Hidden Oxygen Description: Figure out the correct arrangement of oxygen atoms.

Rules:
1) Oxygen atoms cannot be adjacent to each other, even diagonally
2) Numbers next to rows and columns tell how many oxygens should be in them
3) Each carbon atom needs 2 adjacent oxygens

Stuck? Press the hint button, which will explain how to come up with the next move.

FEATURES
• Advanced Hint System: explains how to infer the next move
• Interactive Tutorial: Walks with you through the basics
• Experience-Based Progression: Solve levels to gain experience and unlock new difficulties
• 5 Difficulty Levels: Start with small and easy boards. Build your skills by solving more demanding ones. Finally, crack the hardest puzzles – they will make your brain sweat
• Zoom & Pan: Ability to zoom in and move the board with pinch gesture
• Unlimited Undo: Revert as far back as you want
• Offline Play: No internet, no problem

If you like classic pen & paper puzzles or logic grid puzzles, you will love Hidden Oxygen. Check it out!

SEE ALSO
💙 Follow me on Twitter: https://twitter.com/MeekBits

ACKNOWLEDGEMENTS
Sincere gratitude to Katarzyna Kowalak (https://katarzynakowalak.com) for help with UI design.
Icons by Icons8.
Sounds and music:
• http://raisedbeaches.com/octave/
• http://dustyroom.com/free-casual-game-sounds/
• https://www.zapsplat.com/
• https://freesound.org/people/elijahdanie/