Hippopotamus Defense

A first-move knight to the rim. The bluntest possible doorway into the low, patient, spring-loaded Hippopotamus family.

1...Nh6 develops a piece technically to the one square your first coach told you to avoid. But the move has a family behind it: the Hippopotamus. This is the school of setups where Black keeps every pawn modest, tucks the pieces inside a compact shell, and waits for White to overreach. From h6 the knight has a real square in mind: f7, one hop away. There it guards the king's neighborhood and supports a later ...e5. The classic Hippo usually arrives by quieter move orders. This is the version that announces itself at the door.

The Hippo's credibility peak is well documented. Boris Spassky used its setups in his 1966 World Championship match against Petrosian. A different move order, but the same animal, and it held up on the biggest stage the game has. The 1...Nh6 version adds an immediate dare: at some point White can consider taking on h6 to damage the shell. Black must decide whether a wrecked pawn front is fair payment for the bishop pair and an open g-file. Some Hippo players want exactly that argument. Most opponents have never had it.

In practice this is an anti-theory weapon and the terms of the deal are honest: White will get a big center for free, and Black bets the game on the shell absorbing it. The database adds a pointed footnote: White's timid setups do noticeably worse than the principled ones. If you face 1...Nh6, take the center. If you play it, that is exactly what you are hoping White won't do.