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Quiz: Barrier-Reversing

Quiz: Deal # Thursday
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Basic
strategy
0000). How to use 0001). Bidding Objectives = "8 and 25" 0002). 28 for minor 0003). 33 for NT slam 0004). Suit slam 0005). Importance of length 0006). Convention card 0007). ACOL and American Standard, differences 0008). A-Z Glossary 0690). A-Z Glossary
Hand
evaluation
0010). Balanced-Unbalanced 0011). How strong is your hand, HCP 0012). Distribution points 0013). Losing trick count 0014). Barrier-Reversing 0015). Selection of opening suit 0016). Showing shape 0017). 4441 distribution 0018). The skip over principle 0019). Rule of 20 Opening 1 of a suit 0019a). Rule of 25 Opening 2 of a suit 0019b). Rule of 500 Max penalty risk on preempt if doubled 0019c). Law of total tricks 0019d). Rule of Protective bidding
Opening
bids
0020). Plan of attack 0021). Bal, 12 to 19 HCPs, weak NT 0022). Bal, 20+ points 0023). Bal, 15 to 17 HCPs, strong NT 0025). Unbal, 12 to 19 HCPs, 1 suit 0026). Unbal, Strong 2s 0027). Unbal, Pre-emptive 0028). Unbal, Gambling 3NT 0029). Benji Strong 2s
Responder
1st bids
0030). After 1NT, General principles 0031). After 1NT, Weak 0032). After 1NT, Getting out of trouble 0033). After 1NT, 11+ balanced 0034). After 1NT, 11+ 4-card major 0035). After 1NT, 11+ unbalanced 0036). After 1NT, 19+ 0037). After 2NT 0038). After 1NT, and Enemy has interfered 0039). 1 NT responses 0040). After 1 Suit, With fit 0041). After 1 Suit, No fit, but alternative suit 0042). After 1 Suit, No fit, no new suit, probably balanced 0043). After 1 Suit, 6 points, nothing to bid 0044). After 1 Suit, Very strong 0045). After 1 Suit, Weak freak 0047). After 2 Suit, Strong 2s 0048). After 2 Suit, Weak 2s 0049). After 3 Suit, Responding to preempt
Openers
rebid
0050). Unbalanced, The general idea 0051). Unbalanced, You are weak 0052). Unbalanced, You are strong 0053). Unbalanced, Partner replied with 1NT 0054). Unbalanced, Delayed support 0055). Balanced
Responder
rebids
0060). Responder rebids, The general idea 0061). Choice of two suits 0062). Responders reverse 0063). After 1NT rebid
Basic
Convention
0080). Stayman 0081). Transfer 0082). Transfer after 2NT 0161). Minor suit transfer
Slam
bidding
0090). Slam, Spotting the chance 0091). Blackwood 0092). No-trump slam 0093). Gerber 0094). Extra slam techniques
Interfering
bids
0100). Overcalls, the basic idea 0101). Overcalls, in a suit, over a suit 0102). Overcalls, in a suit, over 1NT 0103). Overcalls, in NT, over a suit 0104). Overcalls, Jump overcall 0105). Overcalls, Double then bid a suit 0106). Overcalls, Bidding opponents suit 0107). Overcalls, Balancing (protective) 0108). Overcalls, Overcall a preempt 0109). Overcalls, Preemptive double jump 0110). Overcalls, To overcall, or to double 0111). Overcalls, Response to 1NT after suit overcall (Lebensohl) 0115). Defence after 1NT 0116). Competitive bidding 0117). Be cautious sometimes 0118). Sacrificing Be bold when non-vulnerable 0119). Sacrificing 0120). Doubles, Double a 1NT 0121). Doubles, Double for takeout 0122). Doubles, Doubling after opponent overcall 0126). Doubles, Protective double
Doubles

