Backgammon NJ HD is a full-featured backgammon game for iPhone that offers a versatile and customizable gameplay experience. Developed by Jimmy Hu, this game allows players to play offline against the computer or against another person in 2-player mode. Additionally, players can also play online using the Game Center feature, where they can chat, invite friends, and auto-match with random players.

One of the standout features of Backgammon NJ HD is its customization options. The game offers more options than any other backgammon app, allowing players to personalize their board design and checker colors to their liking. Whether you're a beginner or a world-class player, this game caters to all skill levels, providing a challenging gameplay experience.

The artificial intelligence in Backgammon NJ HD is highly advanced, using a neural network-based AI trained on millions of positions. This ensures that the AI plays at an extremely high level, challenging even expert players. The game also includes Tutor Mode and Hints, which can help players improve their game by providing guidance and suggestions.

Overall, Backgammon NJ HD is a must-have for backgammon enthusiasts. Its versatile gameplay options, customizable features, and strong AI make it a top choice for players looking to play and learn backgammon on their iPhone.