Wrong guesses prompt you for your thinking, plus an optional mini board to play out the variation. Export any time as PDF, print, or PGN with comments.
Analysis board
Explore variations and sub-variations freely, any time — it only shows the position up to your current guess, so nothing is spoiled. Saved lines are included in your downloaded report.
Every move you guess has a par value from 4 to 7. Harder moves are worth more. Your first guess on each move earns full par if it’s the game move or a move Stockfish rates just as good, 60% if it’s close, and 30% if it’s playable. Missing a critical only-move with a blunder costs a point. Your total is scaled so the best possible score is 100.
Par is the score a typical club player (around 1800) would be expected to get on this game, playing the side you chose from the move you started on. It comes from Stockfish’s analysis of every position: games full of non-obvious moves have a lower par, and games where many moves are about equally good have a higher one. It’s an estimate from a model, not an average of real players’ scores.
The strength bands are rough estimates, not an official rating.
Not quite — jot down why you thought that was the move. This gets saved with your notes for later review.
♟ Optional: play out a variation
Click a piece, then a square, to build out the line you had in mind. It's saved alongside your note and included in the export.
No variation moves yet — click a piece on the mini board to begin.
Analysis board
Play out your own ideas from this position. Go back and try a different move to branch off a variation — do it again from inside that variation to nest a sub-variation.