Solsticio Daily Puzzle for Thursday, September 17, 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
How today’s board is solved
Step by step, with no guessing. Every move below follows from the ones above it.
This board needs 27 deduced moves: 17 × no-three-in-a-row, 8 × line balance and 2 × contradiction.
Careful: this is the full reasoning. Play first if you would rather work it out yourself.
- C1 — the two cells before it are moons, and three in a row is not allowed, so it has to be a sun
- F1 — the two cells before it are moons, and three in a row is not allowed, so it has to be a sun
- F3 — the two cells before it are suns, and three in a row is not allowed, so it has to be a moon
- F4 — the two cells before it are moons, and three in a row is not allowed, so it has to be a sun
- E5 — the two cells before it are moons, and three in a row is not allowed, so it has to be a sun
- F6 — that line already holds all the suns it can take, so the rest are moons
- A1 — putting a sun there breaks the board a few moves later, so it is a moon
- B1 — that line already holds all the moons it can take, so the rest are suns
- B2 — putting a sun there breaks the board a few moves later, so it is a moon
- B4 — the two cells before it are moons, and three in a row is not allowed, so it has to be a sun
- A4 — the two cells before it are suns, and three in a row is not allowed, so it has to be a moon
- D4 — the two cells before it are suns, and three in a row is not allowed, so it has to be a moon
The remaining 15 moves follow the same way.
Three simple rules
- No three in a rowNever three suns or three moons in a line, across or down.
- BalanceEvery row and column holds the same number of suns and moons.
- Connectors (= and ×)Later puzzles add clues between cells — same or different.