About 0h n0
0h n0
by Q42
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Place red blockers so blue dots can see exactly the number of neighbors printed on their face — pure visual logic.. Try it now on Pixlland — no downloads, no sign-up, ready to play right in your browser on any device.
How to play 0h n0?
0h n0 is the sibling of 0h h1, also by Q42: blue dots show numbers that count how many OTHER blue dots they can see in straight lines (up, down, left, right), and red dots block the view. Fill every empty cell with blue or red so that each number sees exactly its count. Like its sibling, every grid solves by logic alone — no guessing required.
- Cycle a cell — Tap / click (empty → blue → red)
- Fullscreen — Press F or click the expand icon
Big numbers first: an 8 on a 9×9 grid needs long open lines — extend blues outward before anything else.
A satisfied number must be SEALED: once a dot sees exactly its count, cap every open line end with red.
A 1 next to a blue neighbor is done — red everything else around it.
Who made 0h n0?
0h n0 was created by Q42 and its source code is open under the custom-attribution license.
Can I play 0h n0 on mobile or desktop?
Yes — 0h n0 runs straight in the browser, whether on desktop, laptop, tablet, or phone. No install, no signup, no payment. Just open the page and play.
Is 0h n0 free?
Yes. 0h n0 is 100% free on Pixlland. Play as many sessions as you want, no limits and no hidden charges.