The card game bridge has what seems to be a complicated bidding system at first glance. This is a list to simplify the game, simplifying the system to four types of bids.

  1. Bid - Offer to win a number of "odd tricks" in excess of 6 (first 6="book")
  2. Pass - No bid
  3. Double - Increase scoring value
  4. Redouble - Further increasing the scoring value of the trick