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ChinaStory · 发表于 2004-3-29 09:52

Post by ChinaStory
Maximal Overcall Double

For major suits only and in conjunction with "Game Try - Help Suit" conventional bid.

When you and partner have bid and raised a suit and opponents have overcalled. Opener’s double of opponent’s overcall is a Maximal Double, not a penalty double. Used when opponent’s overcall(s) makes it impossible to use the “Game Try - Help Suit“ bid. The Maximal Double differentiates between a competitive bid and a game-inviting bid. Remember, The Maximal Double is used only when the level is too high to use a Game Try bid.

ChinaStory · 发表于 2004-3-29 09:53

When you and partner have bid and raised a suit and opponents have overcalled. Opener’s double of opponent’s overcall is a Maximal Double, not a penalty double. Used when opponent’s overcall(s) makes it impossible to use the “Game Try - Help Suit“ bid. The Maximal Double differentiates between a competitive bid and a game-inviting bid. Remember, The Maximal Double is used only when the level is too high to use a Game Try bid.

From the bidding and partner’s response, opener sees game if partner has maximum values for his bid.

ChinaStory · 发表于 2004-3-29 09:59

For major suits only and in conjunction with "Game Try - Help Suit" conventional bid.



When you and partner have bid and raised a suit and opponents have overcalled. Opener’s double of opponent’s overcall is a Maximal Double, not a penalty double. Used when opponent’s overcall(s) makes it impossible to use the “Game Try - Help Suit“ bid. The Maximal Double differentiates between a competitive bid and a game-inviting bid. Remember, The Maximal Double is used only when the level is too high to use a Game Try bid.



From the bidding and partner’s response, opener sees game if partner has maximum values for his bid.

If opener rebids suit a third time it is competitive, not invitational.

If opener doubles the opponent’s overcall, it is an invite to game. Of course, partner my convert to penalty by passing.

Example 1:

[ 1S (2H) 2S (3H) ] : [ ??

Level is too high for a “Game Try – Help Suit” bid.

Double means to sign-off at 3S or bid 4S. (With maximum values, partner may convert to penalty if vulnerability is favorable and holds a lot of opponent’s suit – rare.)

A bid of 3S is competitive, responder should pass.

Example 2:

[ 1H             (Pass)                      2H                (2S) ] : [ ??

In this case, your side’s level is low. Don’t use the Maximal Overcall Double.

3H is competitive.

A new suit is is an invite if responder has a singleton or a couple of high honors in that suit. (See “Game Try – Help Suit Bid”).

ChinaStory · 发表于 2004-3-29 10:01

HelpSGT

You open one in a major, partner raises, you now respond with a new suit.


[ 1S : 2S ] : [3C*.....You are telling partner, “I am trying for game, I know you hold 3 or 4 trumps (unless playing Bergen, then only 3 trumps) and have 7 - 10 support points; if you have a close decision, look at your club holding – that’s where I need help”.



Your hand along with partner’s response of two in your major suit shows that the partnership has a marginal chance at game. If partner has more than a dead-minimum and can “help” in the second-bid suit with either shortness or a couple of high honors, he carries on to game. Otherwise he signs off at the three level.



Examples:

[ 1S : 2S ] : [ 3C*.....help-suit game try

Partner responds as follows:

Axx Kxx Jxx xxxx

   3S (no help)

Axx xx xxxxx AJx

                           4S (help)

Qxx xx Jxxx KQxx

   4S (help)

xxxx xx Jxxx KQx

                           3S (has help but is minimum)

                     AxxKxxx xxxxx x

4S (shortness probably helpful)

Note: May be used in competition if the help-suit bid allows the responder to rebid opener’s suit at the three-level.

* = bid must be alerted

ChinaStory · 发表于 2004-3-29 10:02

Support Double/Redouble

You open the bidding, LHO may or may not overcall, partner responds in his major suit, RHO overcalls partner’s bid. You make a Support Double* to show exactly three-card support for partner’s major suit. If you have four-card support you would support his suit by bidding it*. If, instead RHO doubles (negative) over your partner’s response, you do a Support Redouble* to show exactly three-card support.



Purpose is to tell partner how many cards you have in support of his suit.



Only when partner’s response is a major suit.

You can have any type of hand.

Doubles are “support” up to a bid of 2H (some play through 3S) by RHO. Otherwise the double is for penalties.

