We were in a nine-team bracket, which meant that the first day would be all three-way matches. Basically, in a three-way match (or "round-robin" or "ring") you play half of a standard-length match against two other teams. If you beat both other teams, you continue to the next round. If you lose to both, you're out. If you beat one team, but the team to which you lost won both of its matches, you're in. And if each team wins one match and loses one, the team with the lowest IMP total gets dropped. Basically, the strategy for a three-way match is the same as a heads-up match: win more IMPs than you lose!
So to start out, we played two six-board matches.
(A) Red vs. white
You open 1H. Pard bids a forcing 1NT. You rebid 2C [or would you bid 3C?] and pard jumps to 3NT. This should show something like 12-14 or 13-15 or something like that... what's your call?
(B) All white
Partner opens a weak [good 11 to 14] 1NT. How do you plan on handling this hand?
(C) All white
Partner opens 1C, you bid 1S, and he rebids 2H. What next?
(D) All red
Partner opens 1S. LHO bids 2H. It's your decision.
We only won two of our four matches, but we survived easily.