Ultima Reversi Pro 1.1.0

the author of this app says:

Challenge your strategic skills with Ultima Reversi Pro!

Reversi (also known as Othello) is a very challenging board game for all ages.
The rules of Reversi are much simpler than any other board games.
However, easy to learn doesn't mean easy to play well.
It offers so many strategic possibilities, that you can spend the rest of your life to master it.

Ultima Reversi Pro is a professional version of Ultima Reversi, having many great features to customize the game and make it more interesting.
Challenge your strategic skills with Ultima Reversi Pro!

Features:
* No Ads.
* 1-player mode (Human vs CPU).
* 2-players mode (Human vs Human).
* Watching mode (CPU vs CPU).
* 8 levels of difficulty.
* Extremely strong AI at higher levels, even for those who have mastered the game.
* Various board size (4x4, 5x5, 6x6, 7x7, 8x8, 9x9, 10x10).
* Various board color (Green, Blue, Red, Yellow, Silver, Gray).
* Various rules (Normal mode, Negative mode, Revolution mode).
* Unlimited undo support.
* Cool graphics and sound effects.
* Sound on/off switch.

======= FREE VERSION =========
For lite users, the free version is now available as well!
It works the same as the Pro version, except limitations as follows:
* Supported by Ads.
* 5 levels of difficulty.
* Board size 9x9 & 10x10 is not available.