If they overcall without disturbing the auction, our bidding is mainly unchanged, with the following exceptions and additions:

  • Pass may still be weak, but it might also be that we would have made the bid they have just made (sometimes called a trap pass). In this case, we will bid more later, or pass partner's re-opening double.
  • After their 1 overcall of either 1 or 1, double is a substitute for 1 (provided their bid does not show hearts!) Otherwise, a double of their one-level suit overcall shows a hand that would have bid 1NT but does not have a stop in their shown suit(s). If such a double is available, then 1NT instead promises the stop.
  • Redouble is always for rescue, disturbing the auction. Many systems complicate themselves unnecessarily by pushing some goodish hands through redouble, and changing the meaning of all other bids.
WestNorthEastSouth
11
dbl
Equivalent in all respects to a response of 1, so e.g. a 2NT rebid by opener would strongly agree hearts.
WestNorthEastSouth
11
dbl
8 to 10 points with no heart fit, no spade stop and no six-card minor.
WestNorthEastSouth
11
1NT
8 to 10 points with a spade stop.
WestNorthEastSouth
1dbl
redbl
Help, get me out of here! This is only appropriate on weak shape-suitable hands e.g. 4441. The auction is disturbed, so opener's rebids of 1, 2 and 2 will all be to play.
WestNorthEastSouth
111pass
2
Non-jump neutral cue bids have no special significance, so this 'cue bid' just has its normal neutral meaning: a game-forcing relay.

NEXT: they open, we compete