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To solve the puzzle you must make sure that every column, row and 3x3 box contains the numbers 1 through to 9.
Almost all of the puzzles can be solved using logic alone and there is no need to guess. A puzzle can take from 20 minutes to 2 hours to complete depending on its level and your experience.
People have developed a range of methods and tactics in order to solve the puzzles.
Sudoku Puzzles
9x9
6x6
Samurai
Killer
More Killer
Killer Samurai
More Killer Samurai
9x9 Solver
6x6 Solver
16x16 Solver
Solver Code
Anders Giversen 9x9 Solver
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