4 6 7 5 8 7 8 3 6 3 1 9 9 8 7 3 5 8 1 4 4 5 9 6 2 3 16-09-2009.......hard 16-09-2009 www.daily-sudoku-puzzle.com

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

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