White can attack either the kingside or the queenside.
White's strategic ideas involve control of the e5-square without occupying it, but his first move is also non-developing and slightly weakens his kingside.
The notation for castling, in both the descriptive and the algebraic systems, is 0-0 with the kingside rook and 0-0-0 with the queenside rook.
Castling is indicated by the special notations 0-0 for kingside castling and 0-0-0 for queenside castling.
White's plans are to force g4g5 and open the kingside files to his advantage.
White will try to build up a strong centre with f3 and e4, or he may play for a kingside attack with f3 and g4.
Bg5, moving his forces to the kingside.
This brings him good prospects of a space advantage that may serve as a basis for a future attack on the kingside.
