Here's another Thud! endgame solution. Eight carefully arranged trolls trap the lone remaining dwarf in one of the free spacespic.twitter.com/OKjmPTx7jv
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If the dwarf is in one of the four lone spaces, they have free movement between those four spaces but can't reach any of the others.
In this case, move the top right or bottom left troll to block one of the two exits, forcing the dwarf to the other.
You can then do the same with the troll at the other end of the board, leaving the dwarf with no reachable unattacked spaces.
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