Response to 1 ♣ opening bid with only 6-9 HCPs.
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When the opening bid is 1 ♣ and the responder has 6+HCPs, the responder has no 1-over-1 restriction. Any new 4+card suit can be proposed at the 1-level. Consequently the responder can bid: 1♦ , 1♥ , or 1♠ .
Keep the bidding as low as possible until the partnership has agreed upon a suit. This leaves bidding room for the opener. If the responder has 17-20 HCPs, the responder can bid a new 4+card suit at the 2-level which indicates a very strong hand yet leaves plenty of bidding room for the opener.
If the responder does not have a 4+card suit to propose, the responder must bid 1NT or 2NT . These bids indicate point count ranges and a flat hand (3-3-3-4) that might play well in a No Trump contract. The responder must not PASS since that would indicate a lower point hand and provide wrong information to the partner.
Keep the bidding as low as possible until the partnership has agreed upon a suit. This leaves bidding room for the opener. If the responder has 17-20 HCPs, the responder can bid a new 4+card suit at the 2-level which indicates a very strong hand yet leaves plenty of bidding room for the opener.
If the responder does not have a 4+card suit to propose, the responder must bid 1NT or 2NT . These bids indicate point count ranges and a flat hand (3-3-3-4) that might play well in a No Trump contract. The responder must not PASS since that would indicate a lower point hand and provide wrong information to the partner.
Respond to 1 ♦ opening bid with only 6-9 HCPs.
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When the opening bid is 1 ♦ and the responder cannot (or does not want to ** ) support the diamonds, the responder with 6-9 HCPs can mention a new 4+card major suit of 1 ♥ or 1 ♠ . These are new suit proposals are at the 1-level which are not forbidden by the 1-over-1 restriction.
** Special Note: If the responder has a new 4+card major suit and a 5+card diamond suit (which could be supported), the responder should ignore the diamonds and propose the 4+card major suit instead. The Yellow Card priority is to explore a major suit contract first. The opener may be holding a 4-card major suit but could not open it.
If the responder has 6-9 HCPS, no diamond support and cannot propose a 4+card major suit, the responder must bid 1 NT . This ARTIFICIAL bid indicates 6-9 HCPs, NO diamond support, and NO 4+major suit to propose. It says says there is a 4+card club suit, but can say nothing about its strength. The responder must NOT PASS since that would indicate a lower point range hand and provide wrong information to the opener.
Respond to 1 ♥ opening bid with only 6-9 HCPs.
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When the opening bid is 1 ♥ and the responder cannot support the hearts, the responder with 6-9 HCPs can only propose a new 4+card spade suit with a bid of 1 ♠ . This new 4+card spade proposal is a 1-level bid which is not forbidden by the 1-over-1 restriction.
If the responder has 6-9 HCPS and no major suit support, the responder must bid 1 NT . This ARTIFICIAL bid indicates 6-9 HCPs with NO a major suit support. It says nothing about the minor suits, and is not a desire to play a No Trump contract. The responder must NOT PASS since that would indicate a lower point range hand and provide wrong information to the opener.
If the responder wants to propose a 4+card suit in clubs or diamonds at the 2-level, the responder must have at least 10+ HCPs. With this higher point count range, the 1-over-1 restriction no longer applies.
If the responder has 6-9 HCPS and no major suit support, the responder must bid 1 NT . This ARTIFICIAL bid indicates 6-9 HCPs with NO a major suit support. It says nothing about the minor suits, and is not a desire to play a No Trump contract. The responder must NOT PASS since that would indicate a lower point range hand and provide wrong information to the opener.
If the responder wants to propose a 4+card suit in clubs or diamonds at the 2-level, the responder must have at least 10+ HCPs. With this higher point count range, the 1-over-1 restriction no longer applies.
Respond to 1 ♠ opening bid with only 6-9 HCPs.
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When the opening bid is 1 ♠ and the responder cannot support the spades (has <3-card spade suit), the responder with only 6-9 HCPs can not propose another 4+card suit.
The responder must bid 1 NT . This ARTIFICIAL bid indicates 6-9 HCPs and no spade support. It says nothing about the other three suit, and is not a desire to play a No Trump contract. The responder must NOT PASS since that would indicate a lower point count hand and provide wrong information to the opener.
If the responder wants to propose a 4+card suit in clubs, diamonds, or hearts at the 2-level, the responder must have at least 10+ HCPs. With this higher point count range, the 1-over-1 restriction no longer applies.
The responder must bid 1 NT . This ARTIFICIAL bid indicates 6-9 HCPs and no spade support. It says nothing about the other three suit, and is not a desire to play a No Trump contract. The responder must NOT PASS since that would indicate a lower point count hand and provide wrong information to the opener.
If the responder wants to propose a 4+card suit in clubs, diamonds, or hearts at the 2-level, the responder must have at least 10+ HCPs. With this higher point count range, the 1-over-1 restriction no longer applies.
