| 1. |
Opening bid is 1m and responder bids 1♥. |
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| 1♣ - 1♥ - 1NT - 2♦ |
In both of these cases, responder's second bid is NMF, asking partner to define his ♥ holding and strength, where min is 12-poor 13 and max is good 13-14. Responses are: - |
| 1♦ - 1♥ - 1NT - 2♣ |
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| 2♥ |
= |
3 ♥'s, min |
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| 3♥ |
= |
3 ♥'s, max |
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| 2♠ |
= |
2 ♥'s, min |
denies a ♠ stop (the impossible ♠) |
| 3♠ |
= |
2 ♥'s, max |
denies a ♠ stop (the impossible ♠) |
| 2NT |
= |
2 ♥'s, min |
shows a ♠ stop |
| 3NT |
= |
2 ♥'s, max |
shows a ♠ stop |
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There is one other possibility: - |
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1♦ - 1♥ - 1NT - 2♣ - ♦ is minimum, showing 5 ♦'s and just two ♥'s. |
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| 2. |
Opening bid is 1m and responder bids 1♠. |
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Here the situation is somewhat more complex as responder may have 4 ♥'s. So opener has to be able to show if he has 3 ♠'s, 4 ♥ 's and also strength! If opener has both 3 ♠'s and 4 ♥'s, priority is given to showing the 4 card ♥ suit. This is not just because a possible 4-4 ♥ fit is usually preferable to a 5-3 ♠ fit, but there is room to subsequently find a 5-3 ♠ fit if there is no ♥ fit. |
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| 1♣ - 1♠ - 1NT - 2♦ |
In both of these cases, responder's second bid is NMF, asking partner to define his major suit holdings and strength. |
| 1♦ - 1♠ - 1NT - 2♣ |
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| 2♥ |
= |
4 ♥'s, min |
may or may not have 3 ♠'s |
| 3♥ |
= |
4 ♥'s, max |
may or may not have 3 ♠'s |
| 2♠ |
= |
3 ♠'s, min |
denies 4 ♥'s |
| 3♠ |
= |
3 ♠'s, max |
denies 4 ♥'s |
| 2NT |
= |
min |
denies 4 ♥'s and 3 ♠'s. |
| 3NT |
= |
max |
denies 4 ♥'s and 3 ♠'s. |
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Again there is one other possibility: - |
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1♦ - 1♠ - 1NT - 2♣ - 2♦ is minimum, showing 5 ♦'s and denying 3 ♠'s or 4 ♥'s. |
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| 3. |
It is also possible to play NMF after a 1♥ opening |
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1♥ - 1♠ - 1NT - 2♣/♦ is played as NMF by some, with the minor chosen being the better. |
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| 4. |
NMF after a jump 2NT response. |
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After a sequence 1x – 1M – 2NT then a bid of a new minor by responder is NMF and game forcing and opener should show 3-card support for partner's major or 4 cards in the unbid major. Note that the situation is slightly different here as when responder bids 1♥ then a 2NT rebid by opener does not deny 4 ♠'s. Also all sequences are game forcing and opener does not need to show strength as he has already shown 18-19. |
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Examples: - |
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| 1♣ - 1♥ - 2NT - 3♦ - 3♥ |
shows 3 ♥'s and possibly 4 ♠'s. |
| 1♣ - 1♥ - 2NT - 3♦ - 3♠ |
shows 4 ♠'s and denies 3 ♥'s. |
| 1♣ - 1♥ - 2NT - 3♦ - 3NT |
denies both 3 ♥'s and 4 ♠'s |
| 1♣ - 1♠ - 2NT - 3♦ - 3♥ |
shows 4 ♥'s and possibly 3 ♠'s. |
| 1♣ - 1♠ - 2NT - 3♦ - 3♠ |
shows 3 ♠'s and denies 4 ♥'s. |
| 1♣ - 1♠ - 2NT - 3♦ - 3NT |
denies both 4 ♥'s and 3 ♠'s. |
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It's the same with ♣'s and ♦'s reversed, with the one additional sequence |
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1♦ - 1♠ - 2NT - 3♣ - 3♦ showing 5 ♦'s and denying 3 ♠'s or 4 ♥'s. |
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Playing in the other minor |
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| ♠ |
75 |
Partner opens 1♦ and you bid 1♥. Partner rebids 1NT and you want to play in ♣'s, but unfortunately 2♣ is NMF. So you bid have to 3♣. |
| ♥ |
Q953 |
| ♦ |
6 |
This is a weak bid playing NMF, showing 6 of the minor and asking partner to pass. This weak jump bid needs to be alerted. |
| ♣ |
KQ8643 |
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| Note: These pages are just a simple example of the NMF convention, there are dozens of variations, treatments and extensions. |
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