Analysis included 232 horses starting in the eventing competition of the highest class C in Poland in 2004–2008. In total, 711 starts were analysed allowing for horse breed, ancestor breed (sire and dam), and horse sex and age. The Polish noble half-bred horses had the largest frequency, achieving the best results in all tests, i.e. dressage, cross-country and show jumping. A specialisation trend in the eventing, particularly in cross-country test, was observed in case of half-bred Anglo-Arabian horses. The worst results obtained the Wielkopolski horses and those with the Wielkopolski horse ancestry. The best results were achieved by the offspring of Anglo-Arabian and the Małopolski stallions and noble half-bred mares.

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