Any grizzled USCF chess tournament veteran knows a player who essays the Kings Indian Defense is chomping at the bit to attack the White King. However if Black gets too frisky with his attacking ambitions, his own Kingside can become rather breezy and be vulnerable to Queenside and center encroachment by White.
In the following blitz game played at ICC, MrPlanck (must be a physics guy) allowed the following position on the Black side of a King’s Indian Defense. He just played Qc8 with the intentions of winning the e6 pawn. Nd5 looks like a sensible reaction, but since the c7 pawn is guarded by the e8 Knight …….. maybe not.
A better move than Nd5 turns out to be 14. a6 when the natural move b6 is answered by the very strong Nd5. Now the natural Qxe6 loses to 16. Nxe7 because of Qd5 check winning a whole rook at a8! Remember, every tactic must be based on double attack and a hanging piece. Moral to this story: Natural looking chess moves can lead to completely lost or busted positions.