THINK BEYOND THE BOARD
Follow a line. See what could have been.Fly through chess, one possibility at a time.
Import a FEN position or the main line of a PGN game. This replaces your current flight path. FEN cannot recover earlier repetition history.
Each floating board is a real chess position. The bright board is where you are; the smaller boards ahead show alternative moves.
Drag the scene to orbit, scroll or pinch to zoom, and use Overview to see the nearby tree. Arrow keys choose, fly and go back when you’re outside a text field.
Forward flight draws five nearby branches and a few look-ahead boards. Invert / all moves reverses the camera and spreads every legal next move in a fitted grid. Expand fills the browser window; Escape exits. Press I to toggle inversion. All legal moves remain available in the list. Up to 256 positions are cached in memory and on this browser; studies are limited to 256 half-moves. Stockfish ranks the current legal moves locally in your browser. Rank 1 is best for the player to move; scores are from White’s perspective. Analysis is a short estimate, limited to two seconds or depth 10, and never plays a move for you. No account or uploads. Stockfish source and GPL license.