GAS Sudoku Walkthrough - An Egg In This Trying Time by Bill Murphy (2024-05-29)

Philip solves Bill's "An Egg In This Trying Time", originally posted on May 29, 2024.
Rules:
Put the digits 1-9 in each box, row, column and shaded region. Digits in cages must sum to the given total.
Play on SudokuPad:
sudokupad.app/jja8xzzi2x
Visit sudokutheory.com/gas/ for more info, links, and our GAS Leak archive! (GAS Leak 39 for April 2024 is now available!)
Hat times and dino: 7:30/14:00/Resolute Rebbachisaurus

[@Pink-pj6oz]

I missed the obvious 123 in row 1 and 789 in row 9. Finally had to give up! Thanks for this!

[@fluffycritter]

Oof, I really struggled with this one and it took me 27:03. But at least I got there in the end.

[@kiminclw1664]

Thank you!

[@captainufo4587]

I finished it, but I reached a point where all the remaining cells were pencilmarked and I could not find a disambiguation logic except bifurcation.

[@brucejones533]

Two possibilities. Double check the cages, make sure all contain values which could sum to the desired values. Second, look for cage total combinations which make other cells impossible. That’s what got me unstuck. I’m by no means an expert or fast, but I am slowly improving and having fun. Hope that helps….

[@dwarfigplays9806]

8:26 and only 1 hat for me today. #1982

[@JohnLagrue]

I was sidetracked by the regions and spent ages on them. As a result I missed all the fancy bits in r1 and r9 and took over 45 minutes!

[@Kirbyfan87827]

Finished in 6:57 (two hats, dinosaur). Barely made the two hat time!

[@creativename3256]

5:45 for me

[@GianniBergandi]

4:36 for me, very cool !!!

[@fluffycritter]

With these fully rotationally-symmetric puzzles, isn’t it always going to be the case r5c5 will be 5? It feels like that deduction might as well be a free given.

[@GenuinelyApproachableSudoku]

It will be a digit, but I do switch it up depending on the constraints. It is 5 a lot. - Bill

[@fluffycritter]

@@GenuinelyApproachableSudoku What's an example of a rotationally-symmetric puzzle (with opposing number pairs, I should add) where the center digit isn't a 5? Like, if the constraints are set up such that a 1 will always oppose a 9, a 2 opposing an 8, etc., wouldn't the 5 always be in the center since that's the only place it can go?