Umbra
greatest.gamesA free daily light-and-shadow logic puzzle. Divide the whole grid into fields of light and shadow: each field contains exactly one numbered given equal to its size, and two fields of the same shade can never share an edge. Question-mark givens hide their size and appear from midweek onward. A new puzzle every day, with a dated archive of past editions.
Umbra
Logic & Math
How to play Umbra
Umbra is a free daily logic puzzle. Divide the whole grid into fields of light and shadow. Every field holds one number equal to its size, and no two fields of the same shade may share an edge. A new puzzle is published every day at midnight US Eastern, and it.
- Some cells are already coloured and carry a number. Those are givens: you can never change them.
- A field is a run of touching cells of one colour. Each field holds exactly one given, and that given’s number is how many cells the field covers.
- Two fields of the same colour may never share an edge. Meeting at a corner is fine.
- A given marked ? works the same way, but its size is not written down — you work it out from everything around it. No field is ever larger than six cells.
- Tap an empty cell to cycle it light → shadow → empty, or drag to paint a run in one pass. A number fades once its field is the right size.
The facts
- Runs on
- greatest.games
- Category
- Logic & Math
- Languages
- English
- How often
- A new puzzle every day
- On BoreGame since
- September 2026
- Last updated
- September 19, 2026
- Price
- Free, no signup
Questions about Umbra
How do you play Umbra?
Umbra is a free daily logic puzzle. Divide the whole grid into fields of light and shadow. Every field holds one number equal to its size, and no two fields of the same shade may share an edge. A new puzzle is published every day at midnight US Eastern, and it. Some cells are already coloured and carry a number. Those are givens: you can never change them. A field is a run of touching cells of one colour. Each field holds exactly one given, and that given’s number is how many cells the field covers. Two fields of the same colour may never share an edge. Meeting at a corner is fine. A given marked ? works the same way, but its size is not written down — you work it out from everything around it. No field is ever larger than six cells. Tap an empty cell to cycle it light → shadow → empty, or drag to paint a run in one pass. A number fades once its field is the right size.
Where can I play Umbra?
On greatest.games. You can also start it from this BoreGame listing.
How it compares
If you play Umbra, the closest things to it in the catalogue are Fermi Unlimited, RNGdle and Shikaku of the day. They sit in the same logic & math category. See the full list of alternatives.
