The Mona Lisa has been the subject of more scholarly attention than any other painting in the Western tradition. Art historians have argued about the identity of the subject for five hundred years. Engineers have used spectral imaging to look beneath the surface layers. A Harvard neuroscientist published a study in 2000 arguing that her smile appears differently depending on which region of the retina you're using to look at it. She has been stolen, faked, vandalized, and insured for more money than most countries' GDPs.
What she has not done, across any of those years and any of those analyses, is given anything away.
That property is specifically valuable in competitive Rock Paper Scissors. A tell is a behavioral signal that leaks information about your next throw before the reveal happens. Tells come from the face, the hands, the shoulders, the breathing cadence, the small adjustments the body makes when a decision has been committed to before the count is finished. Managing tells is one of the central skills of competitive play. The players who advance deepest in tournament brackets tend to be the ones who give away the least.
The Mona Lisa's expression is not trained neutrality. It's structural ambiguity. Nobody knows what she's thinking because the painting was designed — or just happened, which is more interesting — to produce an expression that resists classification. The academic term for this is "sfumato," Leonardo's technique of blending edges so softly that the boundaries between shadow and light remain undefined. The ambiguity isn't a limit of his skill. It's an application of it.
The painting lives in the Louvre in Paris behind bulletproof glass, and on crowded days the room holding it is barely manageable. The WRPSA art series considers this appropriate. A portrait of the most unreadable player in five centuries deserves a significant crowd.