Bingolfing

For this last years Binary Golf Grand Prix the goal was to: Create the smallest self-replicating file. Requirements: Produce exactly 1 copy of itself Name the copy “4” Not execute the copied file Print, return, or display the number 4 I sat down with some beer, as one does, and resolved that my personal twist on the challenge would be to not just do a single filetype, but a chain of obscure filetypes. I scripted out enumeration of all of the default file handlers for Windows 7 in a blog I titled Obscure Windows File Type.

For this years Binary Golf Grand Prix I started off by learning to fuzz properly, use a debugger properly, and various tooling. The objective was originally to hit all of the bonus points:

Let’s build the smallest WASM / GBA ROM / 7Zip polyglot in 584 bytes for the Binary Golf Grand Prix 2021.