#1 chess game. functions missing

[Konstantinos Papas]

Hi,
Playing the game I realised that certain functions are missing some of which are serious.
1. When a soldier reaches the rival's side of the baord there is no option of changing the piece to another stronger.
2. Castling is not allowed
3. When a king is threatened the player should be obliged to protect him at the next move
4. Finally the game should end when a king is threatened and has no way to protect himself, not when someone captures the other's king without noticing.