THE EIGHT BLOOD TYPES
three antigens, eight types — and the one rule the whole table of compatibility follows from
COLOUR GAMUTS
sRGB, Display P3, Rec. 2020 and ProPhoto RGB on the CIE 1931 chromaticity diagram
TORQUE
why the same dumbbell grows heavier as the arm rises, and how to work it out in advance
PHONETIC ALPHABET
the ICAO standard · for radio and telephone
FOOTBALL: THE BALL
Law 2, three codes of the game, five sizes and three FIFA quality marks — what a ball must survive
BISHOP
a diagonal at any distance — and the half of the board that will never come
KING
one square in any direction, from three in the corner to eight in the middle, and castling
THE MOVES OF THE PIECES
all six moves from one square, the article of the rules and how many squares each piece holds
QUEEN
file, rank and diagonal together — from twenty-one squares to twenty-seven
ROOK
fourteen squares from any square of the board — the one piece that does not care where it stands