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I was just testing Beltway; at first, I managed to complete it in 6 turns, then in 5. It's very difficult to do in 4 days; the chains are long, and I would have to try very hard, and even then, it might not work. I just used 2 heroes going in one direction and 2 in the other. The warrior fights, and the mage provides support.
I looked at the Hotspot map again in the Editor, but I can't come up with any ideas.
And I don't have time. What about you on Monday?