Off if RHO’s bid is greater than 2H (unless you play on through 3S).

Off if you know partner’s major suit response shows five or more cards.



Exception:

[ 1C             (1H) 1S    (2H) ]

This is unique sequence indicates partner has five or more spades. If he had four he would have made a Negative Double. In this case you do not make a Support Double with three-card support. Simply bid 2S.

Note: If partnership agrees to bid  4-card majors at the one-level in lieu of a Negative Double then a Support Double is proper in the above example.



* = bid must be alerted

ChinaStory · 发表于 2004-3-29 10:05

"Voidwood" (Exclusion Blackwood)

“Voidwood”, or “Exclusion Blackwood”, was introduced by Bobby Goldman. Voidwood is used to show a void and simultaneously ask for key cards outside the void suit.

[ 1C : 1H ] : [ 3H : 5D*.....the 5D bid makes no sense as a cue-bid (4D would be a cue-bid) or natural bid, hence it is “Voidwood” and says: “I am void in diamonds. Give me your key card answers but ignore the ace of diamonds in your reply”.

Similarly, [ 1C : 1H ] : [ 3H : 4S* or 5C* ] would be “Voidwood” since 3S or 4C would be a cue-bid.

Responses to "Voidwood"

Three popular treatments in answering the "Voidwood" bid are:

1. Roman Keycard - Same steps* as RKC 0314 or 1430

2. Roman Gerber

Step 1* = 0 or 3 keycards

Step 2* = 1 or 4 keycards

Step 3* = 2 keycards and hand without extra values.

Step 4* = 2 keycards and hand with extra values

3. Key Card Gerber

Step 1* = 0 or 4 keycards

Step 2* = 1 keycard

Step 3* = 2 keycards

Step 4* = 3 keycards

* = bid must be alerted

ChinaStory · 发表于 2004-3-29 10:07

Gerber/Super Gerber

A. Regular Gerber - 4C

The only place to use 4C as Regular Gerber is:

[ 1NT : 4C.....4C is Regular Gerber.

[ 2NT : 4C.....4C is Regular Gerber.

[ 2C : 2D,2H, 2S or 2NT ] ; [ 2NT or 3NT : 4C.....4C is Regular Gerber.

B. Super Gerber

The only place to use Super Gerber is when 3NT was the last bid in a sequence. Bidding the cheapest unbid suit at the four level is Super Gerber. If there is no unbid suit a 5C bid over 3NT is then Super Gerber:

[ 1D : 1S ] : [ 2C : 3NT ] : [ 4H*.....4H is Super Gerber since hearts is the cheapest unbid suit.

[ 1C : 2C ] : [ 2H : 2S ] : [ 3C : 3NT ] : [ 4D*.....4D is Super Gerber. Diamonds is the unbid suit.

[ 1D : 2D ] : [ 2H : 2NT ] : [ 3NT : 4C*.....4C is Super Gerber. Clubs is the cheapest unbid suit

[ 1D : 1H ] : [ 2C : 2S ] : [ 3NT : 5C*.....5C is Super Gerber since all suit have been bid.

[ 1C : 2C ] : [ 2H : 2S ] : [ 3C : 3NT ] : [ 4C*.....4C is not Super Gerber since clubs have been bid.

* = bid must be alerted

ChinaStory · 发表于 2004-3-29 10:08

Free Bid

Free Bids are not a convention but rather a partnership understanding. A Free Bid occurs when partner opens and opponent overcalls and responder bids a suit (the Free Bid) at the two-level or higher (non-jump). Remember, this is not the “Negative Free Bid” convention. The Free Bid, when made, requires no alert.

Note: the “Negative Free Bid” convention is not used, although the “Negative Double” is used in conjunction.



There are three treatments for Free Bids:

1. A non-jump two-bid shows 10+ HCP and always a five-card suit (major or minor).

2. A non-jump two-bid shows 10+ HCP and a five-card suit if a major, or a four-card suit if a minor.

3. A non-jump two-bid would show the same values necessary for a 2-over-1 bid, a minimum of a “good” 12 HCP or more, and always a five-card suit (major or minor).



Max Hardy recommends either Treatment 1 or 3 of the Free Bid and doesn’t recommend the “Negative Free Bid” as an alternative.

