Miraringutairu ("Mirroring Tile") is a logic puzzle published by Nikoli. A rectangular or square grid contains black cells; some of them contain numbers. The goal is to locate blocks of black cells in the grid. Each numbered cell indicates the total number of black cells in the block (a block may contain few numbered cells). The grid may contain blocks without numbers. No two blocks may share an edge, but each block must be connected with at least one another block of the same size and shape through their corners (blocks may be rotated or mirrored).
Cross+A can solve puzzles from 3 x 3 to 30 x 30.