Castling is only possible once. And if Rook moves or is captured, casting is impossible in that direction, and if King moves, casting is impossible at all.
Now the two Kings can face each other. That is, it is okay if King and King are in the same file or rank, and there is no piece between them.
If a player can no longer move or drop a piece, the game is a draw.
[Changed points]
Castling is only possible once. And if Rook moves or is captured, casting is impossible in that direction, and if King moves, casting is impossible at all.
Now the two Kings can face each other. That is, it is okay if King and King are in the same file or rank, and there is no piece between them.
If a player can no longer move or drop a piece, the game is a draw.