  A recent 3-XORSAT challenge required to minimize a very complex and rough
energy function, typical of glassy models with a random first order transition
and a golf course like energy landscape. We present the ideas beyond the
quasi-greedy algorithm and its very efficient implementation on GPUs that are
allowing us to rank first in such a competition. We suggest a better protocol
to compare algorithmic performances and we also provide analytical predictions
about the exponential growth of the times to find the solution in terms of
free-energy barriers.
