Method conducted on a computer to verify legal bids in the card game bridge.

Method in the card game bridge (FIG 11) using 4 technical units and a computer, where data about the bridge game using a technical device with a camera is collected and registered from all bidding boxes during a bidding round. A software platform contains a virtual bridge bidding box and uses a special algorithm when checking submitted bids. The method alert players during the bidding round if illegal bids are made. The contract will be calculated in the virtual bidding box and informed to the players when the bidding round has ended. When illegal bids are made using the bidding boxes a signal is sent to the technical device with the option of correcting the illegal bid in question. Communication between players and software platform takes place using a graphical user interface on a computer.