OOC: Just to clarify what was said in the OOC thread, the large ant queen is at 55N5E, which means she covers the squares 55N5E, 60N5E, 55N10E, & 60N10E. The centaur is also large and would need to squeeze in order to take the action you propose.
OK, the move has been edited.
The longsword misses! (Rolled 10)
The ant turns wildly and eats dirt! (Rolled natural 1)