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The Pro version of Chess Openings Explorer, with a 3x larger move database, no advertisements, and a built-in chess engine. Step through over 1,000,000 chess opening positions, annotated by name and variation! Each position shows win percentage statistics and most popular variations. The new engine analysis mode allows you to play any opening against the computer.

Position statistics collected from over 1.9 million recent, high-level games.


******************** Testimonials ********************

"Brilliant - *****

Thank you for putting together a BEAUTIFUL opening app. I can't image anything better." -- by FraudAlert


"Excellent...NONE BETTER - *****

I love this app! It's fast, beautiful, and comprehensive. Makes it very easy to practice and learn all the most common (and rare) openings. The author is active on improvements, and takes user recommendations to heart. HIGHLY RECOMMENDED!!!" -- by ECHOOooo


"Great opening tool - *****

There are very few apps that I will take the time to review. However, this is one app that I use every day. It sharpens my opening knowledge Nd would be worth far more than the price at which I purchased it. Kudos."


"Awesome - *****

Easy to use. Easy to follow. Great for those indisposed multitasking opportunities... Strong work fellas!"

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Fixed a crash in "Play against the Computer" quiz mode.