IBR Lesson 4 : Deal 36
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IBR 36 : Dealer is W     None Vulnerable     RKC ask with switch option
West* ♠ 3 ♥ 6 ♦ A K 10 9 6 4 2 ♣ A Q J 10	Next	East ♠ A 4 ♥ 7 5 3 ♦ J 8 7 5 ♣ K 9 7 3
	N E S W       1♦ DBL 2♦ 2♠ 4♦ 4♠ Pass* - 6♦ - Pass -
* DOPI :   DBL = 0    Pass = 1 key card