Puzzles Solver is an application that I've uploaded to the Android Market some time ago. The idea for the application came from an old CodeProject article. In that article, I have presented a collection of some well known puzzles along with a mechanism for computer solving them. The puzzles were implemented as Java Applets, so it was easy to port them to Android platform. The application provides the following games:
  • 8 Queens: The player needs to place 8 queens in a chess board, so that no one attacks another.
  • Knight Tour: Guide a knight through all the squares of a chess board and return to the beginning.
  • Solo: Jump over pegs to remove them. Remove all but the last peg.
The application provides variations for all the games. It can also solve the puzzle for you. No pre-stored solutions are used. Instead the application tries to compute a solution on the fly, by applying a simple brutal-search algorithm.

In this article, I want to present all the design decisions I've made and the patterns I've followed, while developing the application. I hope that readers of the article will find them useful and perhaps re-use them on their own applications.


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