Page 89 - 2 over 1 Game Force

Chapter 4: Notrump Opening 89

Bidding with Interference over NT Opening

After a Double

After A Penalty Double

1NT-(DBL)-? DBL = Penalty double shows 15⁺ HCP.

Responder bids

• XX = Ask to bid 2♣, weak hand with suit to sign off

• System on

After a Conventional Double

1NT-(DBL)-? DBL = 12 HCP, 5 m and 4 M
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Responder bid
• XX = Ask to bid 2♣, weak hand with suit to sign off
• System on

After a Simple Overcall

1NT-(2♣)-? 2♣ = club suit or club & whatever

Responder bids:

• DBL = Stayman, 8⁺ HCP, INV⁺
• System on

1NT-(2♦)-? 2♦ = diamonds suit or diamonds & whatever

Responder bid; system off; →Rumpelsohl
• DBL = Penalty double

• 2♥ = Negative Free bid, 5⁺ ♥, to play

• 2♠ = Negative Free bid, 5⁺ ♠, to play
• 2NT = Puppet to 3♣

o 3♣ = as puppet

• Pass = Weak hand, 5-7 HCP, 5⁺ ♣

• 3♦ = Stayman with stopper ♦
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• 3♥/3♠ = Invitational 5 ♥/♠

2 over 1 Game Force | 2D Strong Balanced & Gazzilli