On sale for a limited time

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Chess Quest is an excellent learning tool for virtually any Chess player, from those who merely have a basic grasp of how the game works, to advanced players.
- http://www.appleiphoneapps.com -

For the beginning to advanced chess player this is a great source of puzzles that will keep you thinking for some time.
- http://www.iphoneappreviews.net -

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Improve your chess tactical skills! 1200 chess puzzles were thoroughly prepared by world famous grandmaster Leonid Yudasin-Olympic Champion, two-time World Championship contender, USSR Cup winner, Israel champion, as well as winner of dozens of prestigious international competitions. A trainer for many years, he mentored 5 GMs and a number of chess masters.

Features included:
- 1200 positions with tactical solutions, most of which were created particularly for this application
- 6 levels of increasing complexity–from novice (600-1100 rating points) to Master level (2100-2400)
- All problems underwent deep analysis
- Solution tree contains all meaningful variations for both sides

source : itunes.apple.com