Well, in the game being used as an example here, Iamsan didn't even fully explore his zone. And if the zone is already fully explored, but the player hasn't realized that they have no way forward... which rule applies to this? There's a rule like this: "1.4. Restart at the player's request if the only path leads to the GO," where the restart is taken on the day the issue is discovered, but no later than day 115! I don't see any other rules that suggest you can take a restart because you have no way forward on the second day.