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Play Bridge: Revisiting the impact of a small slam force

"When a major suit has been agreed upon, a jump to five of that suit is a small slam force."
68854traildailytimesbridgeJan.20272-SmallSlamForceRevisited
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When a major suit has been agreed upon, a jump to five of that suit is a small slam force.

When opponents have bid a suit, it asks partner to bid slam with first or second round control in that suit.

When the opponents have not bid a suit, it asks partner to bid slam with first or second round control in the unbid suit.

When opponents, have not bid a suit, there is no unbid suit or cuebidding has shown controls in the opponent’s or unbid suit, then a jump to five of the major suit, asks partner to bid slam with two of the top three honours, otherwise pass.

The bidding:

South opens One Spade and West pre-empts to Three Clubs. North’s bid of Four Clubs is not a control-showing cuebid. It simply tells partner, that Spades are trump, and he has a limit raise or better.

South jumps to Five Spades, asking North for a Club control. North has one and bids Six Spades.