Free printable Numpath puzzle game (compare to Numbrix)

Printable, reloadable, free, and always new, Numpath puzzle brain-teaser games are here. Print out this page, and play at your convenience. Simply fill in the empty squares with numbers, ending up with a "path" from number one to number eighty-one. Each number must adjoin the number before and after it, horizontally or vertically (not diagonally). Enjoy!
                                             
     39404352557877     
     34                         74     
     31                         67     
     26                         68     
     27                         69     
     22                         62     
     21201916151413     
                                             
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3     25     63     67     81
     1     27     65     69     
5                                   79
     21                         73     
7                                   77
     17                         75     
9                                   45
     13     33     39     47     
11     35     37     41     43
                                             
     19222556556081     
     20                         76     
     3                         75     
     4                         64     
     5                         65     
     6                         66     
     7323540394467     
                                             
31     33     69     73     81
     19     35     71     75     
29                                   79
     21                         77     
27                                   55
     23                         57     
25                                   53
     9     11     45     49     
7     5     3     47     51
                                             
     19183568717275     
     20                         76     
     21                         77     
     22                         56     
     23                         57     
     24                         58     
     910112454849     
                                             
27     31     53     59     81
     29     33     55     61     
25                                   79
     21                         63     
19                                   77
     11                         65     
17                                   75
     13     3     43     73     
15     5     41     69     71
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