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Reverse (bridge)
A reverse, in the card game contract bridge, is a bidding sequence designed to show additional strength without the need to make a jump bid; specifically two suits are bid in the reverse order to that expected by the basic bidding system. Precise methods and definitions vary with country, bidding system and partnership agreements.
In Standard American a reverse is defined by William S. Root as "... a non-jump bid at the two-level in a new suit that ranks higher than the suit you bid first", and by Bridge World. as "a non-jump bid in a new suit that bypasses a bid in a lower-ranking suit already bid by the same player".
The Acol definition is somewhat wider and includes any bid of a new suit by opener higher than two of their first suit.
In the auction, 1♣ – 1♠; 2♥, the 2♥ rebid by opener meets the foregoing definitions and is a reverse showing a stronger than minimum opening hand and forcing responder to bid for one more round.
Responder's bid of 1♠ bypassed bids of 1♦ and 1♥ creating a "gap" in the auction (between the 1♣ and 1♠ bids) thereby implying that responder did not possess four or more in either of those suits. Despite this, opener rebid 2♥, apparently seeking a fit in hearts that is unlikely to exist. This seemingly odd bidding is the "reverse" of what one would expect with a minimum opening hand because such action would compel a responder, who holds a minimum hand for his 1♠ bid but with no hearts and only a few clubs, to return opener to his club suit at the three-level, a result likely to be too high for two minimum hands but not if opener has a strong hand.
One way to identify a reverse is to recognize that a "gap" has been created and that the opener has bid a second suit which lies within the "gap", hearts or diamonds in this example.
Depending on the bidding system, a reverse by opener usually shows a minimum of 16 points or a five-loser hand and at least five cards in the first bid suit.
Opener's reverse may face a weak responding hand with which responder may have intended (over a simple suit rebid) to rebid his own suit or taken a preference to opener's first suit at the two level. Opener's reverse still allows responder to rebid his suit at the two level, but a preference to opener's first suit must be at the three level. Thus, opener's reverse must show values at least one trick beyond the minimum needed to open.
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Reverse (bridge) AI simulator
(@Reverse (bridge)_simulator)
Reverse (bridge)
A reverse, in the card game contract bridge, is a bidding sequence designed to show additional strength without the need to make a jump bid; specifically two suits are bid in the reverse order to that expected by the basic bidding system. Precise methods and definitions vary with country, bidding system and partnership agreements.
In Standard American a reverse is defined by William S. Root as "... a non-jump bid at the two-level in a new suit that ranks higher than the suit you bid first", and by Bridge World. as "a non-jump bid in a new suit that bypasses a bid in a lower-ranking suit already bid by the same player".
The Acol definition is somewhat wider and includes any bid of a new suit by opener higher than two of their first suit.
In the auction, 1♣ – 1♠; 2♥, the 2♥ rebid by opener meets the foregoing definitions and is a reverse showing a stronger than minimum opening hand and forcing responder to bid for one more round.
Responder's bid of 1♠ bypassed bids of 1♦ and 1♥ creating a "gap" in the auction (between the 1♣ and 1♠ bids) thereby implying that responder did not possess four or more in either of those suits. Despite this, opener rebid 2♥, apparently seeking a fit in hearts that is unlikely to exist. This seemingly odd bidding is the "reverse" of what one would expect with a minimum opening hand because such action would compel a responder, who holds a minimum hand for his 1♠ bid but with no hearts and only a few clubs, to return opener to his club suit at the three-level, a result likely to be too high for two minimum hands but not if opener has a strong hand.
One way to identify a reverse is to recognize that a "gap" has been created and that the opener has bid a second suit which lies within the "gap", hearts or diamonds in this example.
Depending on the bidding system, a reverse by opener usually shows a minimum of 16 points or a five-loser hand and at least five cards in the first bid suit.
Opener's reverse may face a weak responding hand with which responder may have intended (over a simple suit rebid) to rebid his own suit or taken a preference to opener's first suit at the two level. Opener's reverse still allows responder to rebid his suit at the two level, but a preference to opener's first suit must be at the three level. Thus, opener's reverse must show values at least one trick beyond the minimum needed to open.