8 7 4 6 9 6 3 9 5 4 7 8 9 8 6 7 6 5 3 2 2 1 4 5 6 2 1 5 18-01-2019.......hard 18-01-2019 www.daily-sudoku-puzzle.com

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

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