Important Note on Variations
It's important to keep in mind that you are not expecting to win every point with these variations, and maybe not even most of the points. Sometimes you will make a mistake when trying to vary your game. That's OK - don't worry about it.The idea behind using these variations is that they make your main strategy more effective for longer by preventing your opponent from making correct guesses about what you are going to play next. If you used your main strategy 100% of the time, your opponent would quickly adapt and start to guess what you are going to do.
By changing to another variation every so often, your opponent has to wait to see what you do, rather than using his anticipation to make the correct shot. He can't afford to move too early, since he knows that you always have a couple of options up your sleeve that you are prepared to use, even if you don't always make the shot. Just knowing that you might hit his long-pimpled push forces him to cover that shot, making it harder for him to cover your other shots.
