A nickname given by

MOSP attendees to absurdly difficult geometry problems given to us by

Zuming Feng, one of the people who train our great nation's

IMO team.

These problems typically consist of a mix among old

IMO problems, historically unsolved geometry problems, and infernally difficult problems created by Zuming himself. They are the bane of

geometry-haters everywhere.

An example of an "easy" problem follows:

Let *ABC* be a triangle. Suppose that the circle through *C* tangent to *AB* at *A* and the circle through *B* tangent to *AC* at *A* have different radii, and let *D* be their second intersection. Let *E* be the point on the ray *AB* such that *AB* = *BE*. Let *F* be the second intersection of the ray *CA* with the circle through *A*, *D*, *E*. Prove that *AF* = *AC*.

Nope, we didn't get a diagram either.

Problems like there are why

geometry is evil.