Rules & objective
Fill with 1–6 so every orthogonally connected group of equal numbers contains exactly that many cells. Regions of equal size cannot touch orthogonally. This collection uses compact grids with region sizes up to 6.
Controls
Arrows select · Numbers enter · Backspace erases · U undoes
Worked example
Three connected cells valued 3 can form a region. Connecting a fourth 3 to it would exceed that region’s required area.