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AI x0 (Tic-tac-toe) - UNBEATABLE!!

AI x0 (Tic-tac-toe) - UNBEATABLE!!
  • #: 34391
  • Price: $0.99 In Apple Store
  • Category: Games
  • Updated: 2017-01-04
  • Current Version: 1.7.1
  • 1.7.1
  • Size: 1.20 MB
  • Language: English
  • Seller: Elena Chiorsac
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.1.2 or later
  • © 2009-2010 OK Apps
  •  Add to Favorite apps



AI x0 (Tic-tac-toe) - UNBEATABLE!!


This one uses a robust AI (Artificial Intelligence) engine with a mathematically designed algorithm that ensures that it WILL NEVER lose!!

Your objective in this single-player contest of "The Human against The Machine" is to score as close as possible to the machine in a series of games.

- A win earns 2 points and a draw earns 1 point;

- At each game you can choose either to play as 'X' (thus making the first move) or as '0' (the machine makes the first move as 'X' then).


Used FREE sound samples from freesound.org.

Special thanks to individual contributors - see http://www.freesound.org/usersAttribution.php?id=1281637&format=html

Professional testing services for mobile applications provided by Nizam Abdallah.

The algorithm is an original adaptation and implementation for Objective-C of the idea explained in a classic Computer Science book:

Linger, R.C., H.D. Mills, and B.I. Witt, Structured Programming: Theory and Practice, Reading, MA: Addison-Wesley, 1979


Because the key idea is to demonstrate in action the power of a "pure" and deep recursive AI algorithm, this app does NOT contain any "hard-wired" knowledge database or "heuristics" regarding what move would be commonly known as a good move to make at start (or at any stage whatsoever).

Therefore, it does take a substantial amount of processing cycles for the Machine to "think" in order to make the very FIRST move when it is the one to go first (i.e. when you play as 'O', and the machine as 'X').

The exact time it will take greatly depends on the "raw power" (speed) of the CPU found in your particular device model.

From observations, it takes from about 7-9 seconds (on iPhone 3G S devices) and up to about 25-30 seconds (on some of iPod Touch devices).

What's New in Version 1.7.1

fixed screen scaling issues on iPhones with larger screens

iPhone Screenshots

AI x0 (Tic-tac-toe) - UNBEATABLE!! iPhone Screenshot 1
AI x0 (Tic-tac-toe) - UNBEATABLE!! iPhone Screenshot 2
AI x0 (Tic-tac-toe) - UNBEATABLE!! iPhone Screenshot 3
AI x0 (Tic-tac-toe) - UNBEATABLE!! iPhone Screenshot 4

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Rated 3/5 based on 2 customer reviews.


3/5 stars

No Option To Turn Off Sound...

Need option to turn off sounds. With this option, I would give it 5 stars.

4/5 stars

Pretty cool, but....

It's a cool app, would be much better with the ability to toggle sound on & off. The sound is mad loud and too friggin' annoying to play at work.


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The information may be outdated (2017-03-06 19:24:22). For actual information go to iTunes

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