Backgammon NJ for Android

In-app purchases
3.6
2.27K reviews
10K+
Downloads
Content rating
PEGI 3
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About this game

● Versatile -- Play offline vs. computer or against a friend in 2-player mode
● Customizable -- More options than any other backgammon app

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 or against another person in 2-player mode on one device. 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.

IS THIS GAME RIGHT FOR YOU?
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 (https://www.njsoftware.com/note.html)
• Who won't expect to win consistently on the higher skill levels

FEATURES
• 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
• 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

IMPORTANT
If you're having issues:
• Make sure a task killer isn't killing BGNJ processes.
• Run BGNJ from main memory, not from memory card.
• We can't respond to crash reports submitted through Android OS. Contact us directly: https://contact.njsoftware.com
Updated on
Sep 2, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

3.6
1.88K reviews
Steven Overloop
September 3, 2023
Bought this because apparently xgmobile is not available anymore. Analysis requires an additional purchase, not a fan of that. Analysis itself is decent, but luck is not analysed. You can export and/or mail the games though, so that's not a deal breaker. There are many options but changing the board isn't one? Anyway, have to play around with it a bit more, but definitely a decent backgammon game for Android. I think I will use this app a decent amount of time.
2 people found this review helpful
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Ernest Lansdale
June 18, 2022
The game recently lost all of my history. It started over and, I got up to 100 games before it lost those stats too. My last game, brought me here to report that I just gammoned the game but, only got 1 point and, no acknowledgement in the statistics. I play the game alot. It's frustrating to see it glitching like this. It turns out the setting for the Jacoby Rule was on. I've never played with it before. It must have happened when I lost my stats. It was a full reset.
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Jimmy Hu
June 19, 2022
Are you playing single games w/ Jacoby rule on? If so, gammons & backgammons don't count unless one side has doubled already. We don't know what happened, but if you "clear storage" for BGNJ, then all data (including settings & stats) will be deleted. Jacoby is off by default, so it would have been off if your settings were reset.
Glenn Zorpette
January 22, 2025
I have noticed, statistically, that around the time I start bearing off, my probability of rolling 1-2 or 1-1 goes to near 100%. Meanwhile, the computer's probability of rolling 1-2 or 1-1 plunges, as far as I can calculate (after hundreds of games). In addition, probabilities of rolling doubles seem to be very, very high for the computer early on in the game--when doubles are extremely advantageous. Yours, not so much. You will tire quickly of this insulting nonsense.
26 people found this review helpful
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Jimmy Hu
September 2, 2024
The app is honest & has random rolls. Proofs here: https://www.njsoftware.com/note.html

What’s new

v4.8:
- Updated for latest Android API level