4 8 7 9 1 6 8 3 1 2 5 7 5 6 2 7 4 2 3 5 6 1 9 6 8 5 9 3 25-12-2016.......schwer 25-12-2016 www.daily-sudoku-puzzle.com

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