King's Indian Attack

By its nature, the KIA is a closed, strategic opening that presents its practitioner with common themes and tactics and a comfortable middlegame against various defences. White's most common plan involves a central pawn push, e4–e5, leading to a central bind, kingside space, and concrete attacking chances on a kingside-castled black king. Black's resources—more queenside space for example—are not to be underestimated. In fact, this asymmetry often leads to violent middlegames and neatly constructed mating nets involving sacrifices. Wikipedia
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