AppAdvice has teamed up with Arhanto Technolabs in order to offer you a chance to win one of 20 promo codes for Reversi NX ($0.99) for iPad.

The iPad is an absolutely perfect device for playing board games. There is no need to set things up, no need to keep track of tiny pieces, and no need to clean up a mess when you’re done, which is why every single iPad owner should have at least one board game installed. If you don’t have one yet, here’s your chance!

More than just black and white.

Reversi NX is a digital take on the classic board game most commonly referred to as Reversi, although some of you may know it by its trade name, Othello. In the game you take turns with your opponent placing colored pieces on the board in an attempt to block your opponent’s pieces in with two of your own, which results in all of the pieces in between being turned your color.

The goal, of course, is to have the majority of the pieces on the board your color. You can only place a piece on the board if it results in a capture, so don’t even think of trying to claim the corners of the board ahead of time! This process goes on until the entire board is filled with pieces and a winner is crowned.

Reversi NX includes five different CPU characters, each with their own level of difficulty. You’re also provided with an unlimited amount of undos, and the opportunity to choose from one of six colored pieces. If you have a friend close by, you can play a head-to-head game on the same iPad.

To have a chance at winning one of five Reversi NX promo codes, simply hit that blue tweet button near the bottom of this page or retweet this post from your favorite Twitter app before 11:59 PM PST Sunday, December 18. We will then search the Twitterverse for all of the retweets and randomly choose our lucky winners. The winners will be notified via Twitter, so please be sure to follow us so we can send you your promo code via a direct message.

Non-Twitter users and those of you who want to increase your odds of winning can simply leave a relevant comment below before 11:59 PM PDT Sunday, December 18 to have a chance at winning one of the other 15 promo codes.

Feel free to participate in the giveaway via either or both methods. Only one entry per person per method is allowed, totaling up to two entries per person if using both.