Depth
How far the engine has searched. Compare positions at a similar depth.
Free chess analysis board with local Stockfish
Play moves on a legal board, load FEN or the main line of a PGN, then choose the search depth and number of candidate lines.
Current FEN
Depth, evaluation and MultiPV
Evaluation
The score in pawns: plus favours White, minus favours Black. Mate scores show as M and the number of moves.
Candidate lines
MultiPV exposes alternatives, useful when one move is best but another is more practical.
FAQ on Chess Analysis Board
Inputs, evaluation perspective and local engine limits.
Is this chess analysis board free?
Yes. The board and local Stockfish analysis are free and need no account.
Can I paste a FEN into the analysis board?
Yes. Choose FEN, paste all six fields and load the position. The tool validates the board before analysis.
Can I paste a PGN game?
Yes. The main line is replayed and the final position is placed on the board. Variations are ignored so the tool stays focused on one line.
What does MultiPV mean?
MultiPV asks Stockfish to show more than one candidate line. One line is fastest; three lines are better for comparing alternatives.
Whose point of view is the evaluation from?
The score is shown from White's perspective: plus favours White and minus favours Black, regardless of whose turn it is.
Does a higher depth always give a better answer?
More depth usually improves tactical reliability, but it also takes longer. Start at depth 14 for a quick browser check, then raise it when the position needs more work.
Does my position get uploaded?
No. FEN parsing, PGN parsing and Stockfish all run in your browser.
Can I use the board on mobile?
Yes. The board uses the full available width and the engine inspector follows below it.
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