7 5 1 8 4 5 9 3 6 7 7 4 6 6 1 4 2 3 3 5 8 9 2 3 8 7 3 9 17-12-2020.......hard 17-12-2020 www.daily-sudoku-puzzle.com

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

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