Chess Lesson 1:
Denying the King Castling of the opponent (even if by sacrificing the Material, or even if Queen) to get a very very strong attacking on Enemy King => Opponent is in severe pressure => You are winning! (even if the opponent is World Number 1!)
Mr. Topalov, The ultimate entertainer along with Anand
Here is the game!
Chess Lesson 2:
Winning material is not the ultimate goal!, Checkmate is!
Opponent was grabbing all the stuff, Li was creating the mating net!
Check the end game, last 10 steps.
Here is the game!
Chess Lesson 3:
Pinning the peices to King, will immobilize the development => you are losing the game!
Opponent can't move peices, if he does, he looses the peices and the game. Opponent resigned! Cheparinov won!