5 9 3 5 7 3 1 2 8 6 8 1 7 6 9 2 4 7 8 3 5 8 3 4 6 8 5 2 19-12-2017.......hard 19-12-2017 www.daily-sudoku-puzzle.com

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

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