PiChain Puzzle is a free puzzle game developed by Aleksandr Kozodoy for Android users. The game is designed to test your analytical skills, attention to detail, and patience. The objective of the game is to reorder digits using rings in order to get them into numerical sequence. The game consists of 21 levels with gradually increasing complexity.

The first level is relatively simple and can be completed in three steps. However, the last level will demand your maximum attention and analytical skills. The game is operated via a simple scroll wheel interface where digits are interconnected with one or several circles, which can rotate clockwise and counterclockwise. Scrolling a wheel will change the numerical order of interconnected digits. Touching the circle will show which digits are connected with it.

If a level seems too hard, you can simply touch a number above the circles, and it will give you a prompt. All levels are available right away, so you can choose to start at any level you like, but we recommend moving through levels gradually. PiChain Puzzle is an excellent game for those who love challenging puzzles, and it is available for free on the Google Play Store.