I mentioned this issue in my writeup. The competitors were obviously incentivized to target the provided hashes. I haven't done any testing myself, but if this is true I am not surprised at all.
Never really understood the best64 obsession anyway. 64 is a small number, and you should customize your attack to each target.
Never really understood the best64 obsession anyway. 64 is a small number, and you should customize your attack to each target.