The Thoroughbred has been shaped by a relatively small number of exceptional stallions whose influence extends far beyond their own racing careers. These horses, known as chefs-de-race, form the foundation of one of the most influential systems ever developed for understanding pedigree and inherited aptitude.

Chef-de-Race.com.au has been established as an independent reference dedicated to documenting those influential stallions, preserving the history of the Chef-de-Race concept, and publishing both the International and Australasian classifications for the modern Thoroughbred.

Whether you are a breeder, owner, pedigree analyst, bloodstock professional or simply a student of the Thoroughbred, our objective is to provide a reliable, continually updated resource that explains not only who the great influences are, but why they matter.

Explore the Site

International Chef-de-Race Classifications

The complete list of internationally recognised Chefs-de-Race, including the latest classifications.

View International Classifications →

Australasian Chef-de-Race

The complete Australian and New Zealand classifications recognising the stallions that have shaped our unique Southern Hemisphere breed.

View ANZ Classifications →

Featured Stallions

Profiles of the great breed-shaping stallions, their classifications, influence and legacy.

Browse Stallion Profiles →

History of the Chef-de-Race System

Discover the work of Lieutenant-Colonel J. J. Vuillier, Franco Varola, Dr Steven Roman and John Hutchinson, whose research transformed our understanding of the Thoroughbred.

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The 2026 Classification Update

The Thoroughbred continues to evolve, and so too must the Chef-de-Race classifications. This website publishes the latest International and Australasian updates, recognising emerging sire influences while preserving the integrity of the original principles established by Vuillier, developed by Varola and expanded by Dr Steven Roman. Our Australasian classifications continue the important work initiated by John Hutchinson in recognising the distinctive development of Australian and New Zealand bloodlines.

Read the Latest Classification Update →

More Than Numbers

Dosage calculations have made the Chef-de-Race system familiar to breeders and racing enthusiasts around the world, but the classifications were never intended to be viewed simply as mathematics. They represent generations of observation into how influential stallions consistently transmit inherited aptitudes through the Thoroughbred.

Understanding those influences requires more than a Dosage Index. It requires an appreciation of history, pedigree, physical type, performance and the continuing evolution of the breed itself.

The numbers tell part of the story.

The horses tell the rest.

Part of the Turf Monthly Research Network

Chef-de-Race.com.au forms part of the Turf Monthly Research Network, an independent collection of specialist websites dedicated to the history, pedigree, breeding and analysis of the Thoroughbred.

Turf Monthly
Exploring the history, heritage and future of the Thoroughbred.

Dosages
Comprehensive dosage profiles, dosage indexes and pedigree analysis.

Dosage Profile
Research, interpretation and the continuing evolution of dosage theory.

Progold Thoroughbreds
Independent pedigree, biomechanical and bloodstock analysis.

Discover how each resource contributes to a broader understanding of the Thoroughbred.