Of course Simon Tatham’s puzzle collection includes this one. He calls it “rectangle”. You can configure the game to leave spaces around the numbers, which increases the difficulty. There’s a web based version here: https://www.chiark.greenend.org.uk/~sgtatham/puzzles/js/rect...

If you like these kind of games, there are millions of them at https://puzz.link/db/

There's a typo in the current title: Shiakaku -> Shikaku (Japanese for "square")

There’s a game on Apple Arcade called stitch if you want a much larger and more difficult version of this.

#ShikakuOfTheDay #EASY240413 02:39.21 #MEDIUM240413 04:40.83 #HARD240413 12:20.11 #EXPERT240413 58:44.96 https://shikakuofthe.day

I imagine master will take a couple of hours to complete, so I didn’t even attempt it.

This is great. Reminds me of the "Flow Free" game on the Apple App Store.

Thanks for sharing this, these are great for those 10 minutes break I set for myself between one task and another. Recently someone also shared a "Guess my RGB" game which serves equally well for this purpose

I don't understand how to make a rectangle of size 5.

It occurs to me that a decent strategy on the large boards is to look for larger primes, since they are likely to only work one way

A small puzzle game that I find to be a reasonable pastime. Author has also done rabble.se but that is only in Swedish.

Congratulations, this is a great nerd snipe.

How long before someone makes the AI for this?

Typo in title, should be “shikaku” (Japanese for quadrilateral).