Star Battle Online
Star Battle Online is a free daily Star Battle logic puzzle where you place stars in a partitioned grid to meet row, column, and region quotas while no two stars may touch; puzzles reset daily.
Play Star Battle OnlineA fresh puzzle is waiting for you.
Star Battle Online offers browser-based Star Battle (Two Not Touch) puzzles with a daily handcrafted 10x10 classic puzzle and optional 8x8 easy puzzles. Each grid is partitioned into regions and requires placing the required number of stars per row, column, and region while ensuring no two stars touch, not even diagonally. The site requires no login and includes streak tracking and a verified unique-solution guarantee.
The site provides tools for both practice and tournament-style solving: an interactive step-by-step solver, printable ad-free worksheets, and an archive of past daily puzzles. It supports multiple sizes (8x8 with 1 star per unit and 10x10 with 2 stars per unit) and emphasizes pure logical deduction techniques such as pigeonhole overlaps, corridor parity, corner traps, and global parity counting.
How to play Star Battle Online
- On Star Battle Online open the daily puzzle or choose an archived grid to begin.
- Identify the required number of stars per row, column, and outlined region from the puzzle header.
- Place a star in a cell when you are certain it must contain one; the eight surrounding cells are then automatically invalidated and should be crossed out.
- Use crosses to mark impossible cells and apply line-region counting and adjacency rules to deduce further star placements until the grid is complete.
- Use the interactive solver or printable PDF if you want step-by-step reasoning or an offline copy with solution.
Tips for Star Battle Online
- Scan for regions confined to one or two rows or columns; their limited placement often forces stars into specific cells.
- Whenever a star is placed, mark all eight neighboring cells as impossible immediately to reveal long-range exclusions.
- Look for short linear corridors and apply alternating placement logic since a straight strip of length L can hold at most ceiling(L/2) stars.
- Use pigeonhole overlap: when rows and contained regions together require exactly the same number of stars, eliminate all other cells in those rows.
Star Battle Online FAQ
What is Star Battle Online?
Star Battle Online is a free browser platform for playing Star Battle (Two Not Touch) puzzles; it offers daily 10x10 classic puzzles and optional 8x8 easy puzzles. The site features verified unique-solution puzzles, an archive of past daily grids, an interactive solver that shows step-by-step logic, printable PDFs, and no registration is required.
Is Star Battle Online free to play?
Yes. Star Battle Online is free to play in any browser with no download or signup required. The site explicitly advertises ad-free puzzles, printable worksheets, an interactive solver, and historical archive access without charging users.
How many guesses do I get in Star Battle Online puzzles?
You do not need to guess to solve properly constructed Star Battle Online puzzles; each puzzle is designed to be solvable by pure logic. The site states that every featured puzzle has a unique verified solution and that guesswork or bifurcating is unnecessary when standard deductions are applied.
When does the new Star Battle Online daily puzzle appear?
A new daily puzzle is released each midnight on Star Battle Online. The site describes a daily handcrafted 10x10 puzzle released every midnight with streak tracking and an expanding archive of past puzzles.
Can I play past puzzles on Star Battle Online?
Yes. Star Battle Online provides an archive of past daily challenges that you can open and solve at any time. The archive includes previous 8x8 and 10x10 grids so you can practice older puzzles or revisit specific dates.
Are there different difficulty modes on Star Battle Online?
Yes. Star Battle Online offers multiple size formats and difficulty levels, such as 8x8 1-star easy puzzles and 10x10 2-star classic puzzles. The site presents these as progression options for newcomers and tournament-style solvers and provides associated strategy guides.
Is Star Battle Online like Wordle?
Star Battle Online follows the same once-a-day tradition as Wordle by publishing a single handpicked daily puzzle each day. The comparison is about frequency and daily play structure; Star Battle remains a different puzzle type focused on spatial deduction with unique-solution verification.
Who invented the Star Battle puzzle?
The Star Battle puzzle was invented by Hans Eendebak and first appeared at the 2003 World Puzzle Championship. The site recounts that Eendebak coined the name Star Battle for the puzzle originally introduced at the WPC in Arnhem.
