Sunday Stumper: Castle Wall by Stefan Liew

Since 2021, we have posted some extra difficult Sunday Stumpers, about once a month. These will be quite tough puzzles, but with a logical path to be found (and solution videos to help). This thirteenth Sunday Stumper of 2022 is an unusual Castle Wall puzzle by Stefan Liew where all the clues are on the “Outside”.

Castle Wall by Stefan Liew


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: Outside

Author/Opus: This is the 3rd puzzle from guest contributor Stefan Liew.

Rules: Standard Castle Wall rules.

Difficulty: 5 stars

Time Standards (highlight to view): Grandmaster = 11:00, Master = 22:30, Expert = 45:00

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.

  • Peter says:

    SPOILER ALERT. (Edited to use rot13) Vg gheaf bhg gb or fhecevfvatyl rnfl nsgre lbh abgvpr ubj gur gbgny ahzore bs ybbc’f rqtrf eryngrf gb gur obeqre’f yratgu – guvf nyybjf gb hanzovthbhfyl qrgrezvar gur qverpgvba va juvpu gur ybbc unf gb ghea. Nsgre abgvpvat gung vg gbbx zr yrff guna 4 zvahgrf gb fbyir vg, rira gubhtu V uneqyl rire ernpu gur ‘Rkcreg’ gvzr.

  • Julius Jacobsen says:

    Brilliant theme that I did not get on my own. This is the first time I pressed the Fave button bot not the Solved button.

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