Eureka! Star Battle

Endless Star Battle logic puzzles. Generate, solve, and challenge yourself.

Eureka! Star Battle is a fun logic puzzle for those who love deductive reasoning. Generate endless puzzles, challenge your mind, and experience the Eureka moment.

THE PUZZLE Place exactly 2 stars in every row, every column, and every region. Stars may never touch each other — not even diagonally. Every puzzle has a unique solution reachable through deduction.

FOUR DIFFICULTY LEVELS • Easy — Pure deduction, no search required. Perfect for learning the rules. • Medium — Moderate reasoning chains. A satisfying daily puzzle. • Hard — Requires careful multi-step logic. For experienced solvers. • Expert — Deep deductive chains that will challenge even seasoned puzzlers.

FEATURES • Endless puzzles — Generate new challenges anytime • Challenge friends — Share puzzles and compete for the best time • Undo/redo — Full history, no mistakes are permanent • Hints — Get help when you’re stuck • Mosaic mode — Create your own custom puzzle regions • Clean, intuitive controls • Fun star and space facts as you play