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Negative 1

1-1-ART NEG, 0–7
P16–18, 4–5
1!F, 2+
116–23, 4+ or UNBAL INV 3+
1NT17–19, 2–4, 2–4, 2–6, 2–6
216–20, 5+, 0–3, 0–3
216–20, 5+, 0–3, 0–3
216–20, 5+, 4+
221–23, 5+
2NTFG, 0–5, 0–5
321–23, 6+, 0–3, 0–3
321–23, 6+, 0–3, 0–3
3!FG, 4+, 5+
3FG, 6+
3NT!UNT choice of games, 5+, 5+

Dutch doubleton 1

1-1-1-F, 2+
1!NF ART NEG, 0–3, 0–5, 0–5
1NTMAX, 4–7, 0–4, 0–2
2!MAX, 4–7, 5+, 0–3
2!MAX, 4–7, 3=
2MAX, 4–7, 4=
2PRE, 0–3, 6+
2NT!MAX, 4–7, 5=
3!SPL, 4–7, 0–1#, 5=
3PRE, 0–3, 6+
3NT!MAX, 4–7, 6+
3!, 4!SPL, 4–7, 0–1#, 6+
1-1; 1-1-NF, 0–3
P16–21, 4=, 2–4
1NT16–21, 2–4, usually BAL
2!F, 4+, and 5+ if 16–20
216–20, 5+, 4+
2!16–20, 5+, 4+
2!FG, 5+
2NT22–24, 2–3, usually BAL
321–23, 4=, 5+
321–23, 4=, 5+
321–23, 7+