From the editor's desk
About Puzzle Lair
Puzzle Lair is an independent home for logic puzzles: Sudoku, Killer Sudoku, Calcudoku, X-Sudoku, Kakuro, Ripple Effect, Crossmath, Nonograms and Number Loop, all playable in your browser on desktop or mobile. Every puzzle is generated and verified to have exactly one solution reachable by pure logic, no guessing, ever.
No ads, no subscription
We think a puzzle site should feel like a quiet desk, not a billboard. Puzzle Lair shows no ads and sells no subscriptions. Playing is free, and a free account adds saved progress, stats, achievements and leaderboard entries. If you fall in love with a puzzle type, a single one-time purchase unlocks its full catalog forever, that's the whole business model. No ads, no subscription, and we never sell your data.
Who makes this
Puzzle Lair is built by Chesterton Technologies, a small independent studio. Questions, feedback or bug reports are genuinely welcome, email ChestertonTechnologies@gmail.com and a human will read it.