0120). Doubles, Double a 1NT 0121). Doubles, Double for takeout 0122). Doubles, Doubling after opponent overcall 0123). Doubles, Negative double 0124). Doubles, Double a 1NT overcall 0125). Doubles, Double a suit over 1NT 0126). Doubles, Protective double 0127). Doubles, Responsive double 0128). Doubles, Double then bid a suit 0129). Doubles, Penalty 0130). Doubles, Support double 0131). Doubles, Lead directing double 0132). Doubles, Maximal double 0133). Doubles, Redoubling - coded meanings 0134). Doubles, Forcing Pass 0135). Doubles, Re-opening double 0139). Doubles, Index of doubles
Advanced
Convention
0150). Majors Jacoby 2NT 0151). Majors Splinters 0152). Majors Weak 2s 0153). Majors Weak 2 defence 0154). Trial bid 0160). NT and minors 4th suit forcing 0161). Minor suit transfer 0162). DONT Bidding When Opponents open 1NT 0163). Game tries 0166). Grand Slam Force 0167). Roman Keycard Blackwood 0168). Cue bidding for controls 0170). 2-suited Overcall Unusual 2NT 0171). 2-suited Overcall Michaels cue bid 0172). 2-suited Overcall Landy over 1NT 0173). Overcall Unassuming cue bid 0179). Very advanced

Quiz How much do you know about this page? Quiz

<= find/hide more deals exploiting this aspect

Quick summary

Responder is saying "Major game is certain, I have 11-13 HCP, and a weak singleton / void. Is Slam on?"

So Opener should now either:

explore Slam if the splinter is opposite either his rubbish or best of all his Ace + rubbish
deny slam interest if opposite a strong suit

Responder can try again if he has a void:

E.g 1-4-4-5

Responder can splinter on the second round of bidding with 3-card support if opener shows 5-cards in trumps:

E.g 1-2-2-4

Print cribsheet

Bridge Venue

+	West
	Q 10 6 2
	J 9
	Q 7 2
	10 4 3 2

	North
	3
	K 8 5 4
	A K J 10 9 6
	K 5

+	East
	K J 9 8 4
	Q 6
	5 4 3
	9 7 6

+	South
	A 7 5
	A 10 7 3 2
	8
	A Q J 8

Example Deal

You: North
Dealer: East
Vuln: all

# 126032

Sorry partner, we should have been in a Slam…
..
Go to quiz (& full page) of deal # 126032
***

Click the + buttons to peep

Click on "q1" below to see question 1, and on "A1" to see the answer.

Question 1

Your partner at South opens one Heart. What should you now bid in reply? (Just look at those wonderful diamonds !)

Question 1

Your partner at South opens one Heart. What should you now bid in reply? (Just look at those wonderful diamonds !)

Answer

After South opens 1H, North knows the partnership has a Major suit fit and sufficient points for game (26 are guaranteed). Sounds like 4 heart game bid, many might say.

But might it be enough for a Slam? Ideally a pair needs 30-31 points to be in the 'slam zone' and trigger investigating the possibility of bidding six of a suit.

North has 'only' 14 HCP points (so the partnership may have as few as 26 points), but his hand is much stronger than that - for two reasons.

(1): The singleton spade means declarer (will be South) may be able to any ruff any weak losing spades in dummy AND (2): the wonderful diamond side suit is another way South may be able to get rid of losers, as well as make some winners from the length.

So North could bid 4NT (Blackwood) over the 1H opening bid, asking partner how many aces he has. When South replies 5S, promising three aces, North can confidently bid 6H - since we've got all the Aces up our sleeve...

Question 2

How might more advanced players at North-South bid to reach 6H?

Question 2

How might more advanced players at North-South bid to reach 6H?

Answer

After South opens 1H, North should realise (with a trump fit and only five losing tricks) that a Slam is likely to be on.

Some players will bid 4NT, and if you play the Roman Key Card version of Blackwood (you should!) partner will respond 5C (promising zero or three of the FIVE key cards - four Aces and the King of trumps). North, having two of the keycards should smile at this point, knowing that not even one keycard is missing. (Surely it can't be 3 Aces missing, given the bidding!) He raises it to 6H.

