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Backgammon NJ HD

By Jimmy Hu

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● 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
● UNIVERSAL -- Supports iPad, iPhone, & iPod touch
● RETINA -- Supports high resolution Retina screens of 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


• If an online match ends for any reason, you'll receive the Elo pts you deserve. FAQ:
• Online match disconnect info:
• We can't respond to reviews. Contact us directly:


• 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 (no internet req'd)
• 2-player mode on one device (no internet req'd)
• Game Center: Play real-time or turn-based online matches with friends & other players (requires internet)
• 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
• 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

What's New in Version 5.2.1

- 64-bit support
- Turn-based online match: send turn reminder to opponent (in Chat window)
- Send friend request (in Online Settings)
- Added "Toggle Pip Count" option to Double Tap and Swipe Left on Status Meter settings
- Fixed online invites and rematches in iOS 9
- Fixed bug in analysis mode where doubling errors for the game immediately following the Crawford game were not being recognized


iPhone Screenshot 1
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iPad Screenshot 1
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Customer Reviews

Needs education mode

Previously I said that I don't think it cheats but I have to change my opinion. After playing about 50 games I have started less than 20% of the games. Plus, it rolls doubles approx 4x more that I do. Across the last 21 games it roll doubles 103 times more than I did. That's not a total of 103 but 103 MORE. And yes, I mean it rolled over 5 doubles per game. It is fairly common for the AI to get doubles 3 times in a row.

While all of this is possible it is highly unlikely. If all is really fair why not list number of starts for each side or the number of doubles or the total PIPs rolled for each or the percentage of single roll exits into one available slot? These metrics are not a function of position, only dice rolls but the results are HEAVILY skewed in favor of the computer.

I gave it a 4 because this game works well and when we are rolling anything near parity it is fun. I have even learned to play better positions.

You guys crack me up

This is the best backgammon game there is. I have played 10,238 games in this app between my iPhone and iPad. I've probably played another couple thousand on other devices. I play on the hard level and win about 48% of the time.

For those of you who think the game "cheats" I have some questions: Why would it do that? Is NJ going to sell more copies of the program if it cheats? Do you think your phone feels better about itself if it wins? Do you think other apps are secretly plotting against you, or just this one?

Is it possible you're not as good as you think you are? On the expert setting, this game would be ranked in the top 50 players in the world. Are you in the top 50? Even at the hard level, the program is very good.

Try manually rolling dice and feeding those rolls to the program. It will still beat you because you're not that good. Try printing out the rolls in advance as is described on their website to verify that it isn't choosing rolls based on your moves. Switch rolls with it and see if it doesn't beat you.

This is a fun implementation. It's easy to use, is very quick, and it's fair. If you're looking for an AI you can beat all the time, you've come to the wrong place. This game will challenge you to be a better player.

Great backgammon.

I play this app a lot and love it. When playing the computer on Expert mode, it's taught me to be a much more aggressive and successful player. I love the auto-complete option if I don't want to complete a game against the computer but am interested to see how it might turn out, or just for bearing off.

I bought the optional "power user" package and love being able to filter online players based on skill level and completion rate. I really like the analysis portion of the power user, as I've gone back to carefully analyze games. It was a bit hard to initially figure out how that feature works, but it was worth it.

The only downside is that with some frequency, online matches disconnect. This occurs with friends as well as strangers, so I know it's not only someone abandoning the game.

Backgammon NJ HD
View In iTunes
This app is designed for both iPhone and iPad
  • $7.99
  • Category: Games
  • Updated:
  • Version: 5.2.1
  • Size: 37.4 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

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