Defence to 1NT

Page 2

by David Stevenson

This article is continued from here

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

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

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.

Name:	Mirror Hamilton		Roth-Stone	Kelsey
Dble	Penalties		Penalties	Penalties
2	/ + /		+	+ + /
2	+		+	+ + /
2
2
2NT	+
3			+
3			+
ACBL GCC:	Yes		Yes	Yes
EBU L2:			Yes	Yes

Name:	RCO [Weak NT]	Kirmar	No name	Auby
Dble	Penalties	Penalties	Penalties	Penalties
2	+ or +	or or + //	or 4/ + 5/	+
2	+ or +		+	or , 8-11 or 16+
2				, 12-15
2				, 12-15
2NT	+ or +			+
3			+
3			Game force 2-suiter [not + ]
ACBL GCC:		Yes	Yes
EBU L2:

Name:	Collins	Becker	Rodwell	Half-Astro
Dble	Penalties	Penalties	Penalties	Penalties
2	+	+	+ /	+
2	+	+	+ /	+ /
2
2
2NT	+ /
3	+
3
ACBL GCC:	Yes	Yes	Yes	Yes
EBU L2:	Yes	Yes	Yes	Yes

This article continues here

Editor's note:

• If you want to comment on this article, why not write direct to me, David Stevenson? I shall be pleased to hear from you!
• Chris Ryall discusses 1NT philosophies

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