Okay, I'm a geek. I confess, the first thing I thought of was "Huh. That WOULD be a staggeringly interesting study. What effect would playing against a moderately attractive and completely nude female have on a chess master's rating?"
I mean, all the criteria are measurable. The game is free of any randomness, the rating is a reliable measure of skill, so the net result of playing against attractive naked women can have a statistically measurable effect.
I'm presuming a simple relational loss. IE., -10% to rating (or whatever). In such case, I imagine the original rating (as a number) of the master matters less than...I dunno, perhaps age? ?Maybe?
"Gagging on the arrow in your neck, clutching at the last fleeting shreds of life as the light grows dim, you find comfort in the knowledge that you've just done your very best to help an orc level up."