What’s most popular than the King’s Indian Defense against 1.d4? Probably nothing. The King’s Indian Defense has a well-deserved reputation of spectacular battles often terminated with a massacre on White’s kingside castle. The philosophy behind this defense has always been the same, black plays a kingside fianchetto regardless of what white plays and then he attacks the center and depending on what kind of pawn structure arises black will attack one flank or the other, but the goal is the same black plays for the mate!