There never was a system that'd beat roulette or any percentage game.

Thorp believed it was possible to beat roulette even without help from flaws in the wheel.

She tells him he propped open his eyes with matches, was working on a system to beat roulette.

Beating roulette was potentially lucrative.

The frugal professor had heard that the rooms were cheap, and he was still toying with the idea of beating roulette.