THURSDAY PERMITED BIDDING SYSTEMS

Please note no restrictions on Sims Nights

All modern natural constructive bidding systems are allowed. The following list gives examples of systems and conventions allowed on Thursdays at Wimbledon Bridge Club

System:   Natural 4-card or 5-card systems e.g. Acol, Benjaminised Acol, French Standard, Standard American. Not allowed: Strong Club or other artificial systems.

Opening 1NT: Any 3 or 4 point range between 11 and 18 high card points.  Stayman and Transfers, Extended Stayman.   

Opening Two Bids: Weak or strong. Not allowed: Multi Two Diamond, two-suited weak bids etc.

Over an Opening 2NT:  3 Clubs Stayman or Baron. Transfers.

Defence to 1NT:  Any method permitted at EBU Level 3 or lower.

Jump Overcalls:  Strong, intermediate or weak.

1NT Overcall: 15-17 or 16-18 in direct seat; can be weaker in protective position.

Slam Conventions: Any EBU licensed convention (e.g. Blackwood, Roman Key Card Blackwood, and Gerber)

Two-Suited Overcalls: Unusual No Trump (two lowest unbid suits), Michaels cue bids. Not allowed: Ghestem.

Cue Bids and Splinters:  Allowed.

Action over Opponents' Intervention:  Double for take out (“negative” double) allowed.

Signals & Discards:  Any standard method.

General: Conventional bids must be alerted by the partner of the player making the bid.  Both players in each partnership should have identically completed convention cards which they should make available to opponents on each round. 

The duplicates on these nights are social and intended to be suitable for inexperienced players and newcomers to duplicate. The object of these restrictions is to minimise destructive (as opposed to competitive) bidding.  Players are not allowed to psyche (so please don't!) and calls for the Director should be kept to a minimum.