A path that is directly on your target line through the Impact Zone will result in a square strike and the ball will roll end over end.
Missing the sweet spot of the putter can cause a loss of up to 30% of the energy transfer into the ball.
Duffy was sacked last week after a two-day hearing in which he was found guilty of gross misconduct. It was all a fantasy, but an unhealthy one,' a source told the Sun.
IPCC commissioner Mike Franklin said: 'Police officers, by virtue of the powers vested in them, hold positions of authority and trust in our communities.
A face angle that is not square to your target line is responsible for about 85% of off line putts.
Keeping a square putter face through impact is a must to ensure the ball starts on line.