Endgame trainer
Will the pawn queen?
The most useful endgame skill there is: knowing at a glance whether a lone king can catch a runaway pawn. Drag the king around — every square it catches the pawn from lights up, and the verdict updates instantly.
Drag the black king. Dots show every square it catches the pawn from.
The king catches it
The defending king is inside the square — it stops the pawn.
Who moves next?
Positions
The rule of the square: draw a box with the pawn and its promotion square as one edge. If the defending king can step inside that box, it catches the pawn. Whoever moves next matters — the side to move effectively reaches one square further. (This is the pure king-vs-pawn race; the attacking king and blockades are a separate story.)
Want more? Drill checkmates in the endgame trainer or explore the other tools.