Broken Sign Blog
#164: Toblerone Banana
23 April 2025More catching up: this puzzle won a 24-hour puzzle construction contest on the CtC Discord server back in November. The prompt was to make a puzzle on a triangle-shaped grid (not necessarily using triangular cells).
I believe the idea of generalising rectangular areas to convex areas on other grids was first used by Discord user blotwell. It seems a lot more interesting than just allowing hexagons or triangles for example. So I wanted to explore that variant for a while, and this contest gave me a good excuse to do so.
Rules: Shade some cells so that all areas of edge-connected shaded cells are convex and all areas of orthogonally connected unshaded cells are concave. A clue represents the size of its group of shaded/unshaded cells.
(A shape is convex if all of its internal angles are less than 180°, and concave otherwise.)