5 9 8 3 1 8 9 4 7 5 7 8 1 7 5 1 6 2 5 9 4 5 2 6 3 6 7 2 19-01-2018.......hard 19-01-2018 www.daily-sudoku-puzzle.com

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

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