5 2 9 1 6 8 9 2 7 6 3 5 8 2 1 3 1 7 4 3 8 7 9 2 6 4 8 1 22-02-2017.......hard 22-02-2017 www.daily-sudoku-puzzle.com

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

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