ChessBase, 2/7/2022. — EAN: 9783866818309. What is the Hippopotamus system of defence? The idea is that, at the beginning of the game, Black develops within his own first three ranks. He constructs a solid, flexible and hopefully stable position, awaiting events. At the right moment, he will strike back! The Hippopotamus was given the name by an eccentric English amateur player...
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