Solsticio

Solsticio Daily Puzzle for Sunday, August 9, 2026

Today's board is the same for everyone, everywhere. Solve it, keep your streak, and share your time — no spoilers.

Difficulty: Medium · 6×6

Tap a cell: empty → ☀ → ☾. Fill the grid to win.
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How today’s board is solved

Step by step, with no guessing. Every move below follows from the ones above it.

This board needs 28 deduced moves: 13 × no-three-in-a-row, 12 × line balance and 3 × contradiction.

Careful: this is the full reasoning. Play first if you would rather work it out yourself.
  1. C3 — the two cells before it are moons, and three in a row is not allowed, so it has to be a sun
  2. D4 — the two cells before it are moons, and three in a row is not allowed, so it has to be a sun
  3. B5 — the two cells before it are moons, and three in a row is not allowed, so it has to be a sun
  4. E5 — the two cells before it are moons, and three in a row is not allowed, so it has to be a sun
  5. C6 — the two cells before it are moons, and three in a row is not allowed, so it has to be a sun
  6. A1 — putting a moon there breaks the board a few moves later, so it is a sun
  7. C1 — the two cells before it are suns, and three in a row is not allowed, so it has to be a moon
  8. C2 — that line already holds all the moons it can take, so the rest are suns
  9. D1 — putting a moon there breaks the board a few moves later, so it is a sun
  10. E1 — that line already holds all the suns it can take, so the rest are moons
  11. F1 — that line already holds all the suns it can take, so the rest are moons
  12. F3 — the two cells before it are moons, and three in a row is not allowed, so it has to be a sun

The remaining 16 moves follow the same way.

Three simple rules