Puzzle Pack Vol. IV: Fillomino-fillia 2

At long last, the fourth puzzle pack, albeit several months later than I wanted. As this is a companion to the Fillomino-fillia 2 test and serves as its solution booklet, this pack is coauthored with mathgrant, who actually wrote more of the puzzles than I did.

If you did all of the Fillomino-fillia 2 puzzles on the test and preview series, don’t pass over this. You have only done 26 Fillominos in all. This pack has 56 total puzzles, so you’re not even half done.

Download the pack (PDF; 1863 KB)

This pack contains

  • The rules and a walkthrough for an example for Fillomino
  • 9 puzzles using the standard rules, including a large 20 by 36 brought to you by mathgrant
  • 10 puzzles representing all variations from Fillomino-fillia 1
  • 4 puzzles of each of the six variations from Fillomino-fillia 2: one easier 7 by 7, the two test puzzles, and the preview
  • 4 additional Fillomino-fillia 2 rejects: a Liar, a Snake, and two No-rectangles
  • 4 puzzles representing 3 new variations, which may appear on a tentative test for next year that might be called Fillomino-fillia 3
  • 4 chimera puzzles combining other variations in the pack
  • A fifth chimera puzzle: the FF2 version of last year’s Potpourri
  • Hints and solutions for all puzzles

Reporting of errors can be done by comments here or by email.

There will probably not even be progress on Volume V until 2013, as there are Mystery Hunt things to be done.

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21 Responses to “Puzzle Pack Vol. IV: Fillomino-fillia 2”

  1. mathgrant Says:

    Can we try replacing the collars with just the ID tag (the “1-up” logo from my blog” and see if that’s more recognizable at the small size? Maybe upload a test page with collars on one puzzle and logos on another so I can print and compare them?

  2. chaotic_iak Says:

    Just to make sure:
    Does IV56 really not contain any snake segment given? What’s the minimum length of the snake then?

  3. Minfang Lin Says:

    The starting of IV.8 is pretty good!

  4. ksun48 Says:

    The ending of IV.9 is pretty good!

  5. MellowMelon Says:

    mathgrant and I would hope that all of the puzzles have their “pretty good” moments. =)

    • GLmathgrant Says:

      I agree with Palmer, and hope that every puzzle, even the easiest beginner puzzles, has something enjoyable in it to justify having made it.

      That being said, I was really hoping to get specific praise for IV.9. Glad that the initial impressions are good. 🙂

      On Wed, Nov 14, 2012 at 9:41 PM, Melon’s Puzzles wrote:

      > ** > MellowMelon commented: “mathgrant and I would hope that all of the > puzzles have their “pretty good” moments. :)” >

  6. chaotic_iak Says:

    Hm… I note that Packs 1 and 3 have the solution visible before the walkthroughs, but Packs 2 and 4 have the solution present as the final step of the walkthrough. I prefer that solvers know the solution first so they can observe how the rules take effect before going to the walkthrough.

    Just a random rambling though.

  7. Minfang Lin Says:

    I wrote the steps of IV.8 here (http://www.sudokufans.org.cn/forums/index.php?showtopic=920)

    • MellowMelon Says:

      It looks really nice. Thanks for doing that.

      In the initial step with the 3s, you can also determine that each pair of spaces between adjacent 3s on the edge contains one 3 and one non-3, so you can draw a wall between all 12 of these pairs. This makes the step where you try to extend the 5s toward the center easier to see.

  8. Anuraag Sahay Says:

    Minfang and ksun: You didnt leave anything between IV.8 and IV.9.Or i d ve commented that IV.x had a pretty good flow in the middle of the solve.

    • linminfang Says:

      Hmm, my English is poor, so I will write more comments in Chinese. Anyway, I should say I like the middle steps of IV.16 and IV.14.

  9. Prasanna Seshadri Says:

    I really really like the LITS Fillomino idea. I really like how you/Mathgrant let big numbers play in elegantly into your Fillominos with the latest example of this being the Sentry Fillomino idea with the 2 18s. Only the 20×36 and Potpourri 2 left I think. Its been a treat!

  10. ksun48 Says:

    18, 47, 55, and Potpourri left! 18 is too challenging due to it being a Pentomino-ish puzzle. Can I have a hint after the placement of XIY?

    • MellowMelon Says:

      Not a Statue Park fan, huh?

      The logical solution I had in mind involved finding regions that could have at most one pentomino in them. For example, if you draw a “boundary” (not a Fillomino boundary) between R4C4 and R5C4, you should cut off a region of ten empty cells, and you should be able to determine this region can have one pentomino and not even a single cell of a second one for things to fit. Now keep moving through the puzzle drawing similar boundaries, and you should be very short on space by the end.

      • ksun48 Says:

        I’m still really confused. (Yes, I’m not a huge Statue Park fan) I’m getting that there is space for 6 other pentominoes: Upper left 6-region, lower right 5-region, upper left 10- region you’re talking about, the middle star thingy, and 2 in the remaining space. I can’t really figure out which one works.

      • MellowMelon Says:

        Good so far. Now why can’t the far upper left and far lower right both have shapes in them?

      • ksun48 Says:

        Ah, yummy.

  11. Giovanni P. Says:

    I think I spotted an error in the hint for IV.22. Should it read that R6C4 would leave too little room if it DID have a snake piece in it, and not the other way around?

    Loving the pack so far; some very nice variations. IV.56 looks like it may take a while, even with the starting hint.

  12. nicke Says:

    Loved the whole pack especially 56 which at the outset looked impossible

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