what’sthisposition
Drop a screenshot of a board, paste a FEN or set up the pieces. You get the evaluation and the reasons behind it: threats, weaknesses, strengths and plans for both sides, drawn on the board.
Enter a Chess.com or Lichess username, a game link or a PGN. Every move gets a label from Brilliant to Blunder and an explanation.
The evaluation, and the reasons behind it.
Screenshots of an online board read best. A photo of a real board taken at an angle may need a few squares fixed by hand.
Stockfish's top lines come with what the position is about: the threats right now, weaknesses such as holes and loose pawns, strengths such as a dominant piece or a passed pawn, and plans for both sides, with when to play them and what can go wrong. Each item is drawn on the board and marked as a board fact, an engine result or an idea.
Pick a candidate move to see why the engine likes it, or why another move doesn't work: the line is played out on the board and explained.
Any position of a reviewed game opens here in one click, and the review is kept for when you go back to it.
About analysing a single position.
Most chess sites show it on their analysis board, often under Share or below the board. Or skip the FEN and drop a screenshot instead.
No. A picture can't show whose turn it is, whether castling is still allowed or if en passant is possible, so you set those. Which side is at the bottom is guessed, with a one-click swap.
No. A small neural network reads the board on your device, and the picture never leaves your browser.
Yes. The address keeps the position (?fen=…), so the link opens the same analysis for anyone.