تخته نرد - دو نفره

Major Game Update!

- Added Long Backgammon with dedicated rules and tutorial.
- Completely redesigned the AI for standard and long backgammon.
- Added three AI difficulty levels.
- Improved legal moves, checker bear-off, and scoring.
- Improved dice handling, including automatic rerolls for invalid rolls.
- Updated menus, hints, and in-game dialogs.
- Fixed bugs and improved performance and stability.