Mirror Regions
Draw walls to divide the grid into regions — each containing one dot and 180°-symmetric about it.
Interactive lesson1 / 4
Rule 01
Draw walls to partition the grid.
Tap the boundary between two cells to place or remove a wall. Walls separate cells into distinct regions.
All rules
Rule 01Draw walls to partition the grid.
Tap the boundary between two cells to place or remove a wall. Walls separate cells into distinct regions.
Rule 02Each region contains exactly one dot.
Every dot must lie inside its own region, and no region may contain more than one dot.
Rule 03Regions are 180°-symmetric.
Each region must look the same when rotated 180° around its dot. The dot is the centre of symmetry.
Rule 04Stuck? A hint toggles one edge.
The hint places or removes one wall to move you closer to the solution. In ranked play, each hint adds 15 s.
Tap an edge to toggle a wall · keyboard: arrows move, Space/Enter toggles nearest edge
Got it — play