unknown-track - Race 4

Scratch

A horse is a scratch when injury or other necessity causes it to be withdrawn from the race.

Handicap

A race where a handicapper has assigned weights to be carried by all runners on the basis of their past racing efforts.

Rabbit

Also known as a pacemaker; this is a horse with no expected chance of winning but is used to prompt a quick pace on the front end of the race to the benefit of a stablemate who is a closer.