1 2 9 1 8 2 5 9 4 5 8 1 9 2 9 6 7 6 2 1 4 7 9 6 2 3 3 4 7 18-06-2017.......dificil 18-06-2017 www.daily-sudoku-puzzle.com

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2=>(9,1) | 3=>(4,1) | 2=>(3,4) | 1=>(3,8) | 2=>(4,7) | 6=>(4,2) | 4=>(6,8) | 7=>(8,3) | 4=>(8,4) | 2=>(7,8) | 1=>(5,1) | 4=>(2,2) | 4=>(4,5) | 7=>(4,9) | 9=>(9,4) | 4=>(5,3) | 3=>(7,7) | 1=>(7,3) | 1=>(8,9) | 9=>(8,2) | 4=>(1,6) | 3=>(3,2) | 3=>(2,8) | 7=>(5,6) | 1=>(9,5) | 6=>(9,9) | 6=>(1,5) | 3=>(1,4) | 7=>(1,1) | 5=>(2,6) | 7=>(3,5) | 3=>(6,5) | 5=>(7,5) | 6=>(7,6) | 9=>(2,1) | 8=>(6,1) | 8=>(3,3) | 7=>(2,7) | 5=>(9,2) | 8=>(7,2) | 5=>(5,4) | 3=>(5,9) | 5=>(6,9) | 8=>(9,6) | 5=>(1,8) | 8=>(1,9) | 6=>(2,3) | 6=>(3,7) | 9=>(6,3) | 8=>(5,7) | 5=>(8,7) | 8=>(8,8) |