8 6 4 7 3 1 1 9 7 5 4 6 2 7 3 5 1 6 4 2 8 1 5 4 3 9 6 5 18-05-2018.......hard 18-05-2018 www.daily-sudoku-puzzle.com

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

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