Abstract: A computer system permitting cancellation of wagers on pending events includes a wager cancellation link, which when enabled, permits the user to cancel their wager prior to the occurrence of the pending event, such as a horse race. The wager cancellation link may be enabled for users who do not have a history of excessive cancellation of wagers, measured either by number of cancellations or by a dollar value of cancelled wagers. The wager cancellation link may also be enabled for certain events occurring at certain venues. A wager cancellation limitation disables the wager cancellation link when the limitation has been violated. The computer system credits the user's account with the value of the cancelled wager in response to cancellation of the wager.

Abstract: A system and method for relaying race information related to a plurality of races, such as horse or greyhound races, typically held at racetracks. The system includes a computer system that receives and stores current race information from the plurality of races. The system also includes a remote device coupled to the computer system. A user operating the remote device can view race information and place wagers on the races. The method begins by the computer system sending initial race information to the remote device. As current race information is received from the racetracks, the computer system compares current race information with the initial race information sent to the remote device. The computer system then sends updated race information to the remote device. This updated race information includes only race information that has changed since the initial race information was sent from the computer system to the remote device.