In the board game Thud!, how many trolls does it require to capture a lone dwarf? I can show a solution with nine. Can't quite get eight.
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Since the lone dwarf *must* move, it suffices to threaten the whole board except for one square...
Or, better yet, to threaten the entire board except for a network of squares, no two of which are connected by a dwarf's move.
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The fact that a troll, too, must be moved may complicate the actual procedure of assembling this trap.
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Anyway, here's one of several solutions I found using nine trolls. You can see why I think there's a solution for eight here somewherepic.twitter.com/OhCSUYKeyn
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