Special Moves :Castling

Castling as I said before consists of rook and king. In this the rook and the king more or less swap places. The king moves 2 squares away from its initial position and the rook moves next to it (king) on the other side. However there are some requirements for this special move to be played.

Castling is permissible only if all of the following conditions hold:

1. The king has not moved (prior to castling);
2. The chosen rook has not moved (prior to castling);
3. There must be no pieces between the king and the chosen rook;
4. The king is not in check.
5. The king must not pass through a square that is under attack by enemy pieces.
6. The king must not end up in check (true of any legal move).
7. The king and the chosen rook must be on the same rank.