A bid in the suit partner has just bid at more than a minimum level eg 1♠-Pass-3♠ or 1♦-Pass-1♥-Pass-3♥. A jump raise normally shows primary support and more playing strength than a single raise. Example hands for the above sequences are:

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A bid in the suit partner has just bid at more than a minimum level eg 1♠-Pass-3♠ or 1♦-Pass-1♥-Pass-3♥. A jump raise normally shows primary support and more playing strength than a single raise. Example hands for the above sequences are:
