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Denies four spades and is looking for a fit or further information

Shows 10-12 HCP and 4-card heart support; a limit raise

Denotes a weak hand with a 6-card diamond suit and 6-10 HCP

Asks opener for a 4-card major, indicating the responder has at least one 4-card major

Shows 6-9 HCP and denies a 4-card major

Requests opener to bid the next higher suit to show a 5-card suit

Signifies a fit and interest in playing a spade game directly

The fourth suit bid is forcing for one round and asks partner for more information

Typically shows 13-15 HCP and denies a 4-card major suit at a cheaper level

A change of suit at the two-level which is forcing for one round and shows at least 10 HCP

Shows a strong hand with an 8-card spade suit, likely preemptive

Indicates at least 22 HCP or a very strong hand

Shows 20-21 HCP and a balanced hand

Asks partner for the number of aces they hold, typically a move towards slam

Opener rebids 3NT to show a balanced hand and stopping power in other suits, typically 17-19 HCP

Shows 16-18 High Card Points (HCP) and a balanced hand

Indicates a very strong hand with at least 5 clubs, 4 diamonds and 4 spades; looking for the best game or slam

Typically a pre-emptive bid showing a long heart suit and weak hand

A pre-emptive bid suggesting a very long club suit, usually a bid to play