This is MC played in the [Stockholm underground]
. The winning move is Stora Mossen. The game has a considerably more humble following than its London counterpart, and there have never been any major championships outside Sweden. There are only three lines, which makes for some very tight play, and they are designated by colour rather than by name. Some interesting rule variants allow colour-mixing, and in the standard ruleset it's usually illegal to play matching colours for more than five consecutive turns.