Puzzle library
Hand-picked classic and variant puzzles, free to play. Each puzzle is credited to its setter. Search by name or setter, pick a variant, and play in your browser.
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Thermometer sudoku · Arrow sudoku · Killer sudoku · Kropki sudoku · Whisper sudoku · Zipper sudoku · Renban sudoku · Palindrome sudoku · Between Lines sudoku · Entropic sudoku · Odd / Even sudoku · XV sudoku · Greater Than sudoku · Consecutive sudoku · Anti-Knight sudoku · Anti-King sudoku · Non-Consecutive sudoku · Diagonal sudoku · Windoku sudoku · Sandwich sudoku · Slow Thermometer sudoku · Double Arrow sudoku · Lockout Line sudoku · Region Sum Line sudoku · Min / Max sudoku · Quadruple sudoku · Extra Region sudoku · Clone sudoku · Little Killer sudoku · Disjoint Groups sudoku · Negative Constraint sudoku · Dutch Whisper sudoku · Modular Line sudoku · X-Sums sudoku · Skyscrapers sudoku · Average Arrow sudoku · Parity Line sudoku · Nabner Line sudoku · 10 Line sudoku · Anti-Factor Line sudoku · Equal-Sum Line sudoku