Digital version of the asymptote perplexing puzzle. I've gone through the effort completely digitizing this puzzle and giving some cool little helper functions to check and draw your solutions. So all that's left is the fun of solving the puzzle!
I will send a fun little puzzle gift to the first person to send me an email with solution code. harald.the.engineer@gmail.com
See the examples notebook to see use of the helpers. But most importantly there are functions to draw the grids as seen below!