Group races, also known as Pattern races, or Graded races in some jurisdictions, are the highest level of races in Thoroughbred horse racing. They include most of the world's iconic races, such as the Derby, Irish Derby and Prix de l'Arc de Triomphe in Europe, the Melbourne Cup in Australia, and the Kentucky Derby and Breeders' Cup races in the United States. Victory in these races marks a horse as being particularly talented, if not exceptional, and they are extremely important in determining stud values. They are also sometimes referred to as Black type races, since any horse that has won one of these races is printed in bold type in sales catalogues.[1]
The International Grading and Race Planning Advisory Committee (IRPAC), part of the International Federation of Horseracing Authorities (IFHA), enforces quality standards for the designation of group and graded races internationally.[2]