Logic Masters Deutschland e.V.

The Andromeda Chain (Spiral Galaxies, Lockout Lines)

(Eingestellt am 8. Februar 2022, 16:08 Uhr von Chilly)

This is a puzzle that I made for the unlocked puzzle pack. It highlights some of the more difficult logic of lockout lines sums, and combines with spiral galaxy Sudoku, which is a form I really like. Look out for the bonus solution video if you manage to solve. Enjoy.

The Andromeda Chain

by Chilly

The Rules:

  • Normal sudoku rules apply.
  • Lockout lines: digits in diamonds directly connected by a lockout line must differ by 4 or more. Digits on a line must fall outside the range defined by their diamonds.
  • Spiral galaxies: each circle gives the centre of rotation of a 180 deg rotationally symmetric 'spiral galaxy' lockout line. The sum of all the digits in the lockout line (including the endpoints) is given in the circle (and in certain cells in the corner too to help with visibility). The solver must determine how the lockout lines grow. Different lines must not meet or cross. The lines can grow orthoganally, but not diagonally and each has only two end points. Digits may not repeat on the same arm of a spiral galaxy, but may repeat on different arms and/or at the centre of rotation, if that is in the centre of a cell.

    The examples show in more detail how the rules work

  • The top right line is not correct because it repeats the 9s on the same spiral arm.
  • The line in box 8 is not 180 degrees rotationally symmetric.
  • The line in box 9 moves diagonally.
  • The numbers in the line in box 7 do not add to the total.
  • Note - three 1s are allowed in the top left line because there is one on each spiral arm and also one in the rotational centre.

Lösungscode: row 2 and column 8


Gelöst von PjotrV, marcmees, Raumplaner, LurkingFrog, PrimeWeasel, Manitary, DadJokes, Kafkapharnaum, zer0keefie, Myxo, chameleon, Bellsita, AnalyticalNinja
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Kommentare

Zuletzt geändert am 20. September 2022, 20:22 Uhr

am 20. September 2022, 19:19 Uhr von Kafkapharnaum
Everywhere I'm reminded of my solving shortcomings it seems XD Three stars? I'm siding with your testers on this one! I'd never done any lockout lines either though in my defense, so I kinda had to 'crashcourse' it through trial and error, and once that was done and I had the basics, it went mostly fine I guess :-)
I especially loved the way even the smaller ones came on their own, that was amazing. Congrats on setting that!

--Glad you liked it. Not an ideal puzzle for your first lockout lines solve for sure :) Thanks for the kind comments.

am 8. September 2022, 02:30 Uhr von DadJokes
This was my first Lock Out Lines puzzle. Pretty awesome. Thanks!

Zuletzt geändert am 11. Februar 2022, 14:33 Uhr

am 11. Februar 2022, 14:31 Uhr von PrimeWeasel
Very enjoyable! I rated it 3 because most of the deductions weren't all that complicated, they just took a while. Great fun though!

-- Thanks for the solve! - my testers thought 4* but if you've done a few like this it could be easier :)

am 9. Februar 2022, 10:15 Uhr von Raumplaner
Very rewarding and clever puzzle. Thanks Chilly.

Zuletzt geändert am 8. Februar 2022, 22:58 Uhr

am 8. Februar 2022, 22:37 Uhr von marcmees
nice galaxy puzzle. thanks.

--Glad you liked it.

am 8. Februar 2022, 18:43 Uhr von PjotrV
Very nice solve path, good usage of the combination Spiral Galaxy and Lockout Lines :)

Schwierigkeit:4
Bewertung:98 %
Gelöst:13 mal
Beobachtet:3 mal
ID:00092O

Variantenkombination Online-Solving-Tool

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