The mysterious origins of an uncrackable video game (bbc.com)

There’s further discussion about the game here:

https://www.reddit.com/r/todayilearned/comments/h7yw17/til_a...

Better link with explanation (Decision matrix) https://www.reddit.com/r/math/comments/d8bgbu/a_mysterious_m...

Needs a (2019) tag. The Entombed story has previously been discussed on HN (the last time was yesterday).

https://news.ycombinator.com/item?id=23507453