Castling is a move in the game of chess involving a player's king and either of the player's original rooks. It is the only move in chess in which a player moves two pieces in the same move, and it is the only move aside from the knight's move where a piece can be said to "jump over" another.
Black v white
D5
Kings gambit is harder to pull off from black side.
Is there a Sicilian variation of Kings Gambit?