411 REFERENCE · Wikibooks
Puzzles/Logic puzzles/Sudoku/9 by 9/Example 1 solution
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5 7 3 9 1 4 6 2 8 2 1 8 5 6 7 4 9 3 6 4 9 3 8 2 7 5 1 9 6 5 2 7 3 1 8 4 1 3 2 8 4 6 5 7 9 4 8 7 1 5 9 3 6 2 3 5 4 6 2 8 9 1 7 7 2 1 4 9 5 8 3 6 8 9 6 7 3 1 2 4 5