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Note: This version of Deduce requires iOS 8 or later.

Deduce is a fun way to learn and visualize the process of logical deduction for players of all ages. It's a uniquely challenging game of deduction (and a small element of luck) played with six-letter words. Deduce a mystery word by exercising both your vocabulary/spelling skills and your ability to make logical inferences. The goal is to discover the mystery word with as few guesses as possible. Deduce acts as an assistant who enforces the rules, provides hints, keeps track of your progress, sets up match games, and awards achievements. No ads, no in-app purchases, just pure fun!

Reviewers have said:
"One of my favorite games", "Other games get installed-played-uninstalled, but this one stays", "Challenging and addictive", "Very original and lots of fun", "I'm completely hooked", "Hope I can stop playing it soon!"


1. Game Center integration. Statistical results, scores, and saved games are associated with the active Game Center player. If you are not logged into Game Center, you may supply your own player name for separate game tracking, or play anonymously. If you use Game Center, scores are reported to Classic, Novice, and Match leaderboards. A Champions leaderboard ranks the overall quality of your play over time. Achievements may be earned based on the quality and persistence of your game play. As you earn Deduce achievements discover 50 19th century literary giants of the western world, who were also masters with words. A portrait medallion is awarded for each achievement -- collect them all!

2. Online Matches will return in a future update. You may play a Deduce match race with an opponent, or challenge a friend by selecting his or her mystery word yourself. If you are not racing to deduce the same word, watch your opponent's game as it's played. Text chat during or after the match.

3. Mystery Word definitions. When you finish a game of Deduce, a definition of the mystery word is provided. Increase your vocabulary as you play more games.

4. Game records. Mail beautifully formatted PDFs of your games or matches to yourself or others, or print your games using AirPrint.

5. Global settings. Use the Settings App to specify global options for Deduce, such as autosave (which automatically saves a limited or unlimited number of your completed games).

6. Easy access to social media. Find a particular game really challenging? Post it to Facebook or tweet about it to your friends.

7. Improvements to the user interface, improved marking and unmarking, and easier game play. Use letter dials or the keyboard to enter your guesses. On an iPhone or iPod touch, pinch/spread the guess list to enlarge it for easier manipulation. On any device, swipe across the guess list to eliminate or restore guesses with no hits. Reorder your guesses at any time.

8. Select your favorite photo as a backdrop for playing Deduce.

What's New in Version 3.4

Caution: Deduce 3.4 requires iOS 8 or later! It features the following improvements:

• Full iOS 8 support, and tested with iOS 9 betas.
• Native support for iPhone 6, 6 Plus, and future models, using autolayout techniques.
• Greatly improved performance.
• Fixes for many small, but annoying bugs.
• A new reset button offers a convenient way to clear the input staging area when using the letter dials or the software keyboard.
• For iPhone and iPod users, a small button near the upper left of the list of guesses makes it simple to enlarge (or shrink) the list for easier tapping on individual letters.
• If you were using the Autosave feature to automatically save each of your completed games, go to the Apple Settings app, scroll down the list of apps on the left until you find Deduce, then switch the Autosave button off and back on again. This will re-activate the Autosave feature. Note that autosaved games show up in the Deduce Game Manager section, and do not include games that you resign (unless you choose to save them manually yourself).
• You may notice that we removed the “floating words” option. That feature is now redundant. Use the Suggest button to find words matching specific patterns, or tap on Sherlock in the Menu dialog to see a random list of words in the backdrop.
• And finally, some news: we expect to be able to restore Deduce’s multiplayer capability with the future release of Deduce 4.


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