Tidal Planets

Dock one 16-mass planet in each polar harbor within sixteen burns. Select a planet, then an empty or equal planet in the same row or column: it travels along that clear straight path, fusing at the destination. Every burn turns the tidal asteroid barrier between diagonal and cross positions around the star. You cannot cross the star, an asteroid, or another planet. A planet left on a newly flooded asteroid square is safe but must leave before another can arrive. A 16 in either polar harbor locks there. Two anchor charges let the next burn hold the current tide instead. Total mass is fixed: merging the two 16s into 32 cannot satisfy both harbors. Keyboard: Tab and Enter/Space operate buttons; R restarts.