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Natural 1

  • MIN (11–13): 4+ but not 4333 or 44(xx)
  • MAX (13–15): 5+ or unbalanced 4= 5+

Inspired by Twisted 2/1, the suits for 2 are swapped.

1-11–15, 4+
1NTNF CONSTINV, 0–3
2!FG, 4+. CONST, 5=. Any 6+.
2!FG, 4+ but not 4=. INV, 5+, 3= or 6+.
2!FG, 4+ but not 4=. INV, 5+, 3= or 6+.
2PRE, 4+. CONST, 3=.
2NT!INV+, 4+
3!SPL, INV or S/T, 0–1#, 4+
3!INV, 6+, 3=
3CONST, 4–5
3NT!Choice of games, 3(433)
4X!S/T SPL, 0–1#, 4+
4S/O
4NT!RKCB 1430

By passed hand

New suits by passed hand are completely natural. It limits the benefit of the 2 transfer to hearts that responder fails to preempt. The natural 2 also proposes a reasonable contract. Raises become more constructive because everyone had a chance to bid.

Opener can pass invitations with a mimimum 7–8-card fit. The unlisted rebids below 3NT are natural game forces.

P-1-11–15, 4+
2XINV, 5+#
2CONST, 3+
3INV, 4+
P-1-2INV, 5+
2!MIN, 5=
2MIN, 4+, 5+
2MIN, 6+
3MIN, 3+, 4=
P-1-2INV, 5+
2!MIN, 5=
2MIN, 6+
3MIN, 3+, 4=
P-1-2INV, 5+
2MIN, 6+
2NTMIN, 5=
3MIN, 3+