Games for IB - Chess vs. Poker vs. Bridge?

Questions says it all: Provided you are a young, sound buck of quick mind (let´s be honest, most of us are), what´s the best game to mentally prepare yourself for 1. Expected value calculations and 2. "Mental chess" (e.g. price negotiations etc.)

A lot of people in finance play poker, and I´ve heard it´s good for both aspects, some play chess, like myself, but it is very linear in a certain way. And of course Daddy Warren is a hardcore bridge fanatic, which I never played, but it´s supposed to be very multi-dimensional with it´s calculations.

What´s your take on that? Which game is best suited for an analyst with a bit of time on his hands?