a dutch warmblood is a warmblood type of horse registered with the koninklijk warmbloed paardenstamboek nederland (royal warmblood studbook of the netherlands (kwpn), which governs the breeding of competitive dressage and show jumping horses, as well as the show harness horse and gelderlander, and a hunter studbook in north america. developed through a breeding program that began in the 1960s, the dutch are some of the most successful competition horses developed in postwar europe.