Rᴇʟᴀʏ Sʏꜱᴛᴇᴍꜱ ᴀɴᴅ Mᴏʀᴇ

Delta Club

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Delta Club is an implementation of the Delta idea — that shapely hands should start by showing shortness rather than length, and that these hands should be separated from (semi) balanced hands.

Bidding systems and other resources

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Relay systems, especially Symmetric ones, bidding theory, bridge books, methods of showing and denying honours in relay systems, and other bidding ideas.