### Yajilin by David Altizio

PDF

or solve online (using our beta test of Penpa-Edit tools using a composite mode where left click inside cell shades square, left click + drag draws line segment, right click inside cell adds dot, and right click on cell edge adds an x.)

Theme: 4×4 Grid

Author/Opus: This is the 11th puzzle from guest contributor David Altizio.

Rules: Standard Yajilin rules.

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 7:00, Master = 9:45, Expert = 19:30

Solution: PDF and solving video.

Note: Follow this link for classic Yajilin and this link for Yajilin variations. If you are new to this puzzle type, here are our easiest Yajilin to get started on. More Yajilin puzzles can be found in The Art of Puzzles 2, in Yajilin by Murat Can Tonta and Prasanna Seshadri, and in our beginner-friendly book Logic Puzzles 101.

• David says:

Two puzzles this week I’ve ended up in FUBAR territory. Can’t wait for the Stumper.

Bit of an odd Penpa question I can’t find an answer for anywhere, but is it possible to change one’s own default user settings so puzzles display as preferred as soon as they’re opened? I was considering trying to record a few solution videos of my own but while it does seem to remember that I want to use the beta streaming layout, it doesn’t seem to remember that I change the display theme to dark mode or resize the grids.

• Swaroop Guggilam says:

@David Thanks for the question. I will try to answer in two steps.
1. Display Size – I believe that the display size varies with the puzzle size, so the author’s choice is given higher priority. The way it works is, Let’s say you open Puzzle A, and change its size, next time you open Puzzle A, it should remember its new size value. However, then you open Puzzle B for the first time, and it will open with the Author’s choice.
2. Dark Mode – I think currently, the streaming layout choice is saved dynamically, whereas the theme choice (dark mode) is not. I will see to change it in a future update.

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