The next update is taking a while so I want to share what to expect.

New Features (i.e., pgn, pgn, pgn!):

• PGN import – useful for sharing across devices, backing up your data, sending to your chess coach, having a friend review your lines, etc.PGN is human editable so rather than take forever with nuances like FEN positions (this is an opening app, not a tactics trainer), it will have enough PGN that if you export a game from Chess Arsenal it can definitely be reimported.  If a particular file fails to load, you can choose “Mail to developer” for future support.

  So how do you get files onto your device?  The main way is to drag and drop into iTunes.  Or you can tap a PGN file within Safari, Mail, or any other app:
  

• PGN exports will include your opening names, and PGN Import will restore them.
• iTunes File Sharing will also get you to your main database, tucked away in a /Database folder separate from PGN imports/exports.  It has no use in other software but some of you want a pure backup.  This backs up what PGN does not: your training scores.  Also, anyone with problems can send it to me to debug exactly what’s going on.  There’s some risk in making the database public — it’s deletable! — but backup+problem solving are worth it.

Bug Fixes:

• Castling legality can become off by one move or more.  The fix requires care in order to run through the database and repair castling at every position.  So far, so good.
• A two-square pawn move can pass through other pawns!

This stuff’s been hairy to work with and I can’t nail down an expected date, but backups are invaluable and I think it’s worth the wait.

Happy Checkmates!
Brian