Puzzles & Logic

Puzzles are reasoning with the stakes removed, which is why they survive in every culture that has had spare time. This category covers the classic games and their structures, chess, sudoku, crosswords, tangrams, along with the vocabulary of formal reasoning that sits underneath them. It is less about being quick than about recognising the shape of a problem, which is a skill that transfers well beyond puzzles. The explanations describe why a rule or a method works rather than simply stating it, and none of the questions depend on solving anything against a clock.