Some combinations of constraints are difficult for people with colorblindness. So there’s a version of this puzzle as I initially intended it, but a friend with deuteranopia very patiently reviewed more than a half-dozen different attempts to ensure the pink and green cages were easily distinguishable, and this is the version that was clearest for him. So it’s the official version.
I’ve made a few references to 67 in puzzles, including just a couple of puzzles ago. I’m doing it again. 67 67 67. Why not? Sometimes you see a waveform-like shape and a need for a couple of given digits, so why pick them at random when 67 are right there? Note: This is puzzle 100 for 2026, numbered as I created them.
I don’t think of fog as something that echoes. If an empty room filled with fog, I think shouting would end up swallowed, the sound absorbed and reflected by the fog rather than bouncing off far walls. I don’t actually know, and if I looked for answers on the internet, what would I write about here? If you know the answer, shout it into the void, and perhaps it will reach me.
The challenges in creating these larger puzzles are multiple. I could have created more than four single-grid puzzles in less time than it took to create this one, in part because each change required me to re-solve the puzzle from the start, to be sure I hadn’t broken anything unexpectedly. Still, the satisfaction of a working gattai that also follows the rules I’ve set for myself, it’s worth spending the extra time on one out of every dozen puzzles or so.
There’s a big green rectangle with some weird edges, and it anchors the grid. But there’s this weird rotating line careening wildly across the grid, with very different properties than the rectangle. It grabs a couple of points, but mostly takes its own path. Oh, and also a switch of sorts, a single black dot. I think of it as a circuit, with the peach line representing temporary wiring. But I’ve used that metaphor when naming other puzzles, so it’s time to pick names differently. Note: Some testers considered this a 1 or 1.5 difficulty, while others rated it 2.5 at least!
Some lines force digits to be far apart, while other lines force them to be close together. They only interact at a single point.
More of these combo cages that act as “German Whispers” lines. In this case, some of them are square, and adjacent digits means orthogonally-adjacent, since there’s no way a square would work otherwise. For extra fun, very few of the cages have totals.
These cages are the color of “German Whispers” lines as a reminder that each cage functions as just such a line. Even the two-cell cages function as if they were two-cell green lines. Imagine that they’re green lines, but I’ve helpfully provided the total for all of the digits along the line.
There are eight L shapes in this puzzle. No, I didn’t forget the green ones: two of the peach ones aren’t L-shaped. There are ten lines bent into right angles, but two are bent in a different direction from the others. And I don’t care what anyone says, it’s not an L if the horizontal bit is longer than the vertical bit!
Irish pub cuisine, or a Gattai-3 Sudoku puzzle? You decide!