5 9 2 2 4 6 8 6 2 4 4 8 7 1 7 4 1 3 2 5 6 9 9 1 3 6 4 8 1 3 6 7 21-09-2020.......hard 21-09-2020 www.daily-sudoku-puzzle.com

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

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