Suguru: Region Number Puzzle

Fill each region with its own numbers — without ever letting equals touch. Suguru (also known as Tectonic) is a Japanese logic puzzle in the Sudoku family, but with a twist: the grid is divided into irregular regions of 1 to 5 cells, and each region must contain 1, 2, 3… up to its size. The extra rule that changes everything: identical numbers may never touch — not even diagonally. Every board has exactly ONE solution. A region of three cells needs a 1, a 2 and a 3; a number already placed forbids its equals in all eight surrounding cells. That is all the logic you need — the rest is pure deduction. FEATURES • 150 hand-verified levels from gentle 5×5 to demanding 10×10 • Rule-named hints: the game tells you which rule unlocks the next cell • Completed regions light up; pencil marks clear automatically • Free daily puzzle every day, with a streak to protect • Undo, notes mode, live…