Alias · Top Positions
45-degree mount defence
Also known as Quarter Mount — Bottom — the canonical term used on this site.
Training background: Descriptive term for the angle
Descriptive — defending the 45-degree quarter mount
45-degree mount defence is a descriptive name for the quarter mount bottom position — naming the defence against a mount angled at roughly 45 degrees.
Etymology. “45-degree” describes the transitional angle of the quarter mount, partway between side control and full mount; “defence” frames the bottom player’s response. The label names the position by its characteristic angle.
Mechanics. Defence depends on staying off the flattened back to keep frame capacity: turned onto a side, the bottom player can post frames to block the knee from climbing into full mount, whereas flattened they lose the leverage to resist. Holding the angle and the frames is what prevents the quarter mount settling into mount.
Cross-reference. “Half-mounted” is a sibling alias. Full mechanical coverage on Quarter Mount — Bottom.