A sudoku with NO given digits - but clues outside the grid?!

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#Sudoku
#crypticcracking

[itsyaboi]

im really loving these variant sudokus, lots of fun to watch you guys go through all the logic steps to get to the solution :)

[plbster]

I thought this was gonna be an April fool's joke. You never cease to amaze me.

[shbbymosh]

No idea how I found this. Easily becoming one of my favorite channels. Great work.

[arcynical]

I am really interested how sudoku are made, with difficulty level in mind. It seems that for the really elegant puzzles the author has a very clear idea what steps the solver has to take. Will there ever be a video about that?

[Taterzz]

19:13 dude just typed the terminator theme.

[rioschala]

I really love the way you explain all the process

[Alphoric]

Honestly one of the most entertaining channels

[pidr]

I really love these videos! I love hearing the thought process of people who are better than me at these sorts of puzzles, it really helps me learn how to think about them better.

[MrRyanroberson]

489 = 20, and 368 = 17 at 16:58, the middles are made distinct by checking the two possible cases, and which case is correct can also be determined. 179 = 18, so the 14 box has to be a 1 and the rest fall in line.

[Qazqi]

15:45 Tough one to spot, but if you try 7 rather than 5, the only way to make the remaining 8 is 2 and 6, giving you a 267 going down that leaves the sixth row box empty. Therefore, it must be a 5.

[fingerling]

This is the first puzzle I've done before watching the video due to how unique they are. I had to have a spreadsheet open with all possible combinations for getting the outside totals and work through them all. Not quite developed the same intuition for these as typical sudoku

[DarthPlaguais]

tried it myself, before watching the video... I've never done this kind of sudoku before, so this took me almost 90 minutes, but I solved it

[warrenyazzie]

Give the state of the puzzle at 14:51, the sum of the columns in each box equal (15 14 16), (14 15 16), and (16 15 14) respectively. Because of the limited set of possible combinations, I would conjecture that this should require each respective column of 14, 15, and 16 to have a similar combination of numbers. Ergo, you only need to find the union of the existing possible combinations.

The 15-column of the top-middle box have the possible combinations of (258 276 456) and the 15-column of the center box has the possible combinations of (186 357 456 492). The union of the two is (4 5 6). Assuming my conjecture is true, that would mean the 15-column of the bottom-middle box should also be a combination of (4 5 6). The only possible combination given what is shown would mean the column is equal to (5 4 6).

A similar approach should work for the other columns. I'm curious if this would hold true as a solution path for other Frame Sudoku puzzles with similar initial conditions.

[Jane-vymf]

waiting for the obligatory "ThErE aRe 36 GiVeNs" comment

[Tehom]

11:15 It might be helpful to look at that as odds and evens. {7, 9} is always odd, {4, 6} is always even, so to get 21 you need another even number, so 5 is out.

[doncook]

Could you take any finished sudoku and make it a framed sudoku? Just wondering if it would be logical to finish and only one solution

[tchoate]

Where can I find these types of puzzles? When I search variants, I don't find these.

[angelowentzler]

This is just a killer sudoku in disguise

[thomasjones]

13:53 He goes through an elimination process where the 2nd option he misses the 1 in the bottom left square isn't possible due to 1 in the top left.

[kevinkattai]

Hey,
I really love these types of variation sudokus. Do you have any great suggestions where to find more of those / are there any sudoku books in regards of those (the ones which can be solved) / do you know any apps which do variant sudokus.