After the opponents open a weak 2 bid in front of us, our goals are similar to when they open at the one-level, but our risk is higher than before. Not only are you a level higher, but if you are overcalling in the direct seat, any defensive values for the opponents are likely to be behind you.
So, whereas we’re happy to overcall at the one-level with an eye to competing for the part-score, or sacrificing against their contract, my advice when they open at the two-level or higher is to bid only if there is some chance that your side can make a game. Therefore it is important to note when partner is a passed hand, and to have a bit in reserve in those cases.
Basically, overcalls require a good suit and takeout doubles need a three-suited hand, with 3-card support or more for the unbid suits. Now, this isn’t always practical, suppose they open 2♥ and you have:
The suit isn’t one you’re proud of at this level, but the hand is good enough to compensate most of the time, and you won’t do well to get shut out. This is an even scarier proposition if their suit is spades and you have to bid yours at the three-level.
Cue bids show two-suited hands, and they should be good ones, not preemptive in nature. Since we don’t have the jump in notrump available to show the two lower unbid suits, the cue bid shows any two of the unbid suits, partner bids the lowest suit she can raise, and if that’s not one of them, you are expected to correct to your next ranking suit.
Balancing does not exist after the opponents preempt. You need about the same values to bid in either seat. The reason is that the partner of the prempter will often pass with quite a strong hand when there is a misfit. In effect, you can’t be sure that your side has the “balance of power” at all.
2NT overcalls are 16 - 19, with all systems on as over a 2NT opener.
3NT overcalls are likely based on a stopper and some tricks.
|6.6 Defense to Flannery 2♦||Lebensohl Responses to Takeout Doubles of Weak Two Bids|