1NT
1♠
1♥
1♦
2NT
2♠
2♥
2♦
2♣
3NT
3♠
3♥
3♦
3♣
4NT
4♠
4♥
4♦
4♣
5NT
5♠
5♥
5♦
5♣
6NT
6♠
6♥
6♦
6♣
7NT
7♠
7♥
7♦
7♣
No sequence/opp roots
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Root: 1♣
Current Sequence
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Sequence
1♣OUR-O1
12–21 HCPNFBase opening. Includes weak NT without major.
→1♦OUR-R1
5+ HCPF1
→1♥OUR-O3
11–16 HCPNF
→1♠OUR-R
10+ HCPF1
→1NTOUR-R
6–10 HCPNFWeak/medium NT response without fit
→2♦OUR-R
5–9 HCPNF
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