7 6 8 8 2 6 4 2 5 5 3 7 9 7 5 6 1 4 9 2 3 9 4 8 3 9 8 1 28-07-2018.......hard 28-07-2018 www.daily-sudoku-puzzle.com

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

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