Scoring: IMP
West opens 1NT showing 13-15.
Most Norths will have a gadget showing spades and another suit. South will give preference to spades and will any North's raise? If North invites, South should raise to game. The fourth trump and outside singleton along with being red at teams should be all that South needs.
If North instead chooses to double, East will take out naturally into clubs. Should south then double for penalties? I think it's a close call, and perhaps too close at teams. I'll let the others tell you how they handled it.

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