From the Foxger’s Den #61: Pentominous
or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between a composite mode for line/edge drawing and a letter entry mode.)
Theme: Logical
Rules: Variation of Fillomino rules where regions with the same shape must avoid each other instead of regions with the same size (all regions in a pentominous puzzle are pentominoes). See an earlier Pentominous puzzle here.
Specifically, divide the grid into 45 pentominoes so that no two pentominoes of the same shape (including rotations/reflections) share an edge. A cell with a letter in it must be part of the pentomino shape normally associated with that letter as given below the grid. Not all pentomino shapes need appear.
Answer String: Enter the letter associated with the pentomino occupying each cell in the marked rows from left to right, separating the rows with a comma. Use CAPITAL LETTERS!
Time Standards (highlight to view): Grandmaster = 6:30, Master = 10:30, Expert = 21:00
Solution: PDF
Note: Follow this link for other puzzles involving Pentominoes.
It’s been bugging me for a while – so I have to ask – what does the theme “logical” mean? Are the puzzles that don’t have that theme illogical? Or does logical = themeless? (Nothing wrong with themeless…)
I tend to view puzzles as having either a visual aesthetic theme, or a logical aesthetic theme, or both. When a puzzle’s main focus is on the steps of the solve, it gets the label “Logical”. Themeless isn’t exactly right in my mind, but I can understand why another reasonable person might deem that appropriate.
I should admit that I am often trying to title other author’s puzzles and not everyone designs things exactly as I do (or even submits puzzles with titles). “Logical” is a bit of a catch all, particularly with variants like this, but usually a new puzzle style is being explored for its solving properties first before it is made visually elegant.
I feel like the answer string for this type is especially cumbersome (as I don’t know which pentominoes correspond to which letters without checking.) Is there anything wrong with just the lengths in that row?
Understood as a concern. Asking for letters does have an effect at checking nearby rows (the kinds of mistakes a solver will make will not always affect lengths in one row but will affect identity in that row and nearby rows. We haven’t hosted this puzzle enough times that I’ve thought a lot about the best format.
seems multi solutions.
row9-14,column13-15,the last two pentos could be IF or LP
There is an I clue in R14C15, so you can’t swap those cells to LP.
sorry, my pencil mark covered the clue, so I forget it;)
Puzzle link [EDIT: Removed as we added our own official link to post]