I know that this is not fair but here is how you to catch the LNM (which in my opinion is a worthy addition to the UFG):
susume in describing how to spot a Pure Jellyfish easily wrote:If a digit is not included in the 4x4 subset of givens, but does appear once in a row outside that subset, it forces the candidates for that digit into the remaining 4 rows of those 4 columns - i.e. a jellyfish. In Mauricio's last 5 puzzles, there are three such digits excluded from the 4x4 subset of givens and given once outside the subset - hence 3 jellyfish visible before any PMs.
in 16x16: You need a Puzzle with 64 of the clues in cells occupying the intersection 8 columns and 8 rows (an 8x8 set). Any value that
doesn’t appear in the puzzle will construct an LMN in the remaining 8 rows and 8 columns
This suggests that we need a the above puzzle with one missing value and the LNM will be available from the start!
You have to thank the minds of Mauricio and susume who made this possible!!!
The Octuplet needs an empty region and will not be in any puzzle that doesn't have one. The Septuplet will need a region with 1 or 2 known clues to appear
tarek
[edit: this is funny but this is to amend the way I’ve written the above]