I sure seems very fast. I'm just wondering if you know anything about how fast it would be on a worst-case NxN board? When you write 'sub exponential', do you mean that literally? Or do you just mean that it seems fast?
Hi. Sorry for the late reply: I do not check often this account. Feel free to contact me via the contact page (where my email address is displayed) on my website to ask me any question!
