Suguru
- Category
- Brain
- Players
- 1
- Controls
- Tap
- Grid
- 5 x 5
- Loads
- No install
Controls
| Tap a cell | Select it. |
| Tap a number | Place it. |
| Tap ✕ | Clear the cell. |
Next up
| Tap a cell | Select it. |
| Tap a number | Place it. |
| Tap ✕ | Clear the cell. |
Suguru, sometimes sold as Tectonic, divides the grid into irregular blocks. A block of four cells holds the numbers one to four, a block of five holds one to five, and so on. The second rule is the sharp one: no two touching cells may hold the same number, and touching includes diagonals.
That diagonal restriction is far more powerful than it first appears. A five placed anywhere rules it out of up to eight surrounding cells, so a single placement can cascade through two or three blocks at once.
Start with the smallest blocks. A block of three can only hold one, two and three, so its options are far more limited than a block of five.
Use the diagonal rule aggressively. Beginners check rows and columns out of sudoku habit, but here the eight surrounding cells matter and the diagonals do most of the work.
Look at where a number can go within a block, not what goes in a cell. Asking where the four fits in a given block is usually more productive than asking what fits in a particular square.
Watch the block boundaries. Two blocks touching along an edge constrain each other heavily, because cells on either side of that edge are diagonal neighbours.
One up to the size of the block. A four-cell block holds one to four.
Never, and that includes diagonal contact.
Not directly. Only blocks and the no-touching rule constrain the grid.
Loosely. The blocks are irregular and the constraint is contact rather than lines.
Completely free, with no trial and no unlock. Suguru loads with the page and plays immediately, without an install step or a video ad first.