Reinforce42

Logic puzzles

Sunbough

A little logic. A little sunlight.

Find a place for every bird in a calm world of branches and sunbeams.

Coming soon to the App Store

Illustrated branches, a small bird and warm sunlight on a pale green sky.

How it plays

Each board is a grid of trees. Place birds so that all four rules hold:

  1. Branches: one bird on each branch (each row).
  2. Sunbeams: one bird in each sunbeam (each column).
  3. Trees: one bird in each tree (each coloured area).
  4. Personal space: birds never touch, not even diagonally.

Every puzzle has one solution you can reach by logic, so you never need to guess. A hint explains the next step without changing your board, and there is a new daily puzzle.

Free on iPhone, paid for by ads. No in-app purchases and no account.