8queens
x64 assembler solution to n-queens problem. Especially if n happens to be 8.
bash-3.2$ git clone https://github.com/davidad/8queens.git
Cloning into '8queens'...
Somewhat surprisingly, the very first time I tried to run this code, it successfully returned 92. (Though it did take me about 3 hours of thinking and plenty of referencing the Intel 64 manual before I could write it at all.) It took another 4 or 5 hours to get the pretty printing this pretty.