The Search for Planet X

How it plays

1. 1It needs the free companion app. The sky is 12 sectors (18 in the expert game), each holding exactly one object: a comet, an asteroid, a dwarf planet, a gas cloud, truly empty space, or Planet X, which looks empty. Where each kind can be follows fixed logic rules.
2. 2Actions cost time, and whoever is furthest back on the time track goes next. There are four: Survey asks the app how many of one kind of object lie in a stretch of sectors; Target tells you exactly what is in one sector (twice a game each); Research gives you an extra logic rule; and Locate Planet X.
3. 3Only you see your results, in the app, and you note them on your own sheet.
4. 4At set points on the track comes a Theory phase: place an object token face down on a sector to claim that is what is there. Theories are revealed and checked later; right ones score, and the first to publish scores more.

How you win

Once someone locates Planet X, which means also naming what lies in the sectors either side of it, everyone else gets one last chance and the game ends. Add theory points and the points for finding Planet X; the highest wins.