I recommend Treatment 1 whether using 2-over-1 or SAYC. Treatment 1 can be described by the "Rule of 10 and 5" .....  you must have 10 HCP and at least 5 cards in your suit to bid you suit at the two-level after opponent has overcalled.

Using Treatment 1 as the preference:

The purpose of the Free Bid is to show a five-card suit;

and, Show at least a game-invite type of hand.

Used in conjunction with the Negative Double. The Negative Double will usually promise the unbid suits, especially the unbid major(s). The Negative Double requires about 8+ HCP at the two-level and 10+ HCP at the three level, with no upper limit.

If the bidding goes: 1D (1S) and you hold:

A5

KJT53

K42

K83

Make a Free Bid of 2H.

A5

KJT3

K965

K82

You have the values for a Free Bid but don’t have the 5-suit requirement. Make a Negative Double.

64

KQ853

Kt5

842

You have the 5-card suit requirement but not the values for a Free Bid. Make a Negative Double.

Q87

65

AKJ98

JT3

Make a Free Bid of 2D.

When you have a one-suited hand but can’t make a Free Bid, you make a Negative Double then rebid your long suit. This warns partner that your Negative Double was an excuse to show your length and that you do not have values for a Free Bid, nor did you promise support in the major(s).

The bidding goes: 1D (2C) and you hold:

KQT984

K6

73

864

You don’t have the values to make a 2S Free Bid. You make a Negative Double, partner assumes you have hearts and spades. If partner rebids 2H (expecting you to have hearts), or 2D, or 2NT -- you rebid the spade suit telling partner you have a one-suited hand in spades with 7 – 9 HCP and no heart suit as initially believed. Of course if partner rebids 2S you jump to 4S (“Fast Arrival”).

Note: There are rare occurrences when neither a Free Bid or a Negative Double can be made when holding some values:

The bidding goes: 1C (1S) and you hold:

875

65

AKJ98

JT9

Can’t make a Free Bid (only 9 HCP). Can’t make a Negative Double (no heart support; if partner rebid 2H, the diamond suit is not long enough to rebid 3D). This is one of those “tweeners” that should be passed. If partner reopens with a double, you now rebid 3D.

ChinaStory · 发表于 2004-3-29 10:10

One-Two-Three Stop

Major Suits Only



Used to compete with opponents. Makes it hard for them to balance or compete.



1. [ 1S (Pass) 2S (Pass) ] : [ 3S*

2. [ 1H    (1S)    2H (Pass) ] : [ 3H*

3. [ 1H    (2C)    2H    (2H) ] : [ 3H*



1-2-3 Stop.

This is always competitive and not invitational.

The responder must not bid again unless making a penalty double.

If opener wants to invite a game he must use a “Help Suit Game Try” bid. If the level is such the “Help-Suit Game Try” bid can’t be employed, then the “Maximal Overcall Double” is employed to invite partner.



See: "Help Suit Game Try" and "Maximal Overcall Double" conventions.



* = bid must be alerted

ChinaStory · 发表于 2004-3-29 10:14

"Criss-Cross" Inverted Minor

Based on Bobby Goldman's treatment of the Inverted Minor convention

After opener bids 1C or 1D

Simple raise is a game force*

Promises at least 13 HCP (or a good 12)

Promises at least 5 clubs (or an excellent 4) if clubs are trump

Promises at least 4 diamonds if diamonds are trump

Denies a four-card major suit.

A jump raise to the three level is preemptive*

Shows less than 7 HCP (usually 3 - 5)

Promises at least 5 trumps

Denies a four-card major suit.

A jump shift in the other minor* ("Criss-Cross")

Shows limit raise values and is non-forcing

Denies a four-card major suit.

Examples:

[ 1C or 1D : 2C* or 2D*.....game force

[ 1C or 1D : 3C* or 3D*.....weak trash less than 7 HCP, usually 3 – 5 HCP

[ 1C : 2D*.....limit raise values in clubs (non-forcing)

[ 1D : 3C*.....limit raise values in diamonds (non-forcing)

In competition

Inverted Minor convention is off

Preferred: Immediate cue bid of opponent’s overcall, or 2NT* (Jordan 2NT convention) over opponent’s takeout double shows limit raise or better. Any level raise* is then weak and competitive according to the Law.

Alternate: A double raise by responder in competition is a limit raise*.

* = bid must be alerted