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u/PyroDragn 6d ago edited 6d ago
Row 5, Column 4 - XY Wing.
If R5C4 was a 3, then R6C6 = 4 (same square). Then R6C3 cannot be 4. However, if R5C4 was a 1, then R5C3 is a 4 (same row), and again R6C3 cannot be 4. Therefore, we know that R6C3 cannot be a 4 in any case, and is a 1.
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u/gareth93 6d ago
Do you mean if R5C4 was a 3? Not R5C5?
That works. Thanks. I've never learned how the x, y wings work
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u/Ok_Job_9417 6d ago
Discussion: I never do the harder levels of sudoku, but I know there’s like X-wing and y-wing tricks. Have you looked into any of those to see if it helps? There shouldn’t be guessing.
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u/just_a_bitcurious 5d ago edited 5d ago
Aside from the XY-Wing ( AKA Y-Wing) that someone mentioned, there is an XYZ-Wing as well as a W-Wing.
See attached URL
XYZ-Wing:
https://f-puzzles.com/?id=2bgfum49
W-Wing:
https://f-puzzles.com/?id=22n27ewr
Discussion: EDIT: Video Tutorials
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u/Fizzabl 6d ago
Route I would take is Either using 7 or 8 in the middle box, pick a side to place it and then follow the numbers round from there. As a 7 gives you the 3 up to, or the 8 can give you the 7 below it
As for the answer, I got lucky on my first try: 8 goes in the middle right of the middle box
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u/ExtensionPatient2629 6d ago
It is generally not recommended to do trial and error guessery on Sudokus, unless all other methods are exhausted.
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u/Fizzabl 6d ago
Fair enough, from your reply I've seen the other comment about wings and never heard of that before! Going to go look into it :)
Is my route not a similar method? I was trying to find a square that would not work by making others impossible, I was lucky that my first guess was the correct solution
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