STREET FIGHTER II The World Warrior - Playing RYU vs M. BISON (Capcom Arcade Stadium edition)

Read about playing the classic SF II for free and it's true. It's part of Capcom Arcade Stadium on Steam. Oh the nostalgia!
Installed it yesterday and worked my way through the roster where, at the end, you'll have to face the four original (but unplayable) kings Balrog, Vega, Sagat and M.Bison. These arcade bosses are notorious and can be quite hard to beat, but...there is a save option, so you can keep trying without having to start all over again.