Chess Move Calculator & Analysis Features
Contextual AI Chess Coach
Ask why any candidate move works, identify hidden threats, and understand the strategic plan in plain English.
Candidate Lines & Variations
Compare the top 1–3 engine continuations with live evaluation scores and test moves directly on the board.
Flexible Position Setup & Editor
Set up custom positions with spare piece trays, paste FEN strings, or load positions from PGN clips and username games.
Understand Your Chess Position — Not Just the Engine Score
A chess move calculator shows you numerical engine evaluations, but numbers alone do not explain the ideas behind the board. Our analysis workbench combines fast calculation with an integrated AI Chess Coach.
Explore candidate variations, test defensive responses, and get plain-English explanations for why a move works, what threats exist, and how to improve your piece placement.
Analyze a Position Your Way
- Analyze Any Position: Paste a FEN or play moves on the board; the engine evaluates instantly while AI explains the ideas clearly.
- For Coaches & Students: Demonstrate winning plans with professional engine evaluation and clear tactical explanations.
- For Club Players: Explore complex middlegames, compare candidate moves, and understand why certain variations work.
How to Use the Chess Move Calculator
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1
Set Up Your Position
Place pieces using the board editor, paste a FEN string, or load a position from PGN.
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2
Review Engine Calculations
The engine instantly evaluates the board, displaying live evaluation scores, candidate lines, and visual board arrows.
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3
Ask the AI Coach Why
Read plain-English tactical and positional explanations to understand the threats, plans, and reasoning behind the moves.
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4
Explore Alternative Lines
Play moves on the board to see how engine evaluations change dynamically across different defensive responses.
Need just one direct answer? Try our Best Chess Move Finder →? Calculate the single strongest engine move and key tactical continuation without configuring analysis settings.
Explore Dedicated Chess Tools
Frequently Asked Questions
Set up your board or paste a FEN string above: Stockfish 18 NNUE immediately evaluates the position and displays the strongest continuation with a visual arrow.
Load your position into our free calculator: it calculates candidate lines and shows you the top continuation without requiring registration.
Yes. The integrated AI Chess Coach explains candidate moves in plain English: the threats, plans, and positional ideas behind the engine scores.
Yes. All position analysis features, engine calculations, candidate lines, board editing tools, and AI explanations are 100% free with no registration required.
This analyzer runs Stockfish 18 NNUE directly in your browser, providing low-latency evaluation, candidate lines, and customizable depth.
The engine runs locally inside your browser via WebAssembly (WASM), ensuring instant calculations and complete privacy without sending board states to a third-party server.