現代叫牌工具：改進的雙路斯臺曼約定叫(格蘭特·貝茨)

XYZ, theconvention
By BBOer Fluff (Bernard Marcoux)
In thisarticle (quite long, sorry about that - but I promise it is worth it), we willexamine a convention that is called XYZ. Many top players play thatconvention. My partner and I have been playing this for a great number ofyears and we have worked a lot to develop and refine it.

Why xyz? What does that mean?

1x 1y
1z

meaning

1any 1any
1any

The only important thing is that opener's rebid is at the one level, either a suit or NT.

So, when the bidding goes that way, a 2♣ rebid by responder is artificial, forcing opener to bid 2♦.

Opener
Responder
1♣

1♥

1♠/1nt

2♣!

ALERT! If they ask, you say: partner orders me to bid 2♦ (or, if you have to self-alert, artificial,forces 2♦ byopener)

This relay generally initiates INVITATIONAL sequences. Responder can showa number of hands with invitational strength. But this relay can also beused for this:

Opener
Responder
1♦

1y

1z

2♣

2♦

Pass

The 2♣ forces opener to bid 2♦ andresponder then passes.

A direct 2♦ rebidby responder is artificial and Game Forcing, even if opener's first bid was 1♦:

Opener
Responder
1♣/1♦

1♥

1♠/1nt

2♦!

ALERT! If they ask, you say: Artificial, Game Forcing.

So if you want to play 2♦, as responder, you cannot bid 2♦ directly. You have to use 2♣ and pass over the forced 2♦ rebid by opener.

The general structure is this:

A 2♣ rebid by responder is artificial and asks opener to bid 2♦. Responder will then pass or show different invitational hands.
A 2♦ rebid by responder is artificial, game-forcing, and asks opener to describe his hand.

What do we lose? After xyz, we cannot play 2♣. Whowants to play 2♣??J

1. Invitational sequences

Opener
Responder
1m

1y

1nt

?

Quick studies will have noticed that we have now 2 ways to invite by 2nt:

we can bid it directly after the 1nt, or
go through the artificial 2♣, forcing 2♦ by opener, and then rebid 2nt.

As nature hates voids, these 2 ways have to show differentthings. My partner and I play Lebensohl Fast Shows. So, to make it easy on memory, we play the same thinghere: direct 2nt shows 11-12 points and a 4 card fit in opener's minor, or atleast Hxx, the honour being A, K or Q.

Opener
Responder

1♦

1M

1nt

2nt = partner, I have 11-12 and 4 cards in diamonds, or Hxx

If you go through 2♣, then rebid 2nt (slow way), you still have 11-12points, but deny 4 cards in opener's minor. Opener with AKxxx, knowing a 4 card fit in his suit orQxx, can better evaluate the trick taking potential.

Opener
Responder

1♦

1M

1nt

2♣

2♦

2nt = partner, I have 11-12 points, but not 4 cards in your suit

What do you do if you have 5+ cards in opener's minor?
You go through the relay and then support.

Opener
Responder

1♦

1M

1nt

2♣

2♦

3♦ = partner, I have an invitational hand with 5+ cards in your suit

Same thing if the opening bid was 1♣.

Opener
Responder

1♣

1M

1nt

2♣

2♦

3♣ = partner, I have an invitational hand with 5+ cards in your suit

So what do you do with this hand:

Opener
Responder

1♣

1♠

1nt

3♣ = weak, preemptive

The jump to 3♣ at second turn by responder is weak, preemptive. Remember: afterxyz, you cannot play 2♣.
Let's see this sequence now:

Opener
Responder

1♣

1♥

1♠

2♣

2♦

2♥

What is responder showing? He is showing an invitational hand with 5+hearts. The advantage is that responder will play 2♥ instead of 3, as it would have happened if he were usingstandard methods. If he had 6 good hearts, responder would go like this.

Opener
Responder

1♣

1♥

1♠

2♣

2♦

3♥ = I have invitational values and 6 good hearts, AQJxxx, AQ109xx

If you have this hand:

Opener
Responder

1♦

1♥

1♠

?

Using standard methods, you have to jump to 3♠, showing invitationalvalues. With xyz, you can show the limit raise and still play at the 2level.

