From: c85perwe@IDA.LiU.SE (Per Westling)
Subject: Re: Defense against defense against Precision 1 club
Reply-To: c85perwe@und.ida.liu.se
Organization: CIS Dept, University of Linkoping, Sweden
	<40852@apadravya.princeton.edu>
Date: Wed, 9 Sep 1992 08:15:32 GMT

In article <40852@apadravya.princeton.edu> bpwing@phoenix.princeton.edu (Ben Wing) writes:
> In article <C85PERWE.92Sep8095453@odal23.IDA.LiU.SE> c85perwe@und.ida.liu.se writes:
> ...
>
> When I played a 1C system recently, the "defense to interference" we used was 
> equally simple, but switched the meanings of bid and double, i.e.
>
> 1c - 1 of suit or 2c -
>
> P = very weak hand

A common variant is to use P as possibly strong with the over call
suit.

> X = any positive hand
> minimum bid = semi-positive strength (5-8 or whatever), natural
>
> This leaves you better-placed if opener's RHO interferes at some reasonable
> level.  (and possibly worse-off if RHO pre-empts sky-high, but that's not
> as likely)
>
> Over interference of 2d - 2s, we used Rubensohl transfers, i.e.
>
> 2-level suit bids = natural, non-forcing
> 2n - 3h = transfer to next-higher suit; game-forcing if a transferring
>	to a suit above the one bid by opponent
>
> |Due to the common interferences over strong 1 C, I play two-way 1 C
> |instead.  Ie 1C is 10-12 balanced or 17+.  This forces the opponenets
> |to be more constructive.  The easiest defence against this system is:
> |
>
If playing two-way club, the defence against higher overcalls (2C+) is
the same against overcall versus natural NT openings, as partner is
often 10-12.

> I like the idea of this system.  What are the continuations, both with
> and without interference?
>
>
> ben

After D
	RD 12+
	Pass very weak
	1X weak or moderate, 5c
	1NT Natural
        2/3X tends to be preempts
	2NT Minors

After 1X
	D take-out
	1NT Natural (8-12)
        Suit Natural
	Overcall, game force without stopper
	2NT Game force including stopper

After 1NT and higher:
	As after overcall to a natural 1NT opening


With 10-12 partner may raise suit calls 1-2 levels, or bid 1S/NT, over
suit calls.  After take-out bids up to 3C is allowed.  D of RHO is
penalty either weak or strong.

Almost all other actions show 17+.


Well, that was after interference.  This is what is used in the
well-known (?) system Carrot, but I think similar methods is used in
other two-way systems.

Continuations after 1C without intereference in Carrot is
[with openers respons]:

1D = 0-7  	[1Major 3-4c, 10-12HCP or 4+c 17+HCP, nonforcing, possibly longer minor
		 1NT (17)18-20
		 2minor Natural, not 4cM
		 Jump: Natural Game force (2NT 24+)]

1HS = 8+HCP, 4+c [1S 4c 10-12 or 5c 17+
		  1NT 10-12
		  2C 17+, clubs/balanced or 4441 with short major
		  2D(H over S), 5+c and 17+
		  2S(over H), 6+c and 17+
		  Raise 4c support and 10-12
		  2NT 20+ and 4c support
		  Raise to 3/4, 3NT and Splinter show (4/5+c) support
and 17-19]
1NT = 8-12 w/o 4cM	[Pass = 10-12
			2X 17+, 2CD may be 4, 2HS is 5+]
2CD = 8-12 w/o 4cM	[Pass/Simple raise = 10-12
      5+ suit            Other 17+, 2NT is asking for single/6+/good suit]
2H = 11+ with both minors or very strong balanced hand (w/o 4cM)
	[2NT = Accept of invitation (17+ or 10-12)
	 3CD = Sign-off (10-12)
	 Other = 17+ with good suit]
2S = Either wants partner to play the NT or Game force with 6+ minor
suit
	[2NT = Waiting bid (10-12 or 17+), Other = 17+ with good suit]
2NT = Invitational without 4cM (13-14)
3X = Preemptive and invitational
3NT = Natural, about 16-19


There are of course several more to this, but this should give you a
good idea of the structure after the 1C opening.



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