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Is there another name for this type of puzzle? I can only find two examples of it online:

In the game you start with a 6x6 grid filled with the numbers 1 to 9. One number on the grid is circled. The aim is to remove numbers (you can't remove the circled number) so that:

  • The sum in every row and column is 9 or less
  • Each number (1 to 9) appears only once

For example, you might start with this grid:

initial grid

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

And remove all of the number 5's except for the one that is circled:

grid after removing other 5s

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

You can then remove the numbers 7, 8 and 9 from column 3 because, when added to 5, the answer is greater than 9. And so on, until you end up with a grid that looks like:

final grid

- 2 - 1 - -
9 - - - - -
- 6 - - - 3
- - - - 4
- - - - 8 -
- - - 7 - -
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    $\begingroup$ FWIW, googling "九独" (kyudoku in Japanese) doesn't return any puzzles... $\endgroup$ – Andrew T. Sep 26 '19 at 7:22
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I believe not. We did just learn about it existing a few days ago. Plus, googling the word Kyudoku gives this link and this video, so I believe that Kyudoku is the only existing name.

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    $\begingroup$ However, not having any hits for this particular name doesn't mean the puzzle type doesn't have a different name. And maybe you just learned about it a few days ago, but it has been around for longer than that. $\endgroup$ – bobble Dec 26 '20 at 16:51

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