5 8 6 6 9 4 9 7 5 9 5 1 4 4 3 1 4 8 3 6 1 9 3 2 5 8 2 7 20-02-2018.......hard 20-02-2018 www.daily-sudoku-puzzle.com

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

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