Board utilities
Tools
Free utilities that need no account and touch no training data. Stockfish runs in your browser; nothing you paste here leaves it.
What should have happened here
Analysis board
Any position, the engine’s best ideas, and the board to try your own. Every trainer room’s “explore this” lands here; you can also start from scratch.
Set up any position
Board editor
Drag pieces freely, set the side to move, or paste a FEN — then hand the position straight to the engine.
Best continuation from any position
Start from a FEN
Paste a FEN from any site or book and the analysis board opens on it, engine running.