Graphic from the SABBS Illustrated Breed Standard Terminology sheet. How many numbers can you correctly identify? (Scroll down to the bottom of the story for answers.)
This South African assessment is a worthwhile tool for understanding a dog’s strengths and weaknesses.
The Bullmastiff was once the guard dog of choice in South Africa's De Beers diamond mines. What happened?

AKC-registered Boerboel must have pedigrees that pass a litmus test.
Can you get your South African-bred Boerboel registered with the American Kennel Club? It depends on what's in that pedigree.
Among all the Molossers, the Boerboel arguably has the most unfixed type. One way to think of the breed is the middle ground between the Bullmastiff and Dogue de Bordeaux.
A Bullmastiff with no tail? A larger Cane Corso? A Shar-Pei on steroids? No, it's a Boerboel, and those unfamiliar with the breed have a large learning curve.
An avid sportsman goes in search of a Molosser whose instincts are still intact. Then he finds the Boerboel.

Developed as an all-purpose farm dog, the Boerboel is strong boned and confident.
Are black Boerboels a rare color that needs preservation, or evidence of crossbreeding? The debate about this rustic South African Molosser rages on. 
As this South African mastiff becomes recognized by the American Kennel Club, a primer on the fine points of the breed.
On January 1, 2011, the American Kennel Club formally admitted two Molosser breeds, the Dogo Argentino and the Boerboel, into its Miscellaneous Group, the final step before formal recognition. Here, representatives from each parent club answer some questions from Modern Molosser.