About Suguru
Suguru (also called Tectonic) divides the grid into irregularly shaped regions of varying sizes. Each region must be filled with the digits 1 through its own cell count — so a 4-cell region uses 1-2-3-4 — and the same digit can never touch another copy of itself, even diagonally, whether or not they're in the same region. No rows or columns rule at all — just regions and adjacency.
The Rules
Fill each irregular region with consecutive digits starting at 1, so no repeated digit touches another — even diagonally.
Step by Step
- The grid is divided into irregularly shaped regions of different sizes.
- Each region must contain the digits 1 through N, where N is that region's cell count, with no repeats inside the region.
- No two cells with the same digit can touch, even diagonally — regardless of which region they're in.
- There is no row or column rule — only the region and adjacency constraints matter.
- The puzzle is solved when every region is filled correctly and no matching digits touch.
Tips & Strategy
- Start with the largest regions — they use the most digits and are usually the most constrained by their shape.
- Once a digit is placed, every touching cell (including diagonally) can immediately rule that digit out, even across region borders.
- A region squeezed between cells that already rule out most digits often has only one valid arrangement left — look for these first.
- Work outward from where several small regions meet — the adjacency rule is tightest in those clusters.
Frequently Asked Questions
Do all regions have the same size?
No — regions vary in size across the grid, and each one only uses digits up to its own cell count.
Is there a row or column rule like Sudoku?
No — Suguru has no row/column uniqueness rule at all. The only rules are per-region digit ranges and the no-touching-duplicates rule.
Can the same digit appear twice on the board?
Yes, as long as the two copies don't touch each other, even diagonally, and aren't in the same region.
