Chess - Free by CNVCS: free puzzle app for iphone, ipad

There are many free chess apps available.  Do a search for cnvcs at the app store.

This particular version has lots of bells & whistles. You can play chess at a variety of levels.

Of particular note is the list of chess puzzles - some 38,000. What would make them better: if each puzzle were classified. For example: Mate in 2. Another problem is that the player can make 12 silly wasteful moves and still achieve checkmate, which negates the true nature of the puzzle.

Guo Kuang is the author of this chess puzzle app. Here's what he said about my puzzle app blog: "Because of the Great Firewall of China, I can't visit the blogspot.com. What a pity!" I told him about my qualms and he said it's a good idea.