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Backgammon NJ

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
● 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:
• We can't respond to reviews. Contact us directly:

What's New in Version 5.3.4

- Practice mode: 1-player mode with unlimited undo. Statistics are not tracked in this mode.
- Option to display checker counts on points with 6+ checkers & on bearoff trays
- Option to display pip count in white for both players
- Autoplay Forced Moves: Added full & partial moves option
- Option to play from position with same rolls as match file (in analysis mode). Note: This will only work if the original match was played with automatic rolls, and the RNG seed wasn't changed during the match.
- Bug fix for analysis mode

iPhone Screenshot

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iPhone Screenshot 5

Customer Reviews

Expert mode is rigged, friend play doesn't work

I thought since this app was paid and had so many great reviews it would at least use some aspect of Machine Learning to make the computer more difficult. But no, it rigs the dice to make the computer more difficult. I was fed up with just feeling like it was rigged, and since I'm an unemployed statistician with too much time on my hands, I decided to do an analysis on rolls. Without a doubt, the expert mode computer has an insanely large number of "favorable" rolls while I receive an abnormally large number of "unfavorable" rolls. Also, one of the main reasons I purchased this app was so I could play my boyfriend. However, "play a friend" mode does not work properly and keeps telling either of us that the other has forfeited the game (although neither of us have). So really this app isn't any better than the rest of the backgammon options out there.

After several hundred matches

I've been playing
backgammon for over 30 years and have never had any opponent with this much "luck"or skill. Before I wrote this review I played over 500 best of five game matches at the expert level only. I've noticed that I get an incredible amount of 2-5, 6-3 and 6-3 opening and subsequent moves, and that I get hit and boxed in about 40% to 60% of the time. Whereas my opponent gets nothing but cover moves and doubles with regularity. No matter what moves I make I get hit 90% of the time. In real and tournament play it is never happened to me. When I do hit my opponent yes usually back on the board between one and two moves usually one. Not so when I'm hit. It can take me anywhere from 6 to 9 rolls before I can get back on. I'm not qualified to say it's rigged but I am qualified to say something's just not right with this game.

Years in.... (Update)

Patience pays off. After playing this game for years it was finally updated to include game analysis. It shows a list of all the moves in a game and the error level.

Customer support has been great. The game interface has improved a lot in the years since I first got this. I love the analysis list. I do have a request? Can you add a 2 ply mode? I think phones are fast enough now. I have been playing another 2 ply game and I like this interface much better.

Don't let the players who are still learning to play and accuse the game of cheating keep you from improving the AI.

Backgammon NJ
View In iTunes
  • $4.99
  • Category: Games
  • Updated:
  • Version: 5.3.4
  • Size: 18.9 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