4 1 2 5 5 6 7 9 5 3 4 5 2 6 7 8 9 1 4 6 7 1 6 5 2 8 9 6 11-10-2017.......hard 11-10-2017 www.daily-sudoku-puzzle.com

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

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