7 3 6 2 4 7 5 1 3 2 6 4 9 8 9 1 8 7 6 5 7 9 7 1 4 2 5 3 1 28-01-2021.......hard 28-01-2021 www.daily-sudoku-puzzle.com

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

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