Sudoku

Generates easy puzzles on demand. Solves puzzles extremely quickly, even puzzles that cause other solvers to time out, by using a combination of iteration and recursion. Impossible to type an incorrect number.

New Hint Solve Import Restart Propagate ms

[Blank Board] [Custom Puzzle] Testing - Propagate Testing - Process Of Elimination Testing - Solution Count 1 Testing - Solution Count 2 Testing - 20 Solutions Testing - 500+ Solutions Beginner Intermediate - Last Number In Row, Col, & Box Intermediate - Naked Single Intermediate - Hidden Singles Intermediate - Naked Pairs/Triples Intermediate - Hidden Pairs/Triples Intermediate - Naked/Hidden Quads Intermediate - Pointing Pairs Intermediate - Box/Line Reduction Advanced - X-Wing Advanced - Simple Coloring Advanced - Y-Wing Advanced - Swordfish Advanced - XYZ Wing Insane Puzzle #1 - 25s (Hidden Singles) Insane Puzzle #2 - 2s Insane Puzzle #3 - 0.2s Insane Puzzle #4 - 7s (1 Hidden Single, Then Exocet) Insane Puzzle #5 - 2s Insane Puzzle #6 - 2s Insane Puzzle #7 - 1s Insane Puzzle #8 - 9s (Exocet) Insane Puzzle #9 - 0.3s Insane Puzzle #10 - 2s Insane Puzzle #11 - 2s Insane Puzzle #12 - 7s Insane Puzzle #13 - 33s (1 Hidden Single, then Bowman's Bingo) Insane Puzzle #14 - 4s Insane Puzzle #15 - 1s Insane Puzzle #16 - 7s (1 Hidden Single, then stuck) Insane Puzzle #17 - 0.2s Insane Puzzle #18 - 20s (Hidden Singles) Insane Puzzle #19 - 4s Insane Puzzle #20 - 0.6s Insane Puzzle #21 - 5s Riddle of Sho - 0.2s Escargot - 0.1s Shining Mirror - 0.9s Arto Inkala - 5s Only 17 Numbers - 8s

See the logical solving steps using the Sudoku Wiki Solver

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