Locked parts are not locked in latest puzzle

Started by Sidran

Sidran Lv 1

Picture says it all. I noticed that sometimes "locked" parts move relative to each other.
I saw this 3-4 times on a single puzzle but only this time actual clashes appeared.

Rav3n_pl Lv 1

Locked parts are moving when wiggle and there is some big clash.
Also strong bands can pull/push locked parts when wiggle.

spmm Lv 1

They have alwasy moved for me :-) - since October 2010 I put bands on sheets to see the effect it has on the score

Sidran Lv 1

Yes, it is somehow connected to usage of bands.
But I wouldnt stop investigation there.
I cannot say it is only with bands. I am not looking
at locked parts when working.

CharlieFortsConscience Lv 1

I'm not sure of the issue here, it may not be a bug, but may be news to FoldCentral - greyed out 'locked' backbones will always move and shift with a band approach, when there are any predefined gaps in the grey backbone, even when constraints are imposed. The only way to lock movement in the grey backbone puzzles is to fix them in formaldehyde, and have a continuous structure, so it's like concrete. Free chains can then dance, if that's the wish of a puzzle.

tldr; constraints arent as powerful in fixing grey backbone puzzles as they want to be

CFC

Rav3n_pl Lv 1

Locked parts are moving when are really NOT do that.
In puzzle 399 cant use any LWS because entire thing is floating around.
Look at this screen:

Made short script to catch this.
Wiggling locally one segment (316) and testing distance on "other side" (311-312).
IT IS CHANGING during LWS even if 315 and 317 are frozen.
Also score drops rapidly because of constrains.
IMO this shound not have place in any puzzle…

Sidran Lv 1

Frequently, its visually obvious that fixed parts move just a bit (observing them while doing operations pretty unrelated to them). Lately, I observed such moves without ever using bands.

This numeric example of yours could be another way to show that something deeper inside is not working as it should.

Its fascinating how long such a critical issue takes for resolution. Either we could be wrong and would be given explanation why (case closed) or whole case would not be still "open" hanging in the air.

beta_helix Staff Lv 1

This should be fixed from now on, please let us know if it happens again.

Thanks for being so patient with this.

Sidran Lv 1

This time its 402: Design the interface 8

Luckily, I know exactly what I done as it happened on a very beginning.

Started puzzle, wiggle, reset puzzle, added 3 backbones, wiggle, removed 1 backbone and left it on wiggle while I was watching some documentary. Screenshot is showing what I encountered when I switched back. Not just that "locked" parts moved a little and created clashes, but that locked part connecting locked chunks with modifiable one got strangely prolonged (as seen on ss).

From the very start there were no bands (outside those two imposed by puzzle), behavior changing, rebuilds, mutate or anything else (not even shake).

In attachment is exactly the same situation from another angle.