LogFAQs > #962352834

Serious Cat posted...

Phistomefel's ring didn't get me very far, but I came to the same conclusion with this equivalent set:

https://gamefaqs.gamespot.com/a/user_image/4/3/8/AAPWHiAAC4rW.jpg
The digit in the center square can only appear in columns 1, 2, 8 and 9 in rows 3, 4, 6 and 7 by either knight's move, diagonal, or plain sudoku rules. That requires the digit in the center square to be diagonally adjacent in those rows, thus eliminating the remaining possibilities left in the Phistomefel boxes. (Plus the additional row of red compared to blue means there's an extra complete set of digits 1-9 in the red squares in addition to the equivalent set.)

You may...be? right, I'm having trouble following your overall statement. But you might be making things overcomplicated for you. It seems like you saw the ring:
https://gamefaqs.gamespot.com/a/user_image/4/6/6/AACZqoAAC4ry.png

Meaning that purple sees all of blue, we can conclude it's not in Yellow, thus if we just color everywhere purple can be we are left with this:

https://gamefaqs.gamespot.com/a/user_image/4/6/7/AACZqoAAC4rz.png

So that above picture has everywhere purple can be labeled.

So after that, let's think about another color like orange, looking at what you just solved for purple as an example, where is everywhere orange can possibly be? (you can reference the 3x3 of grids to maybe more easily spot a pattern). To answer this question, don't worry about orange overlap with any other colors, just worry about orange. "Where is everywhere orange can be?".

You can do this for each color "Where is everywhere X color can be?" (When answering this you aren't worrying about the other colors, just that specific color)

Finally I will re-highlight this statement:

I will highlight this because it is part of the puzzle/ruleset
The Name of the puzzle is "Multi-color Madness!"

(Recommended: Click the gear icon and enable "Multi-color Mode")