The HIPPO System: A Universal Chess Opening for White & Black by

Alessio de Santis - The Hippopotamus Defence: A Deceptively Dangerous Universal Chess Opening System for Black (K

Hippopotamus Defence - Wikipedia

Hippopotamus Defence

The Hippopotamus Defence

The Modernized Modern Defense - Daniel Fernandez

Watch 87 - Highly Instructive and Educational Games for The Scotch Player Online

The Hippopotamus Defence - Schachversand Niggemann

Foxy Openings - The White Lion - Im Andrew Martin - Volume 189

New in Chess

This expanded (4th) edition of the Hippo System is a tribute to Augustus Mongredien, the apparent founder of the initial hippo system. The book

The Hippo System: A Universal Opening System for White and Black - Mongredien Edition

What black chess opening can I use regardless of white's opening? - Quora

Hippopotamus Defence

What chess openings, for both white and black, should a beginner learn? - Quora