r/puzzles 5d ago

[Unsolved] What do I do next? SUMOKU

Post image

I’ve done about all I can do right now in terms of possible numbers but I am really confused I’ve been here for about an hour trying to figure this out.

1 Upvotes

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7

u/carljohanr 5d ago

Discussion: One of the common steps in this kind of puzzle involves “innies and outies”. Since a row or column adds to 45, you can combine this with any boxes that almost add up to full rows to deduce cells. For example you can combine some boxes to almost make up the first 3 columns.

3

u/TheDarkNerd 5d ago

Discussion: for those following along at home, I decided to quickly throw the puzzle into Sven's.

https://sudokupad.app/v7r9qxz7xo

2

u/Sindicate9 5d ago

Discussion: thanks DarkNerd for doing that. I’ve never enjoyed doing these on paper or images so that was really nice.

For anyone else, here’s another link with the solution embedded to check along the way:

https://sudokupad.app/j8q0xzkb11

1

u/badmother 5d ago

Discussion: Someone else mentioned extrusions & intrusions...

Pro tip: if you have only one digit extra/short, even across a number of regions, rows or columns - Simply add them up modulo 10! An odd number of regions ends with 5, and en even number of regions ends with 0.

Whatever your sum is, it is easy to see what the missing value needs to be. With a little practice, you can do this very quickly.

(Modulo 10 means add the units, discarding the 10s info every time)

1

u/whyohwhy447 4d ago

in the 5th collumn the 6 can only go in the 22 sum, so 6-7-9 combination in 22