I am not the greatest sharpie artist ,but hope this helps
Cut 1 is the face ,i personally use a humboldt
Cut 2 ,first side cut line it up with the hinge in the face
Cut 3 ,second side cut ,connect hinge with the first side cut ,now the triangle is made
Cut 4 , The final reg back cut start at the tip of the triangle you made ,when you hear stuff popping in the back cut ,run away like a little girl ,because the tree is going over
A longer bar is safer when cutting any chair prone tree ,cutting with the tip end of the bar ,it helps keep you more away from the tree if it decides to chair out
What the side cuts are doing is relieving the pressure in the log that wants to chair out ,once you cut those out ,it is much less prone to pop with that material gone .
The stump i posted was leaning about like the drawing ,and you can see how it ripped the fiber guts out going over slow vs chairing out .
On the question on the side cuts ,they are just one cut strait ,no wedge to them ,only wedge is the face .
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