Rules, examples, and variations for Ghosted Rooms — a novel grid-based logic puzzle.
Overview
Ghosted Rooms is played on a grid of symbols. The solver’s task is to partition the grid into rooms with fixed shapes. Each room is either empty or contains distinct symbols; the shapes of the rooms are given and rotations/reflections are allowed. There is exactly one correct partitioning for each puzzle.
Example
Given the grid:
And the possible room shapes (rotations and reflections allowed):
The solution is:
Further Extensions
- Puzzles may use rooms of different sizes within the same grid.
- The symbol sets are not limited to numbers: letters or other sequences may also be used.
- Grids and rooms may be irregular in shape, not just rectangular.
- Some cells may be designated as forbidden (black cells), similar to crossword puzzles.
- In some puzzles, erroneous entries may also appear. In such cases, the puzzle has no valid solution until the incorrect symbols are removed.
Keywords
Logic puzzle · Recreational mathematics · Grid partitioning · Room shapes · Ghosted Rooms
License
- Puzzle description / rules / abstract → CC BY
- Concrete puzzle instances (grids, examples, booklets) → CC BY-NC