Opener
Responder

1♦

1♥

1♠

2♣

2♦

2♠

Pass

Very economical, no? Everybody will be in 3♠, struggling, while you willplay a cool and relaxed 2♠.

Opener opens 1♥.

The case with the 1♥ opening bid isinteresting.

Opener
Responder

1♥

1♠

1nt

?

Responder still has 2 ways to invite in no trump: directly andindirectly. So we have defined this agreement: direct way (Lebensohl fastshows) shows a helpful doubleton in hearts, Hx or at least J10.

Opener
Responder

1♥

1♠

1nt

2nt = partner, I have 11-12 with Hx in hearts, or at least J10

Knowing that, opener can now count tricks (instead of points) if his heart suitis AQJxx (responder shows the K, so 5 tricks there) or KQxxx (responder showsAx or J10, so at least 4 sure tricks there).

If you go through the relay, you still have 11-12 points, but no useful cardsin opener's suit.

Opener
Responder

1♥

1♠

1nt

2♣

2♦

2nt = partner, I have 11-12, but nothing to help you in hearts

Let's see a few example hands:

Responder's 3♣ says "partner, I have 11-12, 5 hearts and 5 clubs".

Responder's 3♥ says"partner, I have 11-12, 5 spades and 5 hearts".

Now 2♥ says"partner, I have 11-12, 5 spades and 4+ hearts".

As always with xyz, if opener is minimum, you will play at 2nd level instead of3rd level with standard methods. Big advantage.

The 2♣ relay initiates invitational sequences, but we can use it also for thistype of hand:

In standard methods, you have probably only one bid: 4nt quantitative. But why play 4nt when you can play 3nt?

Opener
Responder

1♦

1♠

1nt

2♣

2♦

3nt = partner, I have 19 pts, an invitational hand for slam

Opener will decide.

2. Game forcing sequences

Let's start by saying that any jump rebid by responder (except 3♣ preemptive)is Game Forcing and shows a good suit. By any jump rebid, we mean:

responder jumps (rebid) in his own suit;
responder jumps (rebid) in support of opener's suit;
responder jumps (rebid) in a new suit.

Examples:

The jump to 3♠ is game forcing and shows very good spades.

The jump to 3♠, this time in opener's suit, is game forcing and shows verygood spades (at least 2 top honors)

The jump to 3♥ showsa two-suited hand with both majors 5-5, good spades and hearts

What do you do if your suit is not that good?

In this case, responder can use the artificial 2♦ to set the game force, then continue to describe the hand.

Examples:

The jump to 3♠ shows a game forcing hand with 6 spades with some holes. Openerwith Kx in spades can then simply bid game with a minimum or cue-bid with amaximum.

I will end this looong article with a fun hand we played in a live competition:

I know, this jump to 7♠ is majestic, but my partner likes those jumps. Wehave also defined this rule: after a major suit fit is found, we NEVER play3NT. So 3NT becomes available for a new meaning, and it says: I have slamaspirations, but I don't have the Ace of clubs. Please tell me if youhave it.

Notice that with the void, RKC is not efficient. The jump to 3♠,promising 2 top honors, clarifies everything for opener, guaranteeing that thetrump suit is solid.

It would be too long to examine all sequences, but the bridge playingreaders can appreciate this basic structure and develop their own refinements.

One last thing: in competition, xyz is always ON, except when opener doesn'tmake a bid, meaning if he passes. If he bids something, even a double, xyzis on.

Hope you liked this article and that you will adopt xyz, a simple and funconvention to play.

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

今天，我在BBO新闻里，看到fluff的最新研究文章，XYZ约定叫。

该文没有太多的新意，比照格兰特·贝茨的《改进的双路斯台曼》又少了一个splinter。通观全文，唯一可以说有点价值的搭档间的定义约定是：

3nt = partner, I have 19 pts, an invitational hand for slam

3nt=19hcp，邀请满贯。

这是具体内容的链接：
http://webutil.bridg...tch.php?id=1468

BBO Discussion Forums: 現代叫牌工具：改進的雙路斯臺曼約定叫(格蘭特·貝茨) - BBO Discussion Forums

現代叫牌工具：改進的雙路斯臺曼約定叫(格蘭特·貝茨) Modified Two-Way Stayman (Grant Baze)

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