Your task is to solve the Sudoku and complete the missing words in the following poem.enter image description here

  • Classic Sudoku: Each row column and box contains the digits 1-9.
  • XV-rules: Digits separated by V must add to 5. Digits separated by X must add to 10. There is no negative constraint (e.g. a 3-7 domino can appear with or without an X-clue). In this puzzle only one V-clue is provided.
  • FUN FACT: the following URL describes a little-known trick for solving Classic Sudoku. https://www.youtube.com/watch? v = d Q w * w * W g * c Q


Forget about the Sudoku. Rand Al Thor's partial answer has already extracted all the useful information available.

  • $\begingroup$ Nice one. <-- link may contain spoilers $\endgroup$ Apr 4, 2021 at 12:42
  • 1
    $\begingroup$ @Randal'Thor You must be very familiar with the given URL, because it seems like you found the URL before you solved the puzzle :) $\endgroup$ Apr 4, 2021 at 13:24
  • $\begingroup$ @LukasRotter It's memorable to me because of its multiple doubleyous. Combined with last Thursday's date ... :-) $\endgroup$ Apr 4, 2021 at 13:25

1 Answer 1


Completed Sudoku:

enter image description here

This is confirmed by the FUN FACT, which refers to

a rickroll video with the characters 4,9,X removed. The green cells in the Sudoku grid are 4, 9, and two numbers which could have an X between.

Step-by-step solution:

enter image description here

  • $\begingroup$ You’re most of the way there. All you need is to complete the poem and the check mark is yours😊 $\endgroup$
    – happystar
    Apr 4, 2021 at 20:58
  • $\begingroup$ @happystar I'm pretty stuck on how the poem relates to anything else. (It contains 51 asterisks, FWIW - I assume those are all supposed to be words, but also somehow to connect with the numbers in the grid ...) $\endgroup$ Apr 4, 2021 at 21:05

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