Clueless Sudoku 1 - Rules & Guide

Tip 1: Treat the color grid as a "cross-sea bridge"

Since these 9 boards are not physically in contact with each other (no overlapping areas), the color grid is the only way you can pass clues across the boards. When you solve the number of the central color grid in a certain local disk, you must immediately bring it into the logic of the "10th Sudoku" to see if you can eliminate the candidates for the center grid of other disks through global hidden rows or columns.

Tip 2: Always keep in mind the "hidden palace constraints within a single chart"

Many players forget to hide the core "grid" rule of Sudoku when solving problems: in any single 9x9 board, its 9 colored center grids exactly constitute a 3x3 grid of the 10th Sudoku. This means that in these 9 specific cells, 1 to 9 must appear exactly once each. If you hit a dead end when solving a certain board, you might as well count the missing numbers in its nine color grids. This can often bring you back to life.

Tip 3: Run two parallel lines and switch perspectives at any time

To do this question, you need to have an extremely flexible dual perspective. You have to constantly switch back and forth between "single board classic Sudoku mode" and "full field color grid Sudoku mode". When the clues on a single board are exhausted and you can no longer push, raise your perspective to see the color grids scattered throughout the field; when the global clues are interrupted, focus back on a specific local board and dig deeper.

Example picture: observe 9 completely non-overlapping disks, as well as specific color grids scattered throughout the field (the 10th Sudoku)

A: Does not have any special logical meaning. This is just to help you visually distinguish the boundaries of nine non-overlapping 9x9 disks to prevent misalignment of your vision. They appear alternately to form a checkerboard-like background pattern. You can completely ignore this large background color and only focus on the "small color grids" that really have linkage rules.

A: This is because in its original variant question, the initial known numbers given were extremely rare, and the players seemed clueless when they first got it, hence the name. But in the actual problem-solving process, by exploring the huge chain reaction brought about by the 10th hidden Sudoku, you will find that it is actually designed extremely exquisitely and is definitely not "boring" at all.