About 0h h1
0h h1
by Q42
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Fill the grid with red and blue tiles using only three logic rules — no three in a row, balanced counts, no repeated lines.. Try it now on Pixlland — no downloads, no sign-up, ready to play right in your browser on any device.
How to play 0h h1?
A binary logic puzzle by Q42 with three rules: fill the grid with red and blue tiles so that no three tiles of the same color sit adjacent in a row or column, every row and column holds exactly as many reds as blues, and no two rows (or columns) are identical. Tap to cycle a cell between empty, red and blue — every puzzle has exactly one solution reachable by pure logic.
- Cycle a tile — Tap / click (empty → red → blue)
- Hint — On-screen hint button
- Fullscreen — Press F or click the expand icon
Start with pairs: two reds side by side force blue on BOTH ends — the "no three in a row" rule is your strongest opener.
When a row reaches its quota of one color, every remaining cell in it flips to the other color instantly.
Never guess. If you are stuck, count colors per row/column — a forgotten quota is almost always the unlock.
Who made 0h h1?
0h h1 was created by Q42 and its source code is open under the custom-attribution license.
Can I play 0h h1 on mobile or desktop?
Yes — 0h h1 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 h1 free?
Yes. 0h h1 is 100% free on Pixlland. Play as many sessions as you want, no limits and no hidden charges.