96/05/24
COMPETITION AFTER 1NT OPENING
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
1. vs 1NT Opening
1-1. Unpassed Hand
LHO YOU RHO PTN RHO PTN LHO YOU
1NT ?? 1NT P P ??
Dbl = Penalty Dbl ; 15+, usually (semi-)BAL
2C = Unspecified 1-suiter ; 12+, usually good 6+MAJ/MIN
2D = 12+, 5-5/5-4 MAJ
2H = 12+, 5+HEA & good 4+MIN
2S = 12+, 5+SPA & good 4+MIN
-> 2NT = 18+, good 5-5/6-5 suits
3X = good 7+MAJ/MIN, PRE
3NT = to play
RHO PTN LHO YOU
1NT Dbl P ??
Pass = semi-automatic
2X = weak 5+MAJ/MIN
3X = strong 5+MAJ/MIN, GF
RHO PTN LHO YOU
1NT Dbl 2X ??
Pass = weak hand
Dbl = Negative Dbl ; promises values
2Y/3Y = good 5+MAJ/MIN, NF
1-2. Passed Hand
LHO YOU RHO PTN RHO PTN LHO YOU
P P P P
1NT ?? 1NT P P ??
-> Dbl = 8-11, 5-4 MAJ
2C = Unspecified 1-suiter ; 8-11, usually good 6+MAJ/MIN
2D = 8-11, 5-5 MAJ
2H = 8-11, 5+HEA & good 4+MIN
2S = 8-11, 5+SPA & good 4+MIN
2. After 1NT Opening
2-1. Natural Overcall
PTN LHO YOU RHO
1NT Dbl ??
-> Pass = to play
-> Redbl = to play
-> 2X = weak 5+MAJ/MIN
-> 2NT = weak 5-5 MIN
-> 3X = weak 6+MAJ/MIN
PTN LHO YOU RHO
1NT 2C ??
Dbl = Penalty Dbl
2D/2H/2S = 5+DIA/HEA/SPA, NF
2NT = Lebensohl ; transfer to 3C
--3C --Pass = weak 5+CLU
--3D/3H/3S = good 5+DIA/HEA/SPA, INV
--3NT = to play, with CLU STP
3C = Stayman ; promises 4 HEA/SPA
3D/3H/3S = 5+DIA/HEA/SPA, GF
3NT = to play, no CLU STP
4C = Gerber
4D/4H = Texas transfer to 4H/4S ; promises 6+HEA/SPA
PTN LHO YOU RHO
1NT 2H ??
Dbl = Penalty Dbl
2S = 5+SPA, NF
2NT = Lebensohl ; transfer to 3C
--3C --Pass = weak 5+CLU
--3D = good 5+DIA, NF
--3H = Stayman ; promises 4 SPA, with CLU STP
--3S = good 5+SPA, INV
--3NT = to play, with CLU STP
3C/3D/3S = 5+CLU/DIA/SPA, GF
3H = Stayman ; promises 4 SPA, no CLU STP
3NT = to play, no CLU STP
4C = Gerber
4D = Texas transfer to 4H ; promises 6+HEA
2-2. Artificial Overcall
PTN LHO YOU RHO
1NT 2C ??
Dbl = Stayman ; same as without
2D/2H = Jacoby transfer to 2H/2S ; same as without
2S = Minor Suit Stayman ; same as without
2NT = transfer to 3C ; same as without
3C/3D = good 6 CLU/DIA, INV, same as without
3H/3S = Short Suit Warning ; same as without
3NT = to play
4D/4H = Texas transfer to 4H/4S ; promises 6+HEA/SPA