Suits and shape	Strenght			Slam zone
♠ ♥ ♦ ♣ N suits	15+	F = Forcing	SO = Sign Off	SA = Slam Agreement
▼ minor suit	7–11	NF = Non Forcing	N = Negative
5+♠ 5♠ or more	14..16	GF = Game Forcing	P = Positive	spl = splinter
5..♠ 5♠ or more	– = minimum
6*♥ strong 6♥	+ = maximum			BW = BlackWood
3♠5♥4♦1♣ shape	min = minimum			ExBW = Exclusive BW
3-453-41 shape	max = maximum

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