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Backgammon NJ

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

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

Backgammon NJ 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 & other players. Using Tutor Mode & Hints, Backgammon NJ 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 and friends." -Phil Simborg, Professional Backgammon Teacher and 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 and 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 points
• 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
• User-friendly, tap-to-move interface
• Highlighted checker movement options
• Hint & Undo
• Learn with Status Meter & 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 6.0.2

- 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 Screenshots

iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
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iPhone Screenshot 5

Customer Reviews

Plays well but unrealistic

I believe that the look and feel of This backgammon app is the best out there. I have read many other reviews and I have noticed that the developer is maniacally defensive about comments that the game is skewed toward the AI. I have to say, though, that after having played literally thousands of games on this app, there is absolutely no doubt that it is skewed toward the AI. Yes, I have a slight winning record but the incredible number of times the AI gets perfect rolls is just ridiculous. There is no risk a human player can make that will go unpunished and no opportunity for the AI that will go unfulfilled. I've also noticed that the game is "streaky". When I realize that the streak is in my favor I know I can make riskier plays,and play more conservatively when the streak is against me. The game has such good motion, appearance, and fluid motion I have been reluctant to give up on it. The time has come, though, where my frustration with the game has superseded the positive attributes. When the developer makes changes in logic to achieve more realistic outcomes I will gladly come back, but for now I am done with this game.

Incredible rolls

The game consistently gets incredible rolls.

And I consistently don't.

There's no way to assess winning rolls based on simple roll stats.

The program consistently gets good rolls. And I don't.

Update: After thousands of games, I hold the same opinion: the game simply gets consistently good rolls and I don't. I can't even recall the last time I had a run of good luck, winning a few games in a row, being down and getting several good rolls to surge ahead.

Update two: It just happens game after game. The developer can say what they want to. This program is "luckier" than any human being.

Update three: Just because the developer continues to post replies and ignore the experience of hundreds of experienced backgammon players does not mean the experience of these players is not true.


Update four: Amazing. Ask a developer to leave you alone and they just keep replying. Do they really think this endears future buyers of their app? Just send me info on how to get my money back and we can end this discussion. I'll delete it and we'll all be happy.

UPDATE FIVE: Thanks for the info on refunds. I'll be contacting Apple. They may not give me a refund because I've had the app for so long. You guys can still give me a refund if Apple refuses. Now I mainly want the refund because you're just a jerk. And that's what I'm telling Apple support.

Good Game, but flawed

I struggle to figure out why the game looks ahead. It definitely does, but can't get behind any reasoning to program such behavior. There is no benefit to the dev to have the game play ahead, as if they get more money if the game keeps better stats.

I maintain a decent record on hard, and stay ahead. It is still frustrating though, to have obvious predictions made on the AI's part. I've had many instances of obvious gammon/backgammon, where exact rolls were needed to get out, which were given, then exact doubles in a row just to save gammon by one roll. I've even had that scenario several times in a row.

Also, AI doubles, then heroically gets exact rolls to cover all vulnerabilities and cover all my advantages without missing a roll for several rounds.

As stated, these instances are not constant, as I maintain a winning record on hard; but, it's enough to be frustrating.

I also understand that true randomness allows for such occurrences. The problem lies where the stats for dice rolls stay at average when these things are taking place. The way around that is by loading you up with doubles, or rolls needed, after the opportunity has passed.

All that being said, it's still the best bg game I've found.

Backgammon NJ
View in iTunes
  • $4.99
  • Category: Games
  • Updated:
  • Version: 6.0.2
  • Size: 18.0 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 8.0 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

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