Backgammon NJ for Android

Backgammon NJ for Android

5,000 - 10,000 downloads

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● Google Play Game Services -- Play online in real-time, chat, invite friends, auto-match with random players

Play & learn backgammon at skill levels ranging from beginner to world-class! This app is designed for both Android phones & tablets.

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

(Reviews for iOS version)

"[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."

"As someone who has played a lot online (FIBS, Gamesgrid, and others) and live, playing this app (on its hardest setting) is like playing a master player or like playing GNU."

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 are willing to use in-depth, technical features included in the game to prove that it is honest (
• Who are willing to play lower skill levels if those levels are more suited for their playing skill
• Who won't insist on only playing the higher skill levels & expect to win consistently against those levels

• Neural network-based AI
• 2 game types: Standard or Nackgammon
• 4 skill levels: Easy, Medium, Hard, Expert
• 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
• Google Play Game Services: Play real-time online matches with friends & other players
• Chat with your online opponent
• Online Elo leaderboard
• 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
• 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
• Optimized for resolutions up to 2560 x 1600

If you're having issues:
• Make sure a task killer isn't killing BGNJ processes.
• Android Accessibility options have known bugs. Turn off all options under device Settings > Accessibility.
• Exit other apps fully to free memory.
• Run BGNJ from main memory, not from memory card.
• We can't respond to crash reports submitted thru Android OS. Contact us directly:

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Recently changed in this version

- Online play: BGNJ now attempts to maintain your online match connection for a short period to give you time to dismiss an alarm, phone call, etc.
- Fixed a bug where the navigation bar wasn't hidden when returning to the board.

- Added workaround for Android Accessibility bug.

- We can't respond to crash reports sent thru Android OS. Contact us directly:
- Known Google bug #1:
- Known Google bug #2:

Comments and ratings for Backgammon NJ for Android
  • (69 stars)

    by ialwaysreply on 28/06/2014

    The developers get really defensive when you say something bad about this app. Usually because people wrongfully accuse the game of cheating. Well, I'm afraid it's true. What happens is about once per game I get skipped and the computer gets to roll the dice twice in a row. I dont know if it's a bug or plain cheating, but it can greatly affect the outcome of the game. 5 star review after the

  • (69 stars)

    by Steve Balough on 20/06/2014

    Computer ai is good, although the super aggressive stategy works better for the cpu than it does for me... one thing I'd add: in the dice roll stats, show me how many times im getting the same roll (ie. 4-2 or 2-4) 2 3 4 5 times in a row.

  • (69 stars)

    by george bare on 14/06/2014

    This app really sucks !!! If you are a serious player, accustomed to calculating dice odds, this app will weaken your game. It consistently wins by defying all logic.....awful !!!

  • (69 stars)

    by Vicente Garambone on 12/06/2014

    There's not much to say about a backgammon game. I bought this because I was convinced it was fair with the dices. After 100+ matches I really believe it's not fair. Although I can't prove it.

  • (69 stars)

    by Lovey H on 11/06/2014

    On the whole, I like this version. The dice rolls don't seem as biased toward the computer as some of the versions I've played. I like the variety of game settings available. The only thing that I don't like is there is no way to bump off a problem player. This can negatively affect your stats as some poor losers refuse to finish a game leaving you no choice but to abort the match and move on t

  • (69 stars)

    by Paul Radley on 04/06/2014

    Best backgammon program I have found. It can play an incredible back game which I love to compete against! April 2014...... Latest version has a very annoying feature! Each time the program is started it tries to access online features. You have to wait while these come up and get cancelled before play can start. I do not want these online features and wish I could simply start play without del

  • (69 stars)

    by Andrew Cox on 30/05/2014

    Great offline program, I enjoy playing the high calibre and diverse range of people online.