APP_GAME_UpgradeChess

APP_GAME_UpgradeChess

A version of chess ([APP_GAME_Chess]) where the figures can be upgraded.
All figures except for the king and queen are pawns at startup.
Each player has upgrade points. They get x more in y turns. (Adjustable in the source code)
With the circular button on the left, the selected figure can be upgraded.
Upgrades have a cost. It's cheaper to upgrade pawns instead of other figures.