### Castle Wall by Stefan Liew

PDF

or solve online (using our beta test of Penpa-Edit tools in linex mode where left click+drag draws lines and right click marks X’s)

Theme: Ones

Author/Opus: This is the 1st puzzle from guest contributor Stefan Liew.

Rules: Standard Castle Wall rules.

Difficulty: 1 star

Time Standards (highlight to view): Grandmaster = 0:25, Master = 0:45, Expert = 1:30

Solution: PDF and solving video.

Note: Follow this link for more Castle Wall puzzles. If you are new to this puzzle type, here are our easiest Castle Wall puzzles to get started on. More Castle Wall puzzles can be found in our beginner-friendly collection Intro to GMPuzzles as well as the larger collection Castle Wall, both by Serkan Yürekli.

• bert says:

Yay, almost Master time for me :D.
Also congrats to stef (assuming it’s him) for his first gm puzzle!

• desantoos says:

I tried to take a crack at this puzzle, since I like Yajlin, but I must admit that I couldn’t figure out the rules. I don’t quite get what precisely the arrow value means in these puzzles. The guide says they are “loop segments,” but I don’t get what that means.

• Giovanni P. says:

Basically, they are the unit segments from cell center to cell center. A loop segment between two squares would count as a 1 for the purposes of an arrow. You can also think of it as how many cell borders are crossed by the loop in the direction of the arrow, seeing all the way to the edge of the grid.

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