A bright new puzzle
Mastermind 13: Invention Engine is a hard English-language crossword with 13 clues. Inventors, engineers and breakthroughs that rewired everyday life.
12 × 12 grid. Free guest play, with no download.
Use Help for a clue nudge and Check word to check your selected answer. Finish the crossword to challenge a friend on the same puzzle.
Premium Puzzle Fund
12 / 300 Tokens
288 to Premium
Institutions, treaties and vocabulary of international affairs.
More mastermind
Big ideas, scholarly language and the architecture of knowledge.
More mastermind
Civilizations, dynasties and powers that shaped the ancient and medieval world.
More mastermind
5 more keys to your next treasure chest.
