Backgammon NJ for Android

Backgammon NJ for Android


(3 stars)


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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 won't expect to win consistently on the higher skill 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
• 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 you're having issues:
• Make sure a task killer isn't killing BGNJ processes.
• Exit other apps fully to free memory.
• Run BGNJ from main memory, not from memory card.
• We can't respond to crash reports submitted through Android OS. Contact us directly:

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Recently changed in this version

- Bug fixes for online play

- Auto-Roll & Auto-End Turn options
- Real-time match: option to End Match if opponent hasn't moved in 90 seconds. Partial Elo calculated, not an Abort.
- Analysis package (in-app purchase). Select Menu > Store.
- Match files list shows player names

Note: To play online, you must update to v3.2. This version transitions to Google Play Game Services Saved Games, which uses Google Drive & replaces an old service that Google is discontinuing.

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

    by Kisset5 on 03/02/2015

    Just get to 2217 versus computer at 1500 medium difficulty and see how RANDOM the dice are and if the computer's A.I. is really playing like it is 1500. Its a good gammon trainer but come on Jimmy stop making everyone out to be an idiot.

  • (46 stars)

    by Matt Ellison on 31/01/2015

    The best BG app I've tried. Costs a fiver, worth twice that. Easy interface, great AI, bug free ( on old HTC, just about to install on a new phone), awesome tutor mode. Love love.

  • (46 stars)

    by Chris Bradley on 31/01/2015

    How does the scoring work though? Seen some folks lose 14 points for a loss and some folks only lose 1.7 points for a loss?!?

  • (46 stars)

    by John Brewer on 26/01/2015

    The best backgammon app available. Beautiful design, great features, solid AI.

  • (46 stars)

    by Paul Warder on 26/01/2015

    So this dev has magically created an AI that fits into 12mb and beats me more often than Snowie on top level. Wow, how clever is that? ;)

  • (46 stars)

    by Joe Turner on 24/01/2015


  • (46 stars)

    by Ken Norian on 21/01/2015

    Toughest but the best

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