While we’re all waiting for the WPC instructions, here’s a Checkered Fillomino that Silke Berendes made for the Puzzle GP finals. The organizers chose her Yajilin instead, so now you can solve it here. Thanks!
This was another type on the mixed round. It seems that “knapp daneben” almost works better for checkered fillominos than for the plain ones.
Rules Add or subtract 1 from each clue, then solve as a standard Checkered Fillomino.
Here’s a Checkered Fillomino, flowery theme.
I made a couple of puzzles for the Polish qualifiers back in February. I previously posted two more puzzles which didn’t make it: Angle Loop, Doubleback.
One Minesweeper puzzle (with an unknown number of mines). The kind of puzzle that just feels too trivial when constructing, although in the end I think it’s quite ok.
One Pentominous, with the obvious PL theme.
Finally a small an tricky Checkered Fillomino.
Today marks the start of a series of Checkered Fillominos on croco-puzzle, check them out! (Solving on time will require making an account; they become freely playable after one week. No Java required.)
Here’s an extra one; the croco series starts out a bit more gently than this.
Two more Checkered Fillominos. I made a bunch of them for the 24 hours that take place in Budapest this weekend. These here use some different logic. The first one turned out to have an easier break-in that circumvents what I had in mind, but maybe the similarities help as a hint?
I hope you enjoy these Checkered Fillominos as much as I do. This one came out clearly too hard for this year’s 24h puzzle championship in Budapest. (April 17-19, I don’t think it’s too late to join.)
EDIT Fixed an amibiguity. (Hopefully. Thanks Prasanna for finding it.)
The German qualification is through. The puzzles will be available there again sooner or later, maybe I’ll post my contribution to the set here later. Here’s a somewhat trickier Checkered Fillomino that didn’t make it. I’m not sure it’s right to tag it as hard, that depends a lot on how well you know the type. 
This variation was introduced by Nikolai Beluhov at Puzzled by Titles, see the authoritative rules and two very tricky puzzles: Fillomino 6: Checkered, Fillomino 8: Checkered. Here’s something that’s hopefully both correct and a little more approachable.
Rules (brief): Solve as a standard Fillomino, and shade some resulting polyominoes, such that no two shaded or unshaded polyominoes share an edge.
Maybe Puzzles 