KEEP THIS HANDY
Controls at a glance.
- Click / tap a tile
- Cycle its state as shown by the tutorial.
- How to play
- Use the original host’s explanation before starting a larger board.
A pair restricts its neighbors
If two adjacent tiles in a row are red, another red immediately before or after them would make a forbidden triple. The same reasoning works vertically. A red, empty, red pattern also forces the middle tile to the other color. Work through one row and its intersecting column whenever you place a tile.
Counting becomes useful near the end of a line
Every finished row and column contains equal numbers of the two colors. On a four-cell line, two tiles of one color fill that color’s allowance. The remaining cells must use the other color. Count the entire line, because a locally legal tile can still exceed the allowed total.
Compare lines after the obvious deductions
Two completed rows may not match, and the same restriction applies to columns. Use a nearly finished line and a completed one to test whether a choice would produce a duplicate. Check the no-triples rule and the color count again after making that deduction; all three constraints must hold together.
What happens to your progress?
Use the original host’s current puzzle options. No cross-device puzzle sync is promised here.
Check the save and backup guide ↗A FEW USEFUL ANSWERS
Before the next click.
Is guessing required by the rules?
The objective is to satisfy the constraints. Begin with forced placements from pairs, counts and duplicate lines before trying a guess.
Are rows allowed to repeat?
No. Completed rows must differ, as must completed columns.
A useful next read.
0h h1: solve the next tile without guessing. ↗Follow the source.
Q42 / Martin Kool; source archive by Floris Luiten. Licence notice. MIT source archive; original game credits retained.
Latest collected source change: Dont return to the main menu when pressing "back" during the game end fade, but return to "select a size" instead (opens a new tab) . Repository activity does not identify the hosted game version.
All media and source credits ↗
