Daily sky
Asterism
0:00
Paused
Arrow keys move. Space cycles a cell between empty, crossed out and star. X crosses out, Enter places a star, Backspace clears. Hold Shift with an arrow to cross out as you move.
Hint
Solved
- Time
- Hints
- Streak
How to play
- Place one star in every row, every column and every constellation (the outlined areas).
- Stars never touch, not even at a corner.
- Tap once to cross out, twice for a star. Drag to cross out several cells.
Every sky has exactly one answer, and you can always reach it by reasoning; no guessing needed.
Agent mode plain-text puzzle for AI agents
This is the same puzzle as plain text. An agent can read the block below, or load this page with ?format=text (or ?format=json), and answer with the column of the star in each row, top to bottom.
In the browser, window.asterism.text() returns the puzzle and window.asterism.submit("2 4 1 …") checks an answer. Agent solves are recorded separately from human ones.