"This post recaps some of the C64 coding tricks used in my little Commodore 64 coding competition. The competition rules were simple: make a C64 executable (PRG) that draws two lines to form the below image. The objective was to do this in as few bytes as possible."
And some of the dirty tricks are very dirty indeed!
The article got posted to Hacker News today and also in 2019. The resulting discussions can be viewed here and here.
-- Jeff