6 9 7 3 1 8 5 8 4 2 6 9 5 7 3 8 8 9 1 7 8 3 4 5 2 9 6 1 31-08-2019.......hard 31-08-2019 www.daily-sudoku-puzzle.com

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

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