pawdaw
It is for anyone who is mad enough to join in, as is the MM Links competition.
You have probably worked out the idea is to first-guess what the "link" words will be in Monday's Telegraph Herculis crossword.
The MM Links is essentially the same the only difference being that you have to guess what the setter (this month Christiania) has already chosen as her links.
In the Herculis links (KM) you guess word can be of any length, however in the MM links your guess word must be a minimum of 4 letters or a maximum of 8.
Join and enjoy the lunacy.
If you are really determined to join the asylum look out for the KM & MM links thread on a Friday evening.