Show HN: Daily Unfold – A paper folding puzzle game(dailyunfold.com)

6 pointsby astralasiahace 4 meses2 comments

Show HN: Daily Unfold – A paper folding puzzle game

https://www.dailyunfold.com/

I built a daily puzzle where a piece of paper is folded and hole-punched, and you predict where all the holes end up when it's unfolded. It's the kind of thing I used to do in grade school with actual paper and scissors, and it turns out the mental version is a surprisingly good spatial reasoning challenge.

Three difficulties each day: easy is a 4×4 grid with one fold, hard is 6×6 with three folds.

It's built with Next.js. The puzzles are generated deterministically on the fly using a daily seed.

The engine runs a forward simulation of the paper folds using 2D coordinate mirroring, then calculates a "cognitive difficulty score." It weights factors that mess with human spatial reasoning, like off-center folds that break obvious symmetry and mixed-axis folding. It then automatically rerolls the daily seed until the easy, medium and hard puzzles form a good difficulty curve.

Would love to hear your feedback!

3 comments

vunderbahace 4 meses

Nice job. Back when “brain training games” (like Brain Age and Lumosity) were all the rage, there were similar spatial-practice games that used unfolding mechanics such as opening and closing a suitcase and visualizing how the items would be arranged in each of the two halves.

astralasiahace 4 meses

Thanks for playing, glad you enjoyed it.

ababu6hace 4 meses