More efficient compression of Jigsaw Puzzle images for improved wide-color support and reduced download size

v 5.9.1: Works around bug on A9/A10 devices (details below), thanks to Alex Jacoby. v 5.9.0: - Chess algorithm now 100 times as fast as old algorithm. (Reason: when searching for a move, it now uses “αβ pruning” in its search tree.) Offers “Extra Hard” difficulty level. - Gomoku algorithm now plays better and runs 1000 times as fast as old algorithm. (Reasons: more efficient data structures, increased search depth, and “αβ pruning”.) Offers “Extra Hard” difficulty level. - Supports Wide Color displays. - Minor aesthetic improvements. v 5.9.1 details: Replaced an 8-bit unsigned integer with a 16-bit unsigned integer to work around a bug in the A9 and A10 GPU's handling of the former, which had led to incorrectly displayed walls in Torus Games maze when running on devices with A9 and A10 processors. Many thanks to Alex Jacoby for reporting this bug.

- Chess algorithm now 100 times as fast as old algorithm. (Reason: when searching for a move, it now uses “αβ pruning” in its search tree.) Offers “Extra Hard” difficulty level. - Gomoku algorithm now plays better and runs 1000 times as fast as old algorithm. (Reasons: more efficient data structures, increased search depth, and “αβ pruning”.) Offers “Extra Hard” difficulty level. - Supports Wide Color displays. - Minor aesthetic improvements.

- Launch-screen format satisfies new App Store requirement - Toolbar height adapts to default for iPhone or iPad

Updated for iOS 13

- Updated for iOS 11 and 12 - Older versions of Torus Games, for iOS 5 through iOS 10, are still available on the App Store. Please contact Jeff Weeks (help@geometrygames.org) for instructions on how to download them. - Apples game uses constant number of worms

Reorganized sound effects playback to avoid unwanted hesitations in animations

- Graphics rewritten using Metal, with fallback to OpenGL ES on older devices - New Jigsaw Puzzle images - Torus Games is now "device-assignable" for easy installation on school iPads via MDM

- 適用於 iOS 8 和 9 - 增加密鋪顯示（僅適用於 iPad）

- 使用雙指滾動 - 可選的難度級別 - 改進漢字輸入 - 環面遊戲可在 Android 和 iOS 平台上執行

感謝鄒燕清的中文翻譯

Finnish translation added, thanks to Jouko Koskinen

Added 3D mazes and 3D tic-tac-toe

Various small improvements

Greek translation added, thanks to Stavros Papadopoulos