Hard Star Battle
Hard Star Battle puzzles are 9×9 with two stars per row, column and region. They need you to compare every way to place a unit's stars, and to see groups of regions that fill a set of lines.
Hard puzzles need at least one of these techniques, and may use any easier one:
- Placements
- Try every way to place this unit's missing stars without touching: they all agree on the marked cells.
- Shared lines
- These regions together fit inside as many rows or columns as there are regions, so they take all those lines' stars. The rest of the lines stay empty.
How to play
Star Battle is a logic puzzle on a square grid divided into outlined regions. Place stars so that every row, every column and every region holds the same number of stars, and no two stars touch, not even at a corner.
Easy puzzles are 6×6 and Medium 8×8, with one star per row, column and region; Hard puzzles are 9×9 with two. Every puzzle here has exactly one solution that logic alone reaches, and its level is set by the hardest technique it needs.
- Each row holds the number of stars shown above the board (one or two).
- Each column holds the same number of stars.
- Each outlined region holds the same number of stars.
- Stars never touch each other, not even diagonally.
Playing on this site
- Tap a cell to place a star, tap again for a dot that marks it as empty, and once more to clear it.
- Drag across cells to paint the same mark along the way; the whole drag is one undo step.
- With a keyboard, use the arrow keys to move and Space to cycle the mark.
- Dots are only a helper: the puzzle is solved as soon as every star is in place.
- Hint points out misplaced stars and dots first, then names the next technique and highlights where it applies.
- Your puzzle is saved in this browser, so you can come back to it later.