From EvilHack, under the basis that anyone trained in martial arts (or
is in a powerful kicking polyform or wearing kicking boots) should be
immune from landing such a poor kick. This bypass used to happen only
50% of the time; now it happens all the time.
Note that this only averts the "Your clumsy kick does no damage" case:
it remains possible for a powerfully kicking player to kick clumsily and
have the monster evade or block, for example if they are fumbling or
wearing bulky armor.
Also, documentation: I added a comment explaining what the incredibly
dense and confusing logic is with i and j happening here, for the next
poor soul that has to read that code.