This H2O is a very interesting puzzle type. It used to appear in the puzzle championships around the year 2010 and also appeared in some of the World Puzzle Championships.
If you are new to puzzles and want to learn any of the puzzles, then quixy challenges are for you. In each of the Quixy challenges, there are 3 puzzles along with one solve example. The puzzle example helps you to understand the rules very clearly. Once you understand the rules, you can move on to solve the easy puzzle -> Medium and then the Advanced puzzle. So let's get started with this H2O quixy challenge.
H2O Puzzle Instructions
There are several molecules of water (H2O) in the grid, composed of two atoms of hydrogen (H) and one atom of oxygen (O). Locate the positions of the oxygen atoms, provided that no oxygen atom can touch another oxygen atom, not even diagonally. Atoms connect either in a straight line or at a 90-degree angle.
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