# Puzzle of the day

The aim is to draw a single contiguous line from the upper left corner to the lower right corner. The line includes each number from 1 to 39 exactly once.

CSV:

 1,25,23,12,31, 3,20, 2,15,13,19,23
36,22,28,27,32, 4,19,21,20,11,29,12
34,13, 7,23,19, 8, 2,11,36, 8, 2, 3
7,24,38,29,23,19,27,17,37,14,11, 7
2,23,21,30, 6,20,38, 6,28, 9,33, 8
28,13, 9,11,36,18,16,15,11,18,34,14
1,36,11, 2, 9,14,19,35,38,25,20, 7
20,21,33, 8,15,23,20,29,30, 5,32,18
10,34, 7,26,13,34,21,35, 9,13,16,17
15,37,23,22,24,18,24,37,29,24,26,10
31, 3,34, 8,27, 7,37,15,20,21,23,35
7,29,17,14,26,23,24,18,36,20,19,39
• Starting from top left, can I go directly to 22, or must I go through one of 25 or 36? – Weather Vane Apr 22 '20 at 17:32
• 25 or 36 only... – perayu Apr 22 '20 at 17:34
• @Deusovi I have added CSV format. – Daniel Mathias Apr 22 '20 at 19:37
• Are you sure [logical-deduction] is accurate? I've been at this for about half an hour and haven't found any logical path anywhere at all -- only case-bashing. – Deusovi Apr 22 '20 at 22:34
• I agree with @Deusovi, this requires a lot of guesswork. Highlighting the numbers that that occur less than four times will reveal likely portions of the path, even a few cells with certainty, but I don't see any logical solution for the complete path. – Daniel Mathias Apr 23 '20 at 3:54