[SAump]

When the pitcher jump turns or jab steps, his center of gravity is directly below him and in front of the pitcher's plate. {23}

It is impossible for him to turn left without moving his pivot foot in the direction of 3B, unless he were to back up first. {25}

OR shorter

There is no requirement to back up or step off the back of the plate during a legal pickoff attempt. {20}

As long as he is in contact with the ground and his lead foot steps in the direction of 1B, his attempt meets the legal requirement of a pickoff move. {30}

Out of the "hole" in 25 words or less?

The fastest possible jab step occurs when the pivot foot steps directly toward 3B and the non-pivot foot steps in the direction of 1B {45-degrees}. {25}