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I looked at Alex_R.'s detailed save files.
Yes, it's clear that he didn't put enough effort into it; Sandro was constantly moving from side to side, never settling on a final route.
But I seem to have been lucky: I immediately chose the most successful route (you can see it in the save files).
Regarding the 10 days – it might have been possible to achieve that, but I didn't have time to replay; in the save files, you can see how Sandro was short by a few squares: first, to get the boots a day earlier, then to reach the Necropolis.
Regarding 9 days – it's quite possible; it's a shame that your colleague, DR28, couldn't participate in the tournament.
Is he planning to join us in the future? ;)
And among the participants who did play, unfortunately, not everyone had enough time (or sometimes the desire) to improve their result.
The described route is similar to mine, only I lost half of the first day defending the mines, and also correcting other mistakes, such as getting the boots earlier; perhaps that could have given us a result of 9 days.