I take it you weren't facing north when you got backed up. Because if you were, then you should have been able to deal with them... just sit at the bottom and turn west so they'll come one square closer, meaning that the front one gets blocked in and can be picked off. Repeat until there's one left and run that one to the wall. This works because the opening of that corridor is three away from you, so it's far enough from the sword that a goblin there is going to be more interested in coming at you which will block a lower one from being able to run away from the sword... you just need to move the sword out of the way so they'll all come in one square deeper.
I did the three goblins first, though:
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I got rid of the first goblin by heading straight north and running him into the wall. The second and third I dealt with by facing west getting them to move 2 north of the sword while directly against the wall (this requires a strategic pause to get them to come one square deeper to the key position). Rotating clockwise at this point leaves them nowhere to escape (they'll try for west, because they have a preference for northwesterly directions, but it really doesn't matter, they need to move north to get out of range, and the wall blocks all movement north).
[Last edited by bwross at 04-10-2014 05:32 AM]