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!
                                             
     27263152515677     
     24                         76     
     23                         75     
     20                         72     
     19                         71     
     16                         68     
     15141338416267     
                                             
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47     49     55     65     67
     45     53     63     61     
43                                   69
     37                         81     
41                                   71
     39                         79     
7                                   73
     11     21     19     77     
9     13     15     17     75
                                             
     27263944476871     
     28                         72     
     29                         73     
     30                         74     
     11                         75     
     8                         60     
     561518536261     
                                             
23     27     49     79     81
     25     29     51     77     
21                                   75
     19                         55     
13                                   73
     11                         71     
1                                   69
     7     35     39     67     
3     5     37     63     65
                                             
     49484746578075     
     20                         76     
     17                         77     
     14                         62     
     1                         63     
     10                         66     
     942738373635     
                                             
73     75     57     53     49
     71     59     55     51     
69                                   47
     81                         35     
67                                   45
     65                         37     
13                                   43
     11     19     25     39     
15     17     21     23     41
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