8 3 1 7 6 9 1 8 8 2 3 5 9 3 5 6 2 9 5 4 3 6 4 2 1 7 24-08-2017.......hard 24-08-2017 www.daily-sudoku-puzzle.com

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

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