Chess opening · ECO B00
Hippopotamus Defense
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1. e4 Nh6
Hippopotamus Defense is catalogued under ECO code B00. It is reached after 1 move (2 half-moves): 1. e4 Nh6. After the last move it is White to play. White opens 1. e4. It is the defining line of the Hippopotamus Defense family, which has 2 catalogued lines in total.