4 7 5 9 5 6 8 7 1 4 9 1 7 2 1 3 8 6 5 5 3 6 4 5 8 1 2 4 09-01-2020.......hard 09-01-2020 www.daily-sudoku-puzzle.com

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

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