A test for golfers of all classes is the sideways putt on the inclined plane. Experience teaches that the ball rolls parabolically toward the valley. When estimating the break, people often swear over the apex of the parabola (stitch zm) and determine a break of 2∙zm (red line). In fact, the calculation yields that one must align along the tangent. This gives a break of 4 times the stitch dimension (black line). Closer to the hole with double break! Recommendation: Align along the curved stitch and double the measure of the break.