Fill every cell with a Sun or a Moon. The two symbols differ by shape, not colour — a rayed disc versus a crescent.
- Tap a cell to cycle empty → Sun → Moon → empty. Locked clue cells (gold corner pip) never change.
- Each row and each column must hold exactly three Suns and three Moons.
- No three identical symbols may sit next to each other in a row or column.
- A sign on a border sets the two cells it joins: “=” the same, “×” different.
- Conflicts are ringed in coral and the broken sign is outlined; the live tally tracks filled cells, time and conflicts.
- Stuck? Hint fills the next forced cell; Show solution reveals the whole grid.
Sun — a rayed disc Moon — a crescent = joined cells are the same × joined cells are different