Tag Archives: counter

Counter-Red Spiders

An entry in Fortnightly Topic Challenge #35: Restricted Title 1. Title based on this xkcd.

This puzzle contains hints for 220 black squares (but that’s not the point) but is a standalone puzzle.

The counter-red-spider offensive begins…

We need your help to mount the counter-offensive against the red spiders. The following blueprints just came from mission control.

I hope we can stop them

It looks like they’re encrypted somehow, but it doesn’t appear that difficult; everything appears to be ready to begin construction. Those rules seem a bit fishy to me, but I’m sure it’s nothing you can’t handle.

(I just hope those spiders didn’t muck with the plans. If they did, things could get a bit… complicated).

Hint:

Hint: