2 8 9 3 9 5 8 6 1 9 4 7 8 2 7 5 6 1 3 8 3 5 2 4 1 7 1 2 21-06-2017.......hard 21-06-2017 www.daily-sudoku-puzzle.com

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

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