Before I retired from public education, I used to coach junior varsity golf. Every year I made the guys play a two club, nine hole tournament, one of which was the putter. (I didn't want the regulars at the golf course seeing a bunch of teenagers putting with five irons, or I would have made them use one club.)
The irony of the challenge was that someone would shoot 41 or 42 with two clubs, then go out the next day and shoot 45 with all 14 clubs. Ah-h-h-h-h-h-h-h!