The card game auction bridge was the third step in the evolution of the general game of bridge. It was developed from bridge whist in 1904, possibly by 1900. Auction bridge was the precursor to contract bridge. Its predecessors were whist and bridge whist. Auction bridge trick scoring, bonus scoring, and penalty scoring are radically different from contract bridge, and there is no concept of vulnerability in auction bridge. Bidding rules are nearly the same, although in contract bridge bidding, many complex artificial bids and bidding systems have evolved.