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Backgammon NJ HD

By Jimmy Hu

This app is only available on the App Store for iOS devices.


● GAME CENTER -- Play online, chat, invite friends, auto-match with random players
{ Real-time } Play online in real-time
{ Turn-based } Play online at your own pace
● VERSATILE -- Play offline vs. computer or against another person in 2-player mode
● CUSTOMIZABLE -- More options than any other backgammon app
● UNIVERSAL -- Supports iPad, iPhone, & iPod touch

Play & learn backgammon at skill levels from beginner to world-class!

Backgammon NJ HD is a full-featured game which uses an advanced, neural network-based, artificial intelligence. Play against a computer AI, another person in 2-player mode on one device, or online against friends & others. Using Tutor Mode & Hints, Backgammon NJ HD can show you how to improve your game.

Discriminating players will appreciate how well the AI plays. It uses a neural network trained on millions of positions, a bearoff database, & a match equity table to achieve strong gameplay that will challenge even expert players.


"[I] know strong bg play when I see it. This app is the strongest iPhone bg app I've played with by far. It does not cheat period. ...Analyzing these matches with eXtreme Gammon confirms a world class level of play with normal luck factors. If you are losing, get over it. So would 99.9% of the other backgammon players in the world. It is just that good. Learn from it." -Richard Munitz, Giant of Backgammon, #21 world ranking in 2009

"Backgammon NJ plays at an extremely high level with an excellent interface, and I often use it to practice on my iPhone when I am traveling. I recommend it highly to my students & friends." -Phil Simborg, Professional Backgammon Teacher & Player,

"I've played over 500 games now; I've checked about 5% of these against World Class Desktop programs (GNU, BGBlitz); and I've actually used some of the competition. NJ has the best interface & has more useful functions than any other backgammon apps out there."

"For serious backgammon players, Backgammon NJ is the way to go.", May 2012


This game is best for people:

• Who recognize the strength of neural network backgammon bots
• Who want to improve their game by playing against a world-class level AI
• Who will use the in-depth, technical features included in the app to prove that it is honest (
• Who won't expect to win consistently on the higher skill levels


• Neural network-based AI
• 2 game types: Standard Backgammon or Nackgammon
• 4 skill levels: Easy, Medium, Hard, Expert
• Customizable board design & checker colors
• Mersenne Twister algorithm for random number generation
• Doubling cube
• Single games or match play up to 25 pts
• Crawford rule for match play
• 1-player mode vs. computer
• 2-player mode on one device
• Game Center: Play real-time or turn-based online matches with friends & other players
• Chat with your online opponent
• Online Elo & Experience leaderboards
• Block list for auto-match
• Tap-to-move interface
• Highlighted checker movement options
• Hint & Undo
• Learn with Tutor Mode
• Game & dice stats, including Elo rating & ER
• Match info: GnuBG ID, win chances, equity, top 10 moves, cube decisions
• Email match files
• Practice mode with unlimited undo (1-player vs. computer)
• Manual match recording mode with unlimited undo & speed mode option
• Options to reverse board direction, resign, use one-tap moves, auto bearoff, auto finish, use Jacoby rule, & much more
• Match analysis (in-app purchase): Analyze past match files, view moves & errors for match, step through match, jump to position, play from position, save match files permanently


• If an online match ends for any reason, you'll receive the Elo pts you deserve. FAQ:
• Online match disconnect info:
• Contact us for help:

What's New in Version 6.0.3

- Added "Random" and "Alternating" options to Checker Movement setting. These options will take effect each time you start a new match.
- Option to display point numbers
- Game Center: In iOS 10, invite friends to play through Contacts. More info:
- Bug fix for "Play Position with Same Rolls" option in analysis mode
- Bug fix for crash when sending match files on iOS 10

- Bug fix for checker movement direction in turn-based matches


iPhone Screenshot 1
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iPad Screenshot 1
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Customer Reviews

Why the AI wins!! What you need to know!

Let's get right to it. While the dice rolls against the AI are randomly generated, it is not "fair" because the AI can now "look ahead" and make moves based on what it already knows you are going to roll! That's why some reviewers are upset because the computer leaves blots and openings but you can never land on them because it looks ahead! Sadly, this is not the "best" learning tool because the AI will leave blots or make seemingly bad moves since it already knows what's going to happen. If you copy down the randomly generated rolls and then replay the game manually your winning percentage will increase. So...why four stars? Because YOU can look ahead too and make it a bit fairer. It's also a pretty good AI when you play in manual mode but it does "cheat" so deduct one star. It's lots of fun if you don't take it too seriously!

First-rate backgammon app that does NOT cheat - Here's how I know

When playing at the Expert level, Backgammon NJ will often play in a way that's unintuitive and looks too risky for the average player. Subsequently it will look like it got "lucky" and suddenly controls key positions on the board!

After looking at those types of play, I started studying classics on backgammon such as Magriel and began to understand many of the issues associated with probability, board control and bold play.

My own game is improving tremendously with this app. It plays great, has a wonderful interface and is incredibly priced, especially if you compare it with Snowie and the likes. The teaching mechanism is superb: you can define different levels af mistake at which the hint button glows; if you feel like it just press the button and see the recommended move.

If you doubt that it plays fair, do what I did: play 30 matches rolling your own dice, and see for yourself if Backgammon NJ does not keep defeating you at the same ratio it did before! Or you can also read the author's explanation on how to verify the random number generator used by the app.

Highly recommended if you are looking for a real backgammon app!

An exemplary backgammon app!

I use Backgammon NJ HD daily, and could scarcely be happier with it. I'm amazed by the functionality, I love the beautiful, intuitive design, and I particularly appreciate the fact that it's an app clearly made by someone who knows backgammon as well as he knows programming. That someone is Jimmy Hu, and I've developed great respect for the fact that he always responds to any inquiries or suggestions with speed and courtesy.

A quick word about people who think "the dice are rigged" or "the app cheats." First, you can PROVE to yourself that this isn't so; see how in the instructions. Second, why would any programmer make such an app? I'm not aware of ANY backgammon app or bot that cheats.

This is an absolute gem, and every detail of its description is accurate. You'll love it.

Backgammon NJ HD
View in iTunes
This app is designed for both iPhone and iPad
  • $7.99
  • Category: Games
  • Updated:
  • Version: 6.0.3
  • Size: 45.3 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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Top In-App Purchases

  1. Power User$4.99
  2. Analysis Package$2.99
  3. Online VIP$2.99