Sudoku as a SAT Problem

  title={Sudoku as a SAT Problem},
  author={In{\^e}s Lynce and Jo{\"e}l Ouaknine},
Sudoku is a very simple and well-known puzzle that has achieved international popularity in the recent past. This paper addresses the problem of encoding Sudoku puzzles into conjunctive normal form (CNF), and subsequently solving them using polynomial-time propositional satisfiability (SAT) inference techniques. We introduce two straightforward SAT encodings for Sudoku: the minimal encoding and the extended encoding. The minimal encoding suffices to characterize Sudoku puzzles, whereas the… CONTINUE READING
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