Puzzle 85: Loose Strands

Pure Loop Loop: Draw a loop that passes all white cells and no black cell such that the loop goes horizontally or vertically at all times and never touches or crosses itself.

Expected difficulty HardAnswerComment/E-mail if you want a solution to be published

Puzzle 85: Pure Loop

Puzzle 85: Loose Strands
Pure Loop

There we go, the last of the series. Of course, the blog is turned off again for the moment, at least until I manage to construct more puzzles. I’m busy too, you know. (By the way, expect things.) Answer key would be “lengths of horizontal segments in row/vertical segments in column” for R1/C2 (or R2/C1 or something).

Another difficult “opening”. Also for some reason I find sudden interest on Pure Loop and Heteromino now, like exploring two untouched lands… (Okay, I think I see it being used in more things now, but still.) Did you know that Heteromino almost got into FAST (as an uninteresting 3×3), but Deb decided it was too obscure and got replaced with Kakuro, which in turn also got replaced by Next Term? The more you know.

Did I ever say my computer broke like a month or two ago?

I think I forgot to say that here. To be precise, it started from like late January to February; fixed it by buying a new hard disk altogether on 21 February, thus having all my data lost. This includes a good amount of my puzzle images (I still work with Excel, yes, and that single worksheet went away), a good amount of Word documents (I usually have my PDFs published elsewhere, but without the Word it’s going to be some pain to rewrite them in case I want to edit–I’m too perfectionist sometimes), and other things.

Lesson: Back up.

Meanwhile, I’ll point you at this insanity. I haven’t matched that in terms of presentation (although I think I made a couple of insane variants, trying to match other works). Sooo… We’ll see if I have time to squeeze out something. Hey, I’m busy with college life + a future LMI test + Mystery Hunt + [insert other things here]…

Puzzle 84: Chopsticks

Hashiwokakero Draw some bridges connecting the islands (circles). Bridges can only run horizontally or vertically, and all islands must be connected (it must be possible to visit any island by using the bridges). Bridges cannot cross each other. Between any two islands, there may be at most two direct bridges connecting them. A number on an island gives the number of bridges connected to that island.

Expected difficulty HardAnswerComment/E-mail if you want a solution to be published

Puzzle 84: Hashiwokakero

Puzzle 84: Chopsticks
Hashiwokakero

Because “hashi” can mean “chopsticks”. Fourth of the rejected series for FAST. The answer key would be “write 1 for every single bridge and 2 for every double bridge that crosses/goes along the marked rows”, with the two bottom rows as marked.

This is probably hard because you need to observe for the opening, a bit like the dreaded Hitori. Afterwards, I’d put it no more than a medium. And I hate making Hashi’s solution image; just check that answer when you’re done or something and guess how I made it.

Puzzle 83: Division

Star Battle Put two stars in each row, column, and region bounded by bold borders. A star occupies a cell, and no two stars are adjacent.

Expected difficulty MediumAnswerComment/E-mail if you want a solution to be published

Puzzle 83: Star Battle

Puzzle 83: Division
Star Battle

Third in the reject series. There was Star Battle in the original draft of the puzzle, and it’s not that trivial to solve the second part. (Of course, the answer key would be “enter the column number of the leftmost star in each row”.)

Also, apparently I start to construct puzzles on my computer too, instead of using my book again. This is what happens if you have too much access to computer. (Compare: a year ago I’m still at school, without computer access, hence why I use the book to store my puzzles.)

Puzzle 82: 5×10

Heyawake Dynasty-style: Shade some cells black so that no two black cells are orthogonally adjacent and all white cells are connected. A number inside a black bordered region—a room—indicates the number of black cells in the room. A run of contiguous white cells in the same row/column cannot span over two room boundaries.

Expected difficulty HardAnswerComment/E-mail if you want a solution to be published

Puzzle 82: Heyawake

Puzzle 82: 5×10
Heyawake

Second rejected puzzle. As you can guess, some of the top rows would have become the answer keys, and the bottom part I still can’t figure out a logical solution for.

Three more to come. Also the ordering of how these puzzles appear is determined indirectly by Yoshiap, whose I simply asked “give a permutation of 1,2,3,4,5″. :P

Puzzle 81: Fell from the Sky

Skyscrapers Latin square: Put a number between 1 and 7 into each cell inclusive such that each row and column contains exactly one instance of each number. If we consider the numbers as heights of buildings, each number outside the grid tells the number of buildings visible from that point, looking into the grid. For example, an observer to the left of the sequence 1426375 sees four buildings (1,4,6,7; other buildings are hidden by taller buildings to the left).

Expected difficulty MediumAnswerComment/E-mail if you want a solution to be published

Puzzle 81: Skyscrapers

Puzzle 81: Fell from the Sky
Skyscrapers

This is the first in the series of the rejected puzzles for FAST, a joke test for April Fools Day. As described in a post in the discussion thread, my initial idea was “normal-sized” puzzles (even though I actually had 12×12′s and not 10×10′s), but with answer keys that are trivial to obtain. This, in some cases, lend to actually trivial puzzles too, but I don’t really like that, and hence here’s a handpicked collection of puzzles that I deem to be interesting enough even with the trivial answer key restriction. (Thus the title follows; the puzzles are those that “fell from the sky”, failed to be picked for the party.)

From The Archives 001: Symmetric–

This puzzle originally appeared in Deception, as the Bottom puzzle of Elimination Tapa.

Elimination Tapa Nurikabe-style: Shade some of the cells black. Black cells must be connected, but no 2×2 square may be all black. Cells containing numbers may not be shaded black. A cell with numbers represents the lengths of contiguous black cells in the cells adjacent to itself, separated by at least one white cell between different groups.

In addition, each square with numbers has one extra number. Removing extra numbers is part of the puzzle. Question marks indicate unknown numbers.

Expected difficulty HardAnswerComment/E-mail if you want a solution to be published

From The Archives 001: Elimination Tapa

From The Archives 001: Symmetric–
Elimination Tapa

Clearly intended to be a standalone post for this.

Yeah, reposting puzzles I’ve published somewhere else. This includes my old blog.

Also, yay, managed to disable anti-aliasing with a program!