If a partnership has Splinters (an invaluable Slam bidding tool) in their bidding armoury, the auction will be different. After the opening 1H, North has the ideal hand for a Splinter bid (promising 4+card support for Partner's Major suit, game values and a singleton or void in the Splinter suit), so bids 3S (the unnecessary jump in the suit signifies it's a Splinter bid). South has the perfect holding in spades to take advantage so bids 4NT to check for Aces / keycards. North responds 5H, promising two key cards but no Queen of Trumps. With all five key cards, South can happily bid 6H - and in fact should make all 13 tricks.

Question 3

For the North-South pair, are there any alternative ways of bidding to 6 Hearts?

Question 3

For the North-South pair, are there any alternative ways of bidding to 6 Hearts?

Answer

Yes. On hearing about the Spade Splinter from North (mentioned in question 2), South could cue bid 4 clubs to announce control of the club suit. North then cues 4 diamonds (having control of the diamond suit).

At this point South now knows that all 4 suits are controlled (i.e. no more than one loser per suit), and could then switch to Blackwood, 4NT, to check for first round controls with the 5 keycards, since a dangerous 2 keycards are missing from his hand. North, who uses RKCB (Roman KeyCard Blackwood), will reply that he has two keycards but lacks the Queen of trumps, by bidding 5 Hearts.

South will smile to himself; all is safe for a Small Slam bid of 6 Hearts.

Grand Slam? ...wonders South to himself. But with the Queen known to be among the enemy's 4 trumps, possibly along with the Jack too, he won't risk a Grand Slam since it would require the good fortune of the trumps splitting 2-2. (And that's quite apart from North having to have the King of diamonds, which he hasn't yet enquired about).

Question 4

After the cue bidding of question 3 gets to the RKCB response of 5 Hearts from North, how could South safely enquire about the missing red King, if South did want to pin his hopes on good fortune and risk a Grand Slam?

Question 4

After the cue bidding of question 3 gets to the RKCB response of 5 Hearts from North, how could South safely enquire about the missing red King, if South did want to pin his hopes on good fortune - and risk a Grand Slam?

Answer

Bidding 5NT to ask about Kings. And the answer that comes back is 5 diamonds.

Question 5

Does that 5 diamond bid from North mean either that he has exactly one King, or that he has the King of diamonds at the least?

Question 5

Does that 5 diamond bid from North mean either that he has exactly one King, or that he has the King of diamonds at the least?

Answer

It could be either! Either way, we don't care, because the only King we care about is the King of diamonds, since we've already worked out the position with the other suits.

(But don't forget to agree with your partner which system you are using when asking about Kings with a 5NT bid. We prefer the "which is your lowest ranking King" version, because we often need to be suit-specific at that stage of the bidding for a suit Slam).

...Now the only question for South, who can only be confident of a lowly total of 28 HCP (15 + 11), becomes whether to risk all those lovely bonus points from a successful vulnerable Small Slam (750 + 500 + 6x30 = 1430), in order to get the North-South hands on even more points, 750 more, for a vulnerable Grand Slam (1500 + 500 + 7x30 = 2210). And he's only sure of 26 HCP in total....

. . . .

Some subjects to follow up on
Majors Splinters
Roman Keycard Blackwood
Cue bidding for controls
Selection of opening suit
Extra slam techniques

#1	+	<-- click the + to show/hide one possible Bidding Sequence
West			North	East	South
-			-	p	1H
p			???
			3S	p	4NT
p			5H	p	6H
p			p	p
-			System: Acol (Benji)
suggest a different Bidding Sequence

bid	explained at....
#2	+	<-- click the + for explanation of relevant Bidding Techniques
1H	Unbal, 12 to 19 HCPs, 1 suit
3S	Majors Splinters
4NT	Slam, Spotting the chance
5H	Roman Keycard Blackwood


			Hand evaluation

#3	+	<-- click the + for ideas on the Opening Lead
Opening Lead: West , 2 Reasons, when playing in Either suit or NT contract: 1. unbid suit 2. 4th highest, so I've got 1 or 2 non-touching honours

« 0151 »

