Number & arithmetic
Suguru — rules and where to play
SUGURU · Tectonic / Nanba Block / Number Blocks
Fill each irregular region with 1 up to n, and no two touching cells — diagonals included — may match. Tiny regions, a short rule, and surprisingly hard to put down.
- Origin
- 2007 · Japan
- Difficulty
- ★★★★★ 2–4 / 5
- Time
- 5–30 min
- Grid
- 5×5 – 20×20
- Sites
- 3
Rules
- Each bold region is filled with 1 through n, where n is its cell count.
- No two adjacent cells may hold the same digit, diagonals included.
- Given digits cannot change.
How to start
A one-cell region is always 1
Spot one and fill it immediately.
Diagonals count — that is the whole game
This one word makes Suguru far denser than its cousins.
Radiate outward from given digits
A placed digit heavily constrains all eight neighbours.
Where players get stuck
- Checking only up, down, left and right and missing the diagonals.
- Treating region size as fixed when it varies from region to region.
Play Suguru
3 sitesAlso on multi-type portals
Related puzzles
About this page
- Last updated 2026-09-22
- Source Curated compilation of established puzzle rules and listed third-party play sites
- Audience Players learning Suguru rules or looking for online sites to play
- Covers Rules summary, how to start, common pitfalls, and the dedicated play sites listed on this page
- Does not cover Hosted puzzles, worked solutions, official contest rankings, third-party uptime or pricing guarantees
- Not advice This page is puzzle reference content only. It does not constitute financial, legal, medical or other professional advice.
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