I think this one should be harder than the previous puzzle, so I highly recommend solving that one first, or at least trying the example before solving this puzzle.
Rules
Standard Fillomino rules apply. Arrows indicate the distance between the first two borders seen in that direction (the grid border also counts for this). If there are multiple arrows in a cell, the number in the cell applies to each arrow individually.
Fillomino rules
Divide the grid in regions, such that no two regions of the same size touch orthogonally. Each cell contains a number that indicates the size of the polyomino it is in.
Example
Solve the example on Penpa
The puzzle
Solve on Penpa
Solution code: The two main diagonals. First from top left to bottom right. Then from top right to bottom left.
on 16. December 2023, 14:06 by kmoter
What a gem, thank you.
on 7. January 2023, 01:21 by Myxo
Amazing puzzle! Loved it :)
on 5. January 2023, 22:58 by SudokuExplorer
Really cool constraint with plenty of surprising deductions. Difficulty was very consistent and the logic was rewarding. Both Fillominos were really fun, thanks Mark! :-)
on 27. December 2022, 19:34 by PixelPlucker
Very fun one to think through, thanks!
on 22. December 2022, 14:03 by Christounet
A very nice sequel to #1, with some new things to dicover. There was some very interesting geometry at several steps, and I liked the fact that some deductions were left hanging with a missing clue that would come later in the solve path (at least the one I took !)
on 21. December 2022, 20:38 by marcmees
Very nice solve. enjoyed that immensely. thanks.
on 21. December 2022, 19:03 by Agent
Very nice puzzle, some really neat and precise deductions. I liked how the solution path went back and forth in different areas of the grid unexpectedly.
on 21. December 2022, 17:11 by polar
Super enjoyable puzzle - thanks :)
on 21. December 2022, 15:45 by KNT
Amazing and mind bending fillomino. Many thanks mark!
on 21. December 2022, 14:11 by Jesper
Wonderful, thanks!
on 21. December 2022, 14:07 by MagnusJosefsson
Fantastic! Beautiful and unpredictable solution path that delivers some nice surprises. Well done Mark!
on 21. December 2022, 11:44 by filuta
really great - both the constraint and the puzzle