Mathematical Games suitable for undergraduates I am looking for mathematical games for an undergraduate `maths club' for interested students. I am thinking of things like topological tic-tac-toe and singularity chess. I have some funding for this so it would be nice if some of these games were available to purchase, although I am open to making the equipment myself if necessary.
So the question is: what are some more examples of games that should be of interest to undergraduates in maths?

There's a few mathematical/logical games that the WFF 'N Proof people have out there.  I won't link to Equations, because I think that game least likely to come as interesting for undergraduates (but maybe I'm wrong).
I've only played WFF 'N Proof.   But, I will say that it teaches you propositional calculus and helps you to construct your own logical systems.
They have a game called On Sets which helps you learn set theory.
A Real Numbers game... which I don't think teaches you about Cauchy sequences or Dedekind cuts, but probably still has value to it.
A game called Configurations which has a sequence of geometric puzzles based on a book about Projective Geometry called The Geometry of Incidence which you can find on their website or on Amazon or possibly in your library.
They also have a solitaire topological game/puzzle called QWIK-SANE.
