly. You set up the position once and explore variations without waiting on every move.
If you already have the position written down as a FEN string and just want its evaluation, the FEN Analyzer walks through copying a FEN out of Chess.com or Lichess and loading it. If you want the full picture of how Stockfish reads any board — best move, accuracy, move labels, and the evaluation graph — see the Chess Analyzer.
When the Board Beats Importing a Game
Importing a whole game is the right move when you want to review what you actually played. The board editor is better when there is no game to import:
- You read a position in a book or article and want to feel it out.
- You are checking a single endgame or a tactic and only need a few pieces on the board.
- You want to set up a “what if” from a game — move one piece, then ask the engine what changes.
- You are coaching or explaining and want a clean board to drag pieces on.
In all of these, you start from the board, not from a username or a PGN file.
Related
- FEN Analyzer — load and analyze a position from a FEN string.
- Chess Analyzer — how Stockfish reads any position: best move, accuracy, move labels.
- Free Chess Analysis — analyze whole games from Chess.com, Lichess, or PGN, free and without limits.
- Open the board editor — set up a position and start analysis now.