B00 Semi-open games

Lemming Defense

Lemming Defense is an ECO B00 opening in the semi-open games family. Study the line, review related variations, and practice the move order.

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Learn this opening

B00 study line

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Step through the line, then test it from memory.

The Lemming Defense reaches a named position after 1 move: 1. e4 Na6

In practical games, this line matters because the early pawn and piece choices decide which middlegame plans are natural. Use the board above to learn the move order, then run the drill without hints before adding the opening to your regular queue.

If this exact branch does not appear in your games, study the related variations below. Openings often transpose, and recognizing the family pattern is more useful than memorizing one narrow sequence.