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Modified Jacoby 2NT
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1M
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2NT Artificial and Limit 4+M
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3♣ Artificial; a minimum opener, any shape this includes 15-16 flat hands even though these hands will bid game over a limit raise.
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3♦ Artificial shortness ask with slam interest
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3♥ short clubs
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3♠ short diamonds
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3N short other major
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4x no shortness, forced to control bid cheapest ace or king
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3♦ Balanced or Semi-balanced had with good 16 or better, no singleton or void.
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3♥ (whether suit is hearts or spades) Unspecified shortness, stronger than limit raise as responder didn't splinter initially). Opener can bid 3♠ to ask for shortness or bid game.
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3♠ Ask for short suit
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4♣ Clubs
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4♦ Diamonds
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4♥ other major
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3♠ control in other major
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3N non-serious slam try
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4♣/4♦ control in suit bid, extras
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4M limit raise values with no shortness
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3♥/3♠/3NT artificial, extras, shortness in ♣/♦/OM
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4♣/4♦/4♥ Two suiter, 4♥ shows spades when hearts are trump
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