Early in the history of horse-racing the "weight-for-age" principle was introduced, according to which the weight bor.ie by each horse was proportioned to his age. But it was found that the reputation gained by the fleeter horses prevented competition, and "handicapping" was substituted. Under this system a greater or less weight is assigned to a horse according to his known or presumed powers, but it is very doubtful whether the result is really to place the competitors on the same level. Two-year-olds are not admitted to handicaps; like the three-year-olds they have. races of their own, the most important being the Middle Park Plate, called the "two-year-old Derby," at the Newmarket Second October meeting. The chief handicap races are the Goodwood and Ascot Stakes, the Chester, Ascot, Goodwood, and Manchester Cups, the three Liverpool Cups, the Northumberland Plate, the Czarewitch and Cambridgeshire at Newmarket, the Great Ebor at York, the City and Suburban at Epsom, and the Lincoln Handicap. The Two Thousand and One Thousand Guineas for three-year-olds at Newmarket are run on the same terms as the Derby, Oaks, and St. Leger, for which they are preparatory - i.e. the horses carry equal weights, 8st. 101b. The One Thousand Guineas and the Oaks are confined to fillies ; in the others, which are open to both fillies and colts, the former are given an advantage of 3 lbs.
During the present century horse-racing has made much progress on the Continent, especially in France. The French Derby (Prix du Jockev Club) was established in 1836, the French Oak's (Prix de Diane) in 1843; but the great event of the racing year in France is the Grand Prix de Paris (in June). The sport, finds favour also in Germany and Austria, and is now gaining ground in Italy.
Foreign horses, mostly of English parentage, have often been highly successful on the English turf; thus the French horse Gladiateur won the Two Thousand, Derby, and St. Leger in 1865, and the Derby has since fallen to the Hungarian Kisber in 1876, the French Rayon d'Or in 1879, and the American Iroquois in 1881.
Flat-racing in England is mainly under the direction of the Jockey Club, which is said to have been founded in 1750. Its rules were thoroughly revised in 1889. Besides the ordinary flat-racing there are steeplechasing (q.v.), hurdle-racing, and trotting (q.v.); the last is much in vogue in America. Betting (q.v.) is- an invariable accompaniment of horse-racing in England.