Problem MFL-10. A short single axiom for Moufang loops. Is there a single axiom for Moufang loops, in terms of product and inverse, that is simpler than the one given in Cor. MFL-9 (p. ??)? That axiom has 10 variables, 24 occurrences of variables, and 5 occurrences of inverse; using Otter’s measure, it has length 52.