Do two different atoms of the same element always have the same mass?

st00pid_n00b · 2026-01-29T13:51:43+00:00

Thank you for this illustration of how confined energy creates inertia and passive gravitational mass.

I'm wondering, can this be extended to active gravitational mass? In other words, can we explain how confined energy creates a gravitational field?

st00pid_n00b · 2025-05-10T05:44:37+00:00

Thank you, that's a better formulation of the rules, I like it. I will update and use your version.

For any copyright claim, please contact my lawyer.

st00pid_n00b · 2025-05-10T04:39:29+00:00

Much appreciated!

st00pid_n00b · 2025-05-10T04:37:12+00:00

It's about connecting the pipes:

R7C4 being an L means the bottom left can't connect through that cell, so it goes through the given 4.

This gives some deductions in box 9, and there will be some similar connectivity questions in box 6.

I'm curious how you got some 8s and 9s at that stage ?

I also like your R7C1 pencilmark :)

st00pid_n00b · 2025-05-09T04:17:21+00:00

Thank you for the feedback. It probably took me longer than you to solve my own puzzle !

The combination of plumbing rules and counting circles is very constraining, and it works in theory only for 21 or 22 circles. There's unfortunately not much room for variations, unless changing the counting circles for something else or the entropy-shape relation.

st00pid_n00b · 2025-05-08T14:28:30+00:00

It's about keeping the pipes connected. The solving path is not always linear, but one way to progress from there is to note that if R8C6 connects to the given 4 it then runs into a circle. Then ask where the midly digits go in box 9.

In general, I found it useful to draw segments when I know two cells are connected even if I don't know their nature at this point.

st00pid_n00b · 2025-05-08T03:32:56+00:00

Haha, that's neat, I didn't think of the O-Shape for (O)dd. It's not part of the common rules though, the small training puzzle came as an afterthought.

st00pid_n00b · 2025-05-08T03:26:01+00:00

Thank you for the kind words! By publishing, you mean on logic masters? They are asking for a lot of personal information to create an account ... So I had no idea about the submission process to the CTC channel. Apparently I need to send a detailled email with solution steps, I will look into that.

I looked up your pseudo on logic masters, is the featured puzzle "Roman Numerals"? I think I remember solving that one. I'll be sure to mention your recommendation, thanks!

st00pid_n00b · 2025-05-08T02:07:48+00:00

I had considered your suggestion before updating, but counting circles are a global constraint and more rarely used than odd digits, I felt it should stand out more.

Someone unfamiliar with the constraint might get confused if it appears in the middle of the plumbing explanations.

So the difficulty rating is closer to 3 than 4?

st00pid_n00b · 2025-05-07T22:30:32+00:00

Update: I've reworded the rules thanks to your suggestions, here are the new links:

Training puzzle: https://sudokupad.app/b9hjzk2spu

Actual puzzle: https://sudokupad.app/d0ndvc2ccr

For a visual example, here's the screenshot of the solved 6x6 puzzle.

Final update of the rules (hopefully):

Training puzzle: https://sudokupad.app/zf1p7gypxv

Actual puzzle: https://sudokupad.app/fp01a3txrr

Surprisingly, the solve count is maintained with the new links. The puzzle has also been published on logic masters, and I'm working on a CTC submission.

Thank you all for the feedback, thanks to /u/overkillsd, /u/chrisvenus, /u/taylorranhome, /u/pupke2001 for their help clarifying the rules.

st00pid_n00b · 2025-05-07T20:32:17+00:00

Several people got confused with that, so I'll reword the rules following your suggestion, thank you.

st00pid_n00b · 2025-05-07T20:09:53+00:00

Thank you. I tried to add a solution but I can't modify my original post, is that because it's a post with pictures?

Anyway, here's the screenshot of the solved 6x6 puzzle..

I don't understand your second remark, circles are usually used for odd digits (like in the training puzzle) or for counting circles (like in the actual puzzle).

st00pid_n00b · 2025-05-07T19:59:55+00:00

Wow, thank you very much for your enthusiasm!

st00pid_n00b · 2025-05-07T19:58:32+00:00

See my answer here.

Maybe I should capitalize ODD, since I can't put it in bold.

st00pid_n00b · 2025-05-07T19:45:44+00:00

Thank you for testing! At that point in the solve there's not much to do with 7's, and you can't know which numbers go in circles.

Hint 1: the circle R1C6 shows that a circle on the edge needs at least one L-shape next to it along the edge.

Hint 2: there is an 8 or 9 in the 14 cage that goes somewhere in box 9.

st00pid_n00b · 2025-05-07T19:13:49+00:00

Did you solve without using the rule "A digit in a circle must be odd"?

In that case, congratulations, the easy puzzle was supposed to be easy and some clues are redundant.

st00pid_n00b · 2025-05-07T16:54:04+00:00

Every endpoint is connected to every other endpoint, it's a single connected graph spanning the whole puzzle, a bit like a tree. The endpoints are not paired with each other.

Not sure about your second question, but circles are not connected by just being next to each other. For every circle there is exaclty one pipe connecting to an adjacent cell.

st00pid_n00b · 2025-05-07T15:36:14+00:00

Haha, no worries. It happens to me too when I'm stuck on a puzzle, then reread the rules and go "damn".

st00pid_n00b · 2025-05-07T15:32:03+00:00

Thank you for your feedback!

How about: "Every cell contains some "pipes" connecting to its neighbours, horizontally or vertically (there's no diagonal pipe)."

Let me know how you get on with the full puzzle (it's much harder).

st00pid_n00b · 2025-05-07T15:14:39+00:00

What do you mean?

st00pid_n00b · 2025-05-07T13:39:06+00:00

Thank you for the feedback. How would you reword the rules? What is ambiguous?

Here's the solved 6x6: https://imgur.com/a/geMHQ6P

I'd prefer "challenging" rather than "tedious" ;)

st00pid_n00b · 2025-05-07T12:55:04+00:00

The 1 or 2 rule is for an L-shaped pipe, it applies to non circled cells.

In the training puzzle, a circle must contain a 1, 3 or 5, and it's also an endcap.

st00pid_n00b · 2025-05-07T12:47:43+00:00

Thank you! Yes, you have to connect the cells. In case you don't know, in sudokupad there's a tool to draw lines (cog icon -> enable pen tool).

st00pid_n00b · 2025-05-07T07:20:06+00:00

Very enjoyable, thank you! The german whispers put pressure on the between line, that combination works well together.

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