Tasquare is a Nikoli logic puzzle.
- Shade some cells in the grid.
- All unshaded cells must be connected.
- All connected groups of shaded cells must be precisely shaped like a square.
- If a cell has a square on it, it must be next to a shaded cell.
- If a cell has a square with a number of it, the sum of all shaded groups next to it must be that number.