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Defence to 1NT

Page 3

by David Stevenson

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This article is continued from here

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Any defence to 1NT is permitted at ACBL MidChart and EBU Levels 4 and 5 (and the former Level 3, and Level 2 in fourth seat or after passing), so all of the following are permitted. The chart below also shows which defences are permitted at ACBL GCC, and EBU Level 2 (second seat).

Pages 1 to 2 Double is for penalties, 2H/S are natural.
Page 3 Double is for penalties, 2H/S show 2-suiters.
Page 4 Double is for penalties, 2H/S show varied hands.
Page 5 Double shows a one-suited hand.
Page 6 Double shows a two-suited hand, 2H/S are natural.
Page 7 Double shows a two-suited hand, 2H/S show varied hands.
Page 8 Double shows a varied shape hand, 2H/S are natural.
Page 9 Double shows a varied shape hand, 2H/S show varied hands.

Note that D or H + S means diamonds or the majors, and not a red suit plus spades, which would be expressed as D/H + S.

If you want to print these diagrams see here for a printer-friendly set of pages without all the headings, and with only two diagrams per page.

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Name:Cappelletti
Hamilton
Pottage
Mod Capp Crowhurst
Rev Pottage
Mod Capp
Multi-Landy
Hamilton 3's
DblePenaltiesPenaltiesPenaltiesPenalties
2C C or D or H or S D or H or S H + S C or D or H or S
or 4S + 6C/D
2D H + S H + S H or S H + S
2H H + C/D H + C/D H + C/D H + C/D
2S S + C/D S + C/D S + C/D S + C/D
2NT C + D C + D C + D C + D
3C  C C 4H + 6C
3D   D 4H + 6D
3H     H
ACBL GCC:YesYes Yes
EBU L2:    

Name:Middlesex AstroOliver SimpletonCanape Transfers
DblePenaltiesPenaltiesPenaltiesPenalties
2C 6H or 4H + C/D/S C or D or H or S
or C + D + S
C or D or H or S 4D + 5C/H/S
2D 6S or 4S + C/D/H D + C/H/S D + S 4H + 5C/D/S
2H 5H + C/D or 5H + 5S H + C/S H + S 4S + 5C/D/H
2S 5S + C/D C + S S + C 4C + 5D/H/S
2NT Strong 2-suiter C + D + H C + D  
3C   C + H + S C + H  
3D   D + H + S D + H  
ACBL GCC:YesYesYes 
EBU L2:Yes   

Name:SoapGromöller Advanced GromöllerDixon
DblePenaltiesPenaltiesPenaltiesPenalties
2C H C or D or H + S C or D or H + S
or 4S + 5C/D
C + D/H/S
2D S H or S H or S D + H/S
2H 4H + 6C/D 5H + C/D 5H + C/D H + S
2S 4S + 6C/D 5S + C/D 5S + C/D C + D
2NT   C + D C + D  
3C C, 11-15    
3D D, 11-15    
ACBL GCC:Yes  Yes
EBU L2:Yes  Yes

Name:Petra (weak NT)   
DblePenalties   
2C D + H or H    
2D H + S or S    
2H H + C   
2S S + C/D    
2NT C + D   
3C     
3D     
ACBL GCC:Yes   
EBU L2:Yes   

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This article continues here

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Editor's note:

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