35% first time (a few weeks ago), 49% today
Chess mentor teaches you to punish serious blunders xD

Aggression is the way to victory if brutal enough!
Grace is the key to triumph if sincere enough!
Bruteforce vs Grace?
Depends.
Either way you can win.
Imagine being a brute forcing unstoppable bull on the chessboard,
Or being graceful enough to sidestep the bull perfectly, and eventually land the beast in a trap!
Either way! Lol.
This one was just the most unpleasant lesson i had
http://www.chess.com/chessmentor/view_lesson?id=6266
i recommend you try it out
and share your opinion :D