- Fixed a problem with opening PGN attachments

- Fixed a bug that was making it difficult to tap the Annotations (pencil) button

- Users can now choose to store PGN files in local storage or in iCloud Drive
- Removed the previous system of synchronizing PGN files via iCloud

- Fixed a bug with the "Edit Position" feature

- NOTE: This version removes the old system for playing online games and chatting with online opponents. If you're still playing games using the old system, please finish those games and switch to the new system. (You were told this transition was going to happen more than a year ago.) The new system is called "Play online" and is accessed via the cloud button on the main toolbar.

- Added support for Dark Mode
- Added support for split-screen mode on the iPad
- Increased the size of the opening library to 75,000 moves

- Fixed a bug where some "Play online" games could get unsynchronized and stuck
- Added a message to explain that "Play online" games are not necessarily real-time

- This update adds a new system for playing online. You can access it by tapping on the cloud button on the main toolbar. It should be much easier to use and more reliable than the old system. The old system is still included, so if you have active games, you can finish them. But it will be removed in a future version of tChess. I hope you enjoy the new system!

- Support for the iPhone X screen resolution and layout
- Bug fixes

- Fixed a problem with the "Edit Position" feature

- Updated for iOS 11

- New "Analyze Game" feature: see an overview of the entire game in seconds
- Native support for the iPhone 6/6+ screen resolutions
- New "Benchmark" feature: measure your iOS device's performance
- Optional "Revert" toolbar button
- Optional "New game" toolbar button

- New “Toolbar buttons” feature allows you to customize the main toolbar
- New (optional) Game Center toolbar button allows you to quickly access the list of turn-based Game Center games
- Fixed a bug that was causing Profile information to be deleted in some cases
- Fixed a bug that was causing tChess to crash in some cases when submitting Game Center moves
- Compatible with PGN files that don’t have spaces between move numbers and moves
- Time controls now carry over to new games
- Shortcut in the Annotation menu allows you to enter a new annotation with one tap

- Added a "Dark background" option in the Appearance menu
- Fixed a problem with the PGN Database feature that prevented the "Open games at beginning" option from working and that prevented the previous/next game buttons from working

- Redesigned to match Apple's latest design language!
tChess has a new look, but retains its "classic" look on older versions of iOS.

- All-new support for PGN, including variations!
- New move annotation viewer/editor supports multiple annotations, variations, and NAGs per move
- Support for nested variations (variations within variations)
- New PGN tag editor supports arbitrary tags
- New time control editor
- Supports an unlimited number of saved games

- Self-play mode
- Playback mode
- Export to camera roll
- Printing (via AirPrint)
- Remembers which game is selected in each PGN file
- Can play against any other version of tChess (Lite, Pro, etc.) via Game Center
- Ability to send messages to Game Center opponents
- Added the back and forward toolbar buttons during Game Center games
- Improvements to the engine; now much better at finding optimal checkmates

- Support for iCloud to synchronize PGN files (requires iOS 6.0 or newer)
- Option to sort saved games alphabetically
- Ability to search PGN files by tChess saved game name
- Feature to revert to a PGN game
- Option to give imported PGN files unique filenames if there's a conflict
- Feature to rename PGN files
- Improvements to the chess engine

- Support for the iPhone 5's new screen size and iOS 6
- Learn Chess is now full-screen on the iPad
- Option to flip all the pieces when it's black's turn (for two-player games)
- Option to use the hint button to toggle Analysis Mode
- New menu to set defaults for saving and exporting games (default recipient, etc.)
- Saves all rated games to "rated_games.pgn"
- Support for complete Forsyth-Edwards Notation

- Support for the new iPad's Retina Display
- Optimized 3-D engine (over 3 times faster!)
- Redesigned menu system
- Online play (Game Center) improvements

- Added support for German, French, Japanese, Korean, and Chinese

- Added support for turn-based Game Center (new for iOS 5)!
- Added support for annotations in PGN files.
- Updated the interface for selecting PGN files (and removed the 25 file limit).

- Added Game Center support. Play chess with your friends in real time!!

- Added support for dual-core processors (iPad 2). Enable it in the Settings menu and Analysis Mode will calculate 50-80% faster!

- Automatically exports all saved games to "saved_games.pgn" (iTunes file sharing)
- Pauses the chess clock when tChess isn't the active app
- Improved compatibility with the PGN file format
- Fixes an orientation/rotation problem with iOS 4.2.1 on the iPad

New for iOS 3.2 and up:
- Ability to open chess game (PGN) file attachments
- Support for iTunes File Sharing

New for every iOS version:
- Improved variability of opening moves
- New Position Editor options
- New Database options
- New editor for PGN tags
- Exports games as PGN file attachments
- Improved performance for iOS 4

- Support for iOS 4.0
- Support for Retina Display
- Replaced 2-D Staunton pieces with high-resolution photorealistic raytraced pieces
- Improved animation smoothness
- Adjusted engine strength vs. rating
- Improved engine strength in endgame
- Increased maximum number of PGN files

- Added landscape mode for iPad

- Added hand-painted 2-D wood and marble graphics
- Added freely-rotating 3-D board with high-polygon-count Staunton pieces and dynamic lighting
- Improved engine strength by 10 ELO
- Added iPad support

- New "Database" feature: download and view PGN files!!
- Replaced the computer's difficulty levels with ratings: play against any ELO rating, from 500 to 2500
- Replaced the Statistics feature with the new "Profile" feature: play against the computer for rating points, and track your progress with the Rating History feature

NOTE: This update replaces the existing Statistics feature. Please write down your current statistics if you want to save them.

- Added Captured Pieces display
- Added "Copy & paste game" feature
- Added "Flip top pieces" feature
- Corrected toolbar icon size in OS 3.x
- Improved engine strength by 30 ELO

- New Statistics feature
- Displays opening names and codes from Encyclopedia of Chess Openings
- New Opening Library feature
- Integrated Learn Chess app
- Scores in Analysis Mode now displayed from white's perspective
- Increased opening database size to over 15,000 moves
- New blindfold mode