6 3 4 2 6 7 3 5 5 7 6 8 2 9 5 6 4 7 9 2 1 6 3 9 7 5 1 8 15-04-2017.......hard 15-04-2017 www.daily-sudoku-puzzle.com

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

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