Arukone No 2×2
Number Link with full coverage and no 2×2 block filled by one path.
Controls
Connect every pair of equal numbers with one continuous orthogonal path. All cells must be used, paths never cross or branch, and no 2×2 block may belong entirely to one path. Tap near a cell edge to add or remove a line; drag between adjacent cells to connect them.
Brain training · PuzGo