I gave up at "Mark all squares of the 64th floor of the Empire State Building"[1]. I had even spent an hour on the chess challenge, but that one looked tasteless if I wasn't missing a trick. I thought that I was supposed to try all the floors close to 64 (considering the topmost one below the tower was 86). I really didn't have the patience for that, especially the possibility of missing to mark an overflowing pixel line, etc.
Also, I hit a bug at the AI challenge which prevented me to pass it. So I had to spent at least 5-6 more tries to pass it.[2]
I reverse engineered what I could, and it's supposed to be all in row 30, column 4 to 11 (8 squares). You may add 2 more squares on the left or right side (it's just checking it's no more than 10 squares).
I'm glad that the programmer put some tolerance to it, but it was impossible for me to know whether he did or not at the time, and that was the end of fun for me :)
I googled an image found out how many floors it has and counted down from the top. worked on second try after I realized that many squares contain two floors
Also, I hit a bug at the AI challenge which prevented me to pass it. So I had to spent at least 5-6 more tries to pass it.[2]
Fun, but wouldn't go near it again :)
[1] https://bsky.app/profile/ssg.dev/post/3lz3gxm42jc2w
[2] https://bsky.app/profile/ssg.dev/post/3lz2o4mdrzc2l