A Mr. Sandbag's rating

...looks like a Sci-Fi monster, at the beginning ti is so small that you feel relaxed, and even want to caress it, and after 10 moves it becomes bigger, after 20 moves you are in trouble, Mr. Sandbag has already an advantage, and when you resign in around 30th move, you are swallowed by monstrous, abominable slimy giant, that cute little thing grew til an adult Alien, and you are dead.