Shikaku
Expert00:00
ClassicClick a corner cell, then click another to draw a rectangle. Click a rectangle to remove it.
Expert Shikaku — what to expect
Expert Shikaku uses 12×12 grids (144 cells). Large numbers like 12, 16, and 20 appear with many possible factorizations, and the grid is dense enough that placements propagate constraints across multiple neighbors. Multi-step reasoning is the norm — "if this rectangle goes here, then that one must go there, which forces..."