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Key Card Swiss |
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Keycard Swiss is just one of the conventions intertwined in the Raising Partner's major suit opening section of this web site. |
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It is defined as a jump to 4♣ or 4♦ over partner's 1♥/♠ opening.
It is 12-15 points with 4 card (can be 5 card) support for partner. With a hand of 16+ points it's best to use the Jacoby 2NT convention. The distinction between the 4♣ and 4♦ bids is as follows: - |
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4♣ = Two key cards + a feature. The feature may be one of the following: - |
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| -1- |
A third key card |
| -2- |
The queen of trumps |
| -3- |
a singleton |
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After the 4♣ bid, opener may sign off in 4 of the agreed major if he has a weak hand. With slam ambitions, he normally enquires about responder's feature as follows: - |
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| After a 1♥ - 4♣ , 4♦ enquires: - |
After a 1♠ - 4♣ , 4♦ enquires: - |
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| 4♥ |
= the ♥Q |
4♥ |
= singleton ♥ |
| 4♠ |
= singleton ♠ |
4♠ |
= the ♠Q |
| 4NT |
= a 3rd key card |
4NT |
= a 3rd key card |
| 5♣ |
= singleton ♣ |
5♣ |
= singleton ♣ |
| 5♦ |
= singleton ♦ |
5♦ |
= singleton ♦ |
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If responder has a game forcing hand with a singleton he could have shown it directly by splintering. However, should he happen to have 12-15 points and two key cards, it is more descriptive to use Key Card Swiss. Should he have a void, then it is better to show it directly by splintering (Ambiguous Splinter) whatever the point range, so a shortage bid shown by Key Card Swiss is always a singleton. |
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Example 1 |
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| West |
East |
West |
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East |
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(1) Key Card Swiss |
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(2) feature? |
| ♠ |
KQ653 |
♠ |
AJ42 |
1♠ |
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4♣ |
(1) |
(3) singleton ♥ |
| ♥ |
J85 |
♥ |
3 |
4♦ |
(2) |
5♥ |
(3) |
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| ♦ |
KJ9 |
♦ |
AQ86 |
6♠ |
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pass |
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| ♣ |
AK |
♣ |
Q432 |
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Example 2 |
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| West |
East |
West |
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East |
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(1) Key Card Swiss |
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(2) feature? |
| ♠ |
KQ653 |
♠ |
AJ42 |
1♠ |
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4♣ |
(1) |
(3) singleton ♣ |
| ♥ |
J85 |
♥ |
Q432 |
4♦ |
(2) |
5♥ |
(3) |
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| ♦ |
KJ9 |
♦ |
AQ86 |
6♠ |
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pass |
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| ♣ |
AK |
♣ |
3 |
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Example 3 |
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| West |
East |
West |
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East |
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(1) Key Card Swiss |
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(2) feature? |
| ♠ |
K10653 |
♠ |
Q742 |
1♠ |
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4♣ |
(1) |
(3) trump queen |
| ♥ |
K85 |
♥ |
AQ32 |
4♦ |
(2) |
4♠ |
(3) |
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| ♦ |
KJ9 |
♦ |
AQ8 |
6♠ |
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pass |
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| ♣ |
AK |
♣ |
63 |
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Example 4 |
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| West |
East |
West |
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East |
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(1) Key Card Swiss |
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(2) not interested |
| ♠ |
K8653 |
♠ |
Q742 |
1♠ |
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4♣ |
(1) |
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| ♥ |
K85 |
♥ |
AQ32 |
4♠ |
(2) |
pass |
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| ♦ |
KJ9 |
♦ |
AQ8 |
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| ♣ |
K7 |
♣ |
63 |
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Now what about the direct 4♦ Swiss bid? After a 1 ♥/♠ opening: - |
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| 4♦ |
= |
4 card support, 12-15 points but lacking the requirements for 4♣. |
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After the 4♦ bid, opener may sign off in 4 of the agreed major if he has a weakish hand. With slam ambitions, he may cue bid or enquire about partner's key cards. |
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Example 5 |
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| West |
East |
West |
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East |
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(1) Key Card Swiss |
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| ♠ |
KQ653 |
♠ |
J742 |
1♠ |
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4♦ |
(1) |
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| ♥ |
J85 |
♥ |
A43 |
4♠ |
(2) |
pass |
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| ♦ |
KJ9 |
♦ |
AQ8 |
6♥ |
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| ♣ |
AK |
♣ |
Q63 |
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| (2) |
Here the West hand is not good enough to look for slam. There is a key card missing and also probably a ♥ loser or two. |
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| Example 6 |
But with a stronger hand West can make a try: - |
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| West |
East |
West |
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East |
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(1) Key Card Swiss |
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(2) RKCB |
| ♠ |
KQ653 |
♠ |
J742 |
1♠ |
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4♦ |
(1) |
(3) 2 key cards |
| ♥ |
K85 |
♥ |
A43 |
4NT |
(2) |
5♥ |
(3) |
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| ♦ |
KJ9 |
♦ |
AQ8 |
6♥ |
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pass |
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| ♣ |
AK |
♣ |
Q63 |
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| Example 7 |
Give East a less suitable hand and we can stay low: - |
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| West |
East |
West |
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East |
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(1) Key Card Swiss |
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(2) RKCB |
| ♠ |
KQ653 |
♠ |
J742 |
1♠ |
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4♦ |
(1) |
(3) 1 key card |
| ♥ |
K85 |
♥ |
QJ3 |
4NT |
(2) |
5♦ |
(3) |
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| ♦ |
KJ9 |
♦ |
AQ8 |
5♥ |
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pass |
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| ♣ |
AK |
♣ |
QJ3 |
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Pattaya Bridge Club - |
www.pattayabridge.com |
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