| Opener bids a new suit: - |
Examples: - |
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| Non-jump bids are non forcing |
1♣ - 1♥ - 1♠ |
or 1♥ - 1♠ - 2♣ |
| Jump bids are forcing |
1♣ - 1♥ - 2♠ |
or 1♥ - 1♠ - 3♣ |
| A reverse is strong, some (most) say forcing |
1♣ - 1♥ - 2♦ |
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| A reverse after a 2 level response is game forcing |
1♥ - 2♦ - 2♠ |
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| A new suit at the three level is game forcing |
1♥ - 2♦ - 3♣ |
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Opener repeats his suit: - |
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| Non-jump rebids are weakish |
1♦ - 1♠ - 2♦ |
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| Non-jump rebids are weakish |
1♦ - 2♣ - 2♦ |
* 1 |
| Jump rebids are stronger but non forcing |
1♦ - 1♠ - 3♦ |
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| A jump after a two level response is forcing |
1♥ - 2♣ - 3♥ |
* 2 |
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| Opener supports partner: - |
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| Non-jump support is weakish (about 12-14) |
1♣ - 1♠ - 2♠ |
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| Jump support is invitational (about 15-17) |
1♣ - 1♠ - 3♠ |
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| Jumping to 4♥/♠ shows 4 card support & 18-19 pts |
1♣ - 1♠ - 4♠ |
or 1♦ -1♥ -4♥ |
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Responder's Bids: - |
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| Raising opener is non-forcing (about 6-9) |
1♠ - 2♠ |
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| A jump raise of opener is invitational (about 11-12) |
1♠ - 3♠ |
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| Raising 1♥/♠ to 4♥/♠ is pre-emptive (5 cards) |
1♠ - 4♠ |
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| A new suit is forcing, 6+ points |
1♦ -1♥ |
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| A new suit at the two level is forcing, 10+ points |
1♥ -2♦ |
* 3 |
| A jump shift shows a good suit and is game forcing |
1♦ -2♥ |
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| A repeated suit is weakish
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1♦ -1♥ -2♣ - 2♥ |
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but after opener repeats it is mildly encouraging |
1♦ -1♥ -2♦ - 2♥ |
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and after a jump by opener it's forcing |
1♦ -1♥ -3♦ - 3♥ |
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| A repeated suit jump is highly invitational |
1♦ -1♥ -2♦ - 3♥ |
or 1♦ - 1♥ - 2♣ -3♥ |
| A reverse by responder is forcing |
1♦ - 2♣ -2♦ -2♠ |
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| Any new suit is not strictly forcing (it's rarely passed)... |
1♦ -1♠ -2♦ - 2♥ |
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but a jump is forcing |
1♦ -1♠ -2♦ - 3♥ |
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and a new suit at the 3 level is forcing |
1♥ -2♦ -2♥ - 3♣ |
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| Minimal support (preference) for opener is weak 6-9 |
1♥ -1♠ -2♦ - 2♥ |
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| Jump support is invitational (+- 11) |
1♥ -1♠ -2♦ - 3♥ |
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| Jump to game on the 2nd round is strong |
1♥ -1♠ -2♦ - 4♥ |
or 1♥ - 2♣ - 2♦ - 4♥ |
A bid after responding 1NT is weak |
1♥ -1NT - 2♣ - 2♦ |
| ... 2♦ is a long suit in a weak hand - to play |
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| Opener's rebid is No Trump: - |
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| The 1NT rebid is 12-14 |
1♥ -1♠ -1NT |
. * 4 |
| ... and so a simple rebid by responder is weak |
1♥ -1♠ -1NT - 2♠ |
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and a jump rebid by responder is invitational |
1♥ -1♠ -1NT - 3♠ |
. * 5 |
| A new suit by responder is weak: pass or correct |
1♦ -1♠ -1NT - 2♥ |
. * 6 |
| Supporting partner's minor here is forcing |
1♦ -2♣ -2NT - 3♦ |
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| Supporting partner's major here is invitational (3 card) |
1♠ -2♣ -2NT - 3♠ |
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| Anything is forcing after a 2NT rebid |
1♦ -1♠ -2NT - 3♦ |
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This last one is up to you, but I play that any bid after the strong 2NT rebid is game forcing, the only weak bid being pass. |
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| Responder Rebids his major: - |
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| This jump 3♠ rebid is invitational |
1♦ -1♠ -1NT - 3♠ |
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| To make the 3♠ bid forcing, use CBS or NMF: |
1♦ -1♠ -1NT - 2♣ - any - 3♠ |
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Some differences when playing a weak No Trump : - |
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| A new suit at the 2 level is forcing, 8+ points |
1♥ - 2♣ |
* 3 |
This is an important difference when playing a weak No Trump, the response is just 8+ |
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| Non-jump rebids are weakish and can be passed |
1♦ - 2♣ - 2♦ |
* 1 |
| Playing a Strong NoTrump, most players play that responder promises another bid. |
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| A jump after a two level response |
1♥ - 2♣ - 3♥ |
* 2 |
This is forcing in Standard American but in Acol the 2♣ response promises only 8 points and some players play the sequence as non-forcing. |
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| The 1NT rebid is 15-16 |
1♦ -1♠ -1NT |
.* 4 |
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| ... and so a jump rebid by responder is forcing |
1♦ -1♠ -1NT - 3♠ |
.* 5 |
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| A new suit by responder is weak, but ... |
1♦ -1♠ -1NT - 2♥ |
.* 6 |
as the NoTrump rebid is 15-16 opener may press on with good ♥ support. |
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- James Jacoby