"One consequence of self-handicapping is that dominance distinctions are less evident in play than in other contexts."
"The term 'self-handicapping' denotes that an animal's behavior reduces its probability of achieving its tactical objective in play and thereby prolongs the play interaction. Such behavior appears inconsistent with the statement that animals seek to win playfights. Loizo's dominant chimpanzee initiated a playfight by fleeing from its subordinate; ..."
Robert Fagen - Animal Play Behavior
"Effort restriction: An animal restricts their strength, skills, or social potential while playing with a partner and does not use their full power during the play interaction. This includes role reversals in which the animal with superior abilities assumes the role of the weaker or losing partner. For instance, a stronger animal allows a weaker one to chase."
Milada Petru et al. - Revisiting Play Elements and Self-Handicapping in Play
Marek Spinka et al. - Mammalian Play: Training for the Unexpected