Monstrous 3-1 Answer

As you can see from the Extremegammon rollout below, Red must hit.  And it's right to hit by a lot.  Seems obvious, doesn't it?  But when Magriel and KG set up this problem as a part of their "Monster Quiz" in the 70's they didn't have the benefit of the bots we have today, and they felt the right play was 8/4! 

This was part of the Monster Quiz that gave the winner a free trip to Monte Carlo, and it was none other than Kit Woolsey who won the quiz.  By the way, his answer to this puzzle was to make play C--13/10, 2/1.   Back then, they felt that hitting just left too many blots, but it's right by a lot.