Baritsu was the name given to the martial arts used by Sherlock Holmes to defeat Moriarty as described by Conan Doyle, the author of Sherlock Holmes. A misprint or perhaps a deliberate misspelling, Baritsu is correctly known as Bartitsu, a scientific mixed martial art developed in England in 1898–1902 by Edward William Barton-Wright.

Further reading

The core tactics of Bartitsu

About Bartitsu

Learning Bartitsu

Bartitsu on Wikipedia