4 7 1 8 4 2 7 4 6 8 1 5 6 3 8 3 4 9 9 2 5 6 8 7 5 3 12-01-2020.......hard 12-01-2020 www.daily-sudoku-puzzle.com

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

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