You're looking for a new logic puzzle to sink your teeth into, and two names keep coming up: Star Battle (sometimes called Two Not Touch) and Nonograms (also known as Picross or Griddlers). Both are grid-based, both reward careful deduction, and both have devoted communities of solvers. But they feel completely different to play. This guide breaks down what each puzzle is, how they compare, and which one is likely to click for you.
What Is Star Battle?
Star Battle is a pure logic puzzle played on a square grid divided into irregular regions. Your goal is to place exactly two stars in every row, every column, and every shaded region — with one strict rule: no two stars may touch, not even diagonally. That's where the "Two Not Touch" name comes from.
There are no numbers, no pictures, and no counting runs. Every deduction comes from spatial reasoning: if a star must go in one of two cells, what does that eliminate in neighboring rows and regions? The logic chains can be short and satisfying or surprisingly deep, depending on the grid size. You can learn how to play Star Battle in a few minutes, but the harder grids will keep you thinking for much longer.
Two-star grids typically run from 8×8 to 10×10 (ours are 9×9 and 10×10). Solve times range from under two minutes for a beginner puzzle to twenty or thirty minutes for a large, tricky one. For more on how Star Battle compares to other familiar puzzles, see our piece on Star Battle vs Sudoku.
What Is a Nonogram?
A Nonogram (or Picross, or Griddler) is a picture-logic puzzle. The grid starts empty, and the edges carry numeric clues — one set for each row, one set for each column. Each clue describes the lengths of consecutive filled-cell runs in that line, in order. For example, a row clue of 3 1 2 means there is a run of three filled cells, then at least one gap, then a run of one, then another gap, then a run of two.
As you work through the overlaps and constraints, a picture gradually emerges — a cat, a rocket, a cityscape. The visual payoff is one of the most distinctive things about nonograms: there is a moment near the end where the image suddenly snaps into focus, and that feels genuinely rewarding.
Nonograms range from tiny 5×5 grids (great for beginners) to massive 25×25 or even 50×50 puzzles that can take hours. The arithmetic is straightforward — you are counting cells and comparing run lengths — but on large puzzles the bookkeeping can become intense.
How They Differ at a Glance
| Star Battle | Nonogram | |
|---|---|---|
| Goal | Place stars so every row, column, and region has exactly two non-touching stars | Fill cells to satisfy numeric run clues and reveal a hidden picture |
| Clue type | Grid regions (shapes) | Numbers along edges |
| Core skill | Spatial elimination and constraint propagation | Counting overlaps and run-length logic |
| Picture at the end? | No | Yes |
| Arithmetic involved? | No | Yes (counting cells and runs) |
| Difficulty range | Beginner to expert, driven by grid size and region shapes | Beginner to expert, driven by grid size and clue density |
Deduction Style: Spatial vs Numeric
The biggest practical difference between the two puzzles is how you think during the solve.
In Star Battle, every move is about space and position. You ask questions like: If this region can only place its second star in this corner, which cells in adjacent rows does that eliminate? There is no arithmetic. The grid regions are visual shapes, and your eye moves around the board looking for tight spots, forced placements, and chain reactions. Solvers who enjoy chess or logic puzzles with geometric intuition often take to Star Battle immediately.
In a Nonogram, you work line by line. You ask: This row has a run of seven cells in a ten-cell grid — where must those seven cells fall regardless of position? You calculate overlaps, cross-reference column clues, and update your understanding incrementally. It is still pure logic — a correctly constructed nonogram never requires guessing — but the flavor is more analytical and numerical.
Visual Payoff and Motivation
Nonograms have a clear edge when it comes to visual satisfaction. The picture that emerges at the end is a genuine reward, and themed puzzle books use this to great effect — holiday images, character portraits, and landscapes all become puzzles. For solvers who like a tangible outcome and a sense of "I made something," this is a meaningful advantage.
Star Battle's payoff is more abstract. The completed grid is a clean arrangement of stars that follows tight geometric rules, and the pleasure is the elegance of the solution itself — the sense that everything locked into place inevitably. It is a quieter satisfaction, but for many solvers it is deeply compelling precisely because the puzzle makes no concessions to decoration.
What Skills Does Each Puzzle Build?
Star Battle sharpens:
- Spatial reasoning — tracking which cells are eliminated across a two-dimensional grid
- Constraint propagation — seeing how one forced placement cascades through rows, columns, and regions
- Pattern recognition — spotting common region shapes and their typical star placements at a glance
Nonograms build:
- Numerical logic — quickly computing overlaps and minimum/maximum run positions
- Working memory — holding multiple line constraints in mind simultaneously
- Patience and thoroughness — large puzzles reward methodical, line-by-line progress over extended sessions
Who Should Try Which Puzzle?
Try Star Battle if you enjoy pure spatial deduction with no arithmetic involved, you like puzzles that feel more like chess problems than number exercises, or you want something you can pick up for five minutes and still make meaningful progress on. The easy Star Battle puzzles are genuinely approachable for new solvers, and the difficulty scales naturally as you move up through the difficulty levels.
Try Nonograms if you enjoy counting and run-length logic, you find visual rewards motivating, or you like the idea of a puzzle that produces a recognizable image when you're done. Nonograms also work very well in book form, making them a great offline option.
Of course, the two puzzles are not mutually exclusive. Many dedicated logic puzzle fans love both — they scratch different cognitive itches, and switching between them keeps your solving skills sharp from multiple angles.
Ready to Try Star Battle?
If this comparison has you curious about Star Battle, the best thing to do is play a few. Our free daily puzzles span every difficulty level, with no account required. Start playing Star Battle today and see whether the spatial logic hooks you — most new solvers are surprised by how quickly a five-minute puzzle turns into a twenty-minute obsession.