one square in any direction, from three in the corner to eight in the middle, and castling
Built as a memo rather than a table: the thing worth hanging it up for reads across the room, with the full reference in smaller type below it.
Three sizes in one archive — from a sheet on the fridge to a poster on the wall.
The moves are FIDE Laws of Chess in force from 1 January 2023, article 3. Square counts are walked, not quoted.
The king moves to one adjoining square, which is the shortest move in the game. In a corner there are three such squares, on an edge five, in the middle of the board eight: nearly a threefold difference, and that is why the king is walked towards the centre in the endgame and hidden in a corner at the start.
There is one exception, and it is also the only move in chess in which two pieces move at once. Castling is described as a king move rather than a rook move: the king is transferred two squares towards the rook, and the rook is then transferred to the square the king has just crossed. That is why in a score sheet castling occupies the king's move and not two moves.
The conditions for castling are not about the squares but about the history of the game: neither the king nor that particular rook may have moved before. The right is lost for good after the king's first move — even if it comes straight back to where it started.
Why the numbers can be trusted. Every countable number here is computed from data rather than typed in, and the sheet must pass 7 independent checks before it is allowed to build — how many items there are, the order they come in, and the claim in the highlighted box itself. If one fails, there is no file.
four FIBA sizes with their circumference and mass — and why the rules set a bounce, not a pressure
Law 2, three codes of the game, five sizes and three FIFA quality marks — what a ball must survive
eleven sports at true relative size — circumference, mass, pressure, and who sets them
a diagonal at any distance — and the half of the board that will never come