[082349872349872]

solely a technical progression:

    white:    can write, [build, deploy,] and run a trivial program
    coloured: knows how to trade space for time, time for space,
                and will trade both for simplicity
    brown:    strong in either systems ∨ theory
    black:    strong in both systems ∧ theory

(as a counterpoint, my understanding is that for kendō players, the All-Japan champion may be ~3 dan, but the elite are ~8 dan, with the idea that a 3 dan player may win solely through superior speed & physique, taking advantage of the opponent's mistakes, but an 8 dan player should be able to shape the game to achieve a superior position despite having neither superior speed nor superior physique, by inducing the opponent to make mistakes.)