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

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