Apps > Paid Apps > Games

Backgammon NJ HD
Jimmy Hu

October 8th, 2011



Price: $6.99

Category: Games

Updated: Oct 08, 2011

Version: 2.5.2

Size: 9.4 MB

Language: English

Seller: Jimmy Hu

Rated 4+

Requirements: Compatible with iPad.Requires iOS 3.2 or later


Customer Ratings

Current Version
     

(648 Ratings)

All Versions
     

(1826 Ratings)



Backgammon NJ HD by Jimmy Hu

Backgammon NJ HD Video

Backgammon NJ HD Screenshots



Description

*** Game Center enabled! Play matches online & chat. Invite a friend or be auto-matched with a random player. ***

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

Backgammon NJ HD is a full-featured backgammon 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 and Hints, Backgammon NJ HD 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, and a match equity table to achieve strong gameplay that will challenge even expert players.

REVIEWS

"[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 is without question the best backgammon program for the iPhone. It plays at a very high level and is such a good program that I often use it myself to practice." -Phil Simborg, Professional Backgammon Teacher and Player, www.thebackgammonlearningcenter.com

"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."

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 the in-depth, technical features included in the game to prove that it is honest (http://www.njsoftware.com/note.html)
- Who have the technical knowledge required to understand the use of the above features
- Who are willing to play lower skill levels if those levels are more suited for their playing skill
- Who will not insist on only playing the higher skill levels and expect to win consistently against those levels

If you fit all of the above, then this game is what you're looking for!

If the above doesn't describe you, then this game isn't right for you, and you will not be happy playing it. You will be much happier if you choose a different game with an easier AI.

INNOVATION

Wondering why other apps look similar to ours? - Hint/Undo/Menu buttons, Status Bar, background Game Center matchmaking, & more. We innovated from the start, introduced these features, & other apps simply copied us. They say imitation is the sincerest form of flattery...

But our world-class AI is what sets us apart. Without it, you can't give useful Hints or equity info. To improve your game, learn from the best!

FEATURES

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 (no internet req'd)
2-player mode on one device (no internet req'd)
Game Center: Play online with friends & other players (requires internet & iOS 4.2 or later)
Chat with your online opponent
Online ELO leaderboard
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
Email .mat match files
Options to reverse board direction, resign, use one-tap moves, auto bearoff, auto finish, & much more

What's New in Version 2.5.2

Version 2.5.1:

- Updated for iOS 5
- Modified difficulty of Easy & Medium skill levels. The new levels are:

* Easy: This level is in between the difficulty of the old Easy and Medium levels from the previous version.
* Medium: This level has been adjusted in difficulty to better reflect a 1500 ELO rating. This level is more difficult than the old Medium level from the previous version.

- New Game Center features:

* After a match ends, continue chatting if both players remain connected or view chat history
* Improved online ELO rating robustness

- In 2-player mode (offline & online with 2 human players), resigning a game with an equity less than or equal to 1.1 will offer to resign a single game instead of a gammon. This will allow players to resign a single game sooner. Previously, the threshold was 1.001, and players could only resign a single game when a gammon was nearly impossible. Now, players can resign when the gammon chance is low. Note: Accepting a resignation offered under these circumstances isn't optimal but can speed the match up.

Version 2.5.2:

- Fixed a graphical bug in the settings window in v2.5.1

Customer Reviews

Don't believe the doubters - this is the best gammon app in the store (5 stars)
There are several reviews that purport that the game somehow manipulates the dice rolls to give the program a strategic edge. This is totally untrue. The developer dispels this myth within the documentation on the APP and even allows you to (A) Preview the dice rolls before the game begins or (B) supply your own dice rolls. Either way the AI within the game is so good it is truly hard to beat.

Beyond that, this backgammon APP is al

One of the best on ANY platform (5 stars)
Top-level neural net-based AI bot meets world-class iPad touch interface. What's not to like? This app is every bit as strong as the better desktop apps, but it's more enjoyable to play because you touch the pieces instead of clicking. The developer has established a pattern of regular improvements. A must-have for any serious backgammon player. Playing this game will improve your skill. It's money well spent.

If you think the app

First-rate backgammon app that does NOT cheat - Here's how I know (5 stars)
When playing at the Expert level, Backgammon NJ will often play in a way that's unintuitive and looks too risky for the average player. Subsequently it will look like it got "lucky" and suddenly controls key positions on the board!

After looking at those types of play, I started studying classics on backgammon such as Magriel and began to understand many of the issues associated with probability, board control and bold pla

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