Bridge bidding systems abound in the bridge community and in the bridge communities of the world. Acol and Five Card Major bidding systems are not the only bidding systems. In The Netherlands, as the name more than strongly indicates, one of the bidding systems devised and employed was the Amsterdam Club System. The originators of this bidding system remain unknown.

Note: Source was found on the Internet. Any additional information would be greatly appreciated.

Note: The Amsterdam Club System was frequently employed in The Netherlands in earlier times, but the popularity rating fell rapidly after new methods were introduced. This bidding system is presently considered obsolete. This presentation is presented and preserved only for historical purposes.

Opening Bids Only

Opening		Values		Meaning
1		17 plus high card points		Forcing for one round without competition.
1		12 to 16 high card points		A Diamond opening bid shows fewer than 4 Hearts.
1		12 to 16 high card points		A canapé with Clubs or Diamonds.
1		12 to 16 high card points		A canapé with Clubs.
1 NT		15 to 17 high card points		Shows a balanced holding.
2		12 to 16 high card points		Shows a solid suit with possible second suit.
2		Artificial		Multi 2 opening.
2		Roman System		Roman System
2		Artificial		Roman System
2 NT		Artificial		Promises possession of both Minor suits.
3		in either 1st or 2nd position		Shows a solid 6-card Club suit with outside stoppers.
3		in either 1st or 2nd position		Shows a solid 6-card Diamond suit with outside stoppers.
3 NT		Artificial		Shows a solid suit, no outside stoppers.
4		Artificial, also Namyats		Transfer to Hearts.
4		Artificial, also Namyats		Transfer to Spades.

The bridge players in The Netherlands, who use this Amsterdam Club System, often use relay bids. This allows the responder and the opener to exchange a more accurate description of the card holding, and therefore a set of guidelines describing the bidding process and the significance of any particular bid would be almost impossible to relate.

These relay bids carry certain specific, systemic meanings peculiar to the bidding system and are sometimes understood only by the partnership. As mentioned, this presentation serves only to record this particular bidding system.

If you wish to include this feature, or any other feature, of the game of bridge in your partnership agreement, then please make certain that the concept is understood by both partners. Be aware whether or not the feature is alertable or not and whether an announcement should or must be made. Check with the governing body and/or the bridge district and/or the bridge unit prior to the game to establish the guidelines applied. Please include the particular feature on your convention card in order that your opponents are also aware of this feature during the bidding process, since this information must be made known to them according to the Laws of Duplicate Contract Bridge. We do not always include the procedure regarding Alerts and/or Announcements, since these regulations are changed and revised during time by the governing body. It is our intention only to present the information as concisely and as accurately as possible.