Splinters: Getting to slam more often

I like your Major, & I've got a nice singleton too

151. Splinters and Jacoby 2NT are better than jumping to Major game
bid	trumps	message: "I have a game going hand.
Double jump shift in the short suit ("Splinter") e.g. 3, 4//	8	..8-card Major trump fit, 11-13HCP, plus a short suit that could get us to slam".
2NT ("Jacoby 2NT")	8	..8-card Major trump fit, opening hand .. but no great shape help, do you have any shortage? If not, anything else useful?"
3 of partner's Major	7	. . .but only rely on me for 3 trumps. I have no splinter". (Can also be interpreted as 4-card support / 8-card fit, but short on HCP). (With a splinter, bid alternative suit on first round, pending 5-cards from opener).
Single jump shift in a new suit, eg. 2, 3//	x	..I've got 16+ HCP, 6-card new suit. Wow. (Might, or might not, have support for your suit)".
Add to your customised cribsheet

Point Count and Losing Trick Count do not tell you how well your hands fit. But Splinters do, and can get you to Slam with a 11-13 HCP (Acol), that would otherwise only get to game.

If you have 4-card trump support for partner's opening 4-card Major, and 11-13 points (enough normally to jump support in the Major), then, instead, you can bid another suit at the 4 level if you have a singleton or void in it. Eg. 1-4 means you have 4-card Heart support, 11+ points, and void or singleton clubs.

Your partner can then evaluate his holding in the splintered suit ( in this example) as follows, with a view to a Slam bid:

if partner's short suit corresponds to a very poor suit full of losers, (e.g. 974), then great, explore Slam! The problem of your losers has been removed.
with Ace plus rubbish, Axxxx, even better !
if the short suit is opposite winners (e.g. KQJ), then that's a pity. These cards will win anyway, and so your hand is not promoted to greater strength by the ability to ruff that suit. It would be better to have that strength somewhere else. Put it back into game in the trump suit (4 in this example).

If a splinter is rejected, you can rebid the splinter if you have a void. Partner can then re-evaluate.

If you have 3-card support, you can also defer a splinter to the second round of bidding if opener shows 5-cards in trumps. 1-2-2-4 is a strange sequence ! The crazy jump in can only mean OK, we've got 8 cards in , I've got 10-12 and a singleton .

Other types of Splinter

After a minor

You can do this in later rounds of the bidding, but not usually in the first round. You would not normally splinter after a minor opening, as it would be unusual to know so early on that you can make a game in the minor (11 tricks). It would be unusual to splinter after a minor opening if you hold a four-card Major.

If you want to use a splinter when partner opens one of a minor, it's the same as usual: game values, good trump support and a shortage in the suit bid. Since you need 11 tricks for game in a minor, you will generally have five-card support.

After a strong 2 opening

Yes, certainly. In fact you can splinter after any bid, when a jump shift has no other normal meaning.

Why Splinters and Jacoby 2NT are better techniques than a double jump raise to Major game

The same situation. Your partner opens 1, promising 12+ points and a 4-card Heart suit. You have 3- or 4-card Heart support and 11-13 or more HCP. So game is on. But, with a conventional jump support in , some questions remain

Does partner have a 4 or 5-card suit… only his rebid will tell you;
He could have as many as 19 points… but only his rebid will tell you;
How do you tell your partner that you have 3-card support, and not 4, or vice vsersa?
You might have a nice singleton or void to tell him about. How ?
He might have a nice singleton or void to tell me about. How do you give him the chance to tell you ?

The problem is that bidding a conventional 3 or 4 will not illuminate the situation as well as it might.

All these problems can be resolved with Splinters and Jacoby. No wonder it's better for getting to Game or Slam more accurately.

The cribsheet table above shows you how.

Most experts agree that a responder should have 11-13 high card points for a splinter. With a stronger hand, a responder and opener may be able to make slam on sheer strength. Note: 11-13 for Acol palyers, 10-12HCP hand for SAYC,because SAYC requires 13HCP to open the bidding, whereas Acol only requires 12.

Now try the quiz

Can you put all this into action ? Try the quiz for this subject by clicking on the link at the top left of the page, just below the main menu.
(You can try quizzes for any other subjects too while you're there. Look out for the thin red line).

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Quiz: Barrier-Reversing

Quiz: Deal # Thursday