Analysis board, editor, calculators, and more — free forever on Aether.
Load any PGN or FEN, step moves, toggle engine lines.
Set up any position, copy FEN, jump to analysis.
Any legal move, auto opening name, Stockfish 18 reply, undo/redo.
Syzygy WDL / DTZ lookup on theoretical positions.
Photo-to-board, Chess.com, Lichess, or PGN into Game Review.
Paste a FEN, preview, jump to review.
Screenshot or diagram to FEN (on-device).
Estimate rating change after a win, draw, or loss.
Drill repertoire lines move-by-move.
Accuracy, Sigma→Clown grades, eval graph, critical timeline.
