KNEE ON BELLY POSITION

Knee on belly (KoB) is the canonical top-control position in which the attacker has one knee pressing down on the opponent's belly while the other leg is posted as base. The position scores 2 IBJJF points and is one of the most-recognized modern competitive control positions. The KoB produces distinctive submission opportunities and creates significant discomfort for the bottom player while the attacker remains mobile enough to respond to bottom-player reactions.

The mechanics involve the attacker on top with one knee positioned on the opponent's abdomen (just above the hip line) while the other leg is posted out to the side as base. The attacker's body weight is distributed primarily through the knee on belly, producing the discomfort that gives the position its name. The attacker's hands are typically free for grip-fighting or submission attempts. The KoB is structurally a launching point for multiple attacks — armbar (when the opponent's arm exposes), cross-collar choke (gi), transition to mount, transition to back control if the opponent rolls, and various other options depending on the opponent's defensive reaction.

KoB has been used extensively at every level of competition. Notable practitioners include virtually every elite IBJJF competitor (the 2-point scoring makes KoB a high-priority position). The position is particularly important in scoring-oriented competition contexts. Defensively the KoB is countered by establishing frames against the knee, by hip-escaping out before the position consolidates, by attacking submissions on the attacker's posted leg, or by forcing the attacker back to side control through framing pressure.