Numeric Notation

From Shoryuken Wiki

                   .- up (u)
                   |
  up+back (ub) - 7 8 9 - up+forward (uf)

      back (b) - 4   6 - forward (f)

down+back (db) - 1 2 3 - down+foward (df)
                   |
                   `- down (d)

Note: These numbers can be easily referenced by looking at your keyboard "numpad". Think of it as a joystick/controller that is facing to the right. "5" is used to signify "neutral".