9 1 2 6 5 5 4 7 2 1 7 4 3 1 8 6 7 9 3 3 8 5 1 2 2 5 7 4 8 02-02-2017.......hard 02-02-2017 www.daily-sudoku-puzzle.com

2 6 9 4 5 1 7 8 3 7 1 3 9 2 8 6 5 4 8 5 4 6 3 7 2 9 1 6 9 7 3 4 2 5 1 8 5 3 2 1 8 6 4 7 9 4 8 1 7 9 5 3 6 2 3 4 8 5 6 9 1 2 7 1 2 5 8 7 3 9 4 6 9 7 6 2 1 4 8 3 5

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