[janekm]

Or, you could evaluate whether said program draws the crossed lines in an emulator. Might not take that much longer than calculating the hash... That makes this kind of an interesting "Genetic Programming" challenge... The solution space is "only" 29 bytes long...

[IcePic]

I don't think that would be this quick either. Since the code might/will mess up zeropage and/or other dataareas in use by the C64 basic, you would have to wipe it to a known state for each test, which almost means "boot up the KERNAL and let it run complete INIT".

Not that even this have to take a long while on a 3GHz computer running full speed, but doing it 2^272 times ...

[saagarjha]

> you would have to wipe it to a known state for each test, which almost means "boot up the KERNAL and let it run complete INIT"

FWIW, if I were actually doing this I’d run it in a emulator and “save” the initial state to restore for the every test.