0
$\begingroup$

I am sure this puzzle has only one solution. Also the solver of this puzzle can put up a Yin Yang puzzle if they wish to start a series.

Rules of Yin-Yang:

  • Fill each empty cell with either a black circle or a white circle.
  • All white circles should be orthogonally connected, so should all black circles.
  • There may not be any 2x2 cell region consisting of the same circle color.

enter image description here

$\endgroup$
5
  • 4
    $\begingroup$ Why would you try to require any solver to make their own puzzle? That's both unenforceable and bad form - some people just want to solve puzzles, not create them. $\endgroup$ – bobble Nov 27 '20 at 4:09
  • $\begingroup$ Sorry I am trying to start a grid deduction series where solvers can post their own puzzles. $\endgroup$ – J.Spencer Nov 27 '20 at 4:12
  • 2
    $\begingroup$ You could try organizing a series in the main site chatroom, but we already have a puzzle-series thing going on - Chain Puzzles, which has its own chatroom for organizing. $\endgroup$ – bobble Nov 27 '20 at 4:14
  • 2
    $\begingroup$ If people want to write their own puzzles, they can; some logic puzzle genres catch on. (Tapa and Nurikabe have both caught on around here in the past!) There's no need to require that someone else put one up. $\endgroup$ – Deusovi Nov 27 '20 at 4:14
  • $\begingroup$ Sorry I did not phrase that rightly. I have changed it. $\endgroup$ – J.Spencer Nov 27 '20 at 4:19
4
$\begingroup$

There are two important facts that make Yin-Yang puzzles significantly easier:

The Checkerboard Rule: No 2×2 square can be a checkerboard pattern.
And the Border Rule: The border of the puzzle must contain only one 'section' of each color; that is, the border changes color at most twice.

To start:

The black dot on the left has to escape left. Use the Border Rule to get most of the border filled out:
enter image description here

Some connectivity, and application of both the "no 2×2" rule and "Checkerboard Rule" gets us here:

enter image description here

More of the same:

enter image description here

And applying those rules again finishes off the puzzle:

enter image description here

$\endgroup$
2
  • 1
    $\begingroup$ May I know how to get those rules? Can you elaborate? $\endgroup$ – 00xxqhxx00 Nov 27 '20 at 5:37
  • 4
    $\begingroup$ @00xxqhxx00 If you break either of those rules, you can't connect both white and black to each other: If there are two separate white sections on the edge, and you draw a line between them, then one black section is on the left and another is one the right. The same goes for a checkerboard pattern; no matter how you connect the whites, one black will be "inside" the loop formed and the other will be outside. $\endgroup$ – Deusovi Nov 27 '20 at 5:46

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.