Tree path 5 levels King's Pawn Game › Pirc Defense › Pirc Defense › Pirc Defense › Lion Defense
B07

Lion Defense

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Overview

Lion Defense is a specific line in the Semi-Open Games family (ECO B07), arising from a recognised theoretical position.

The Semi-Open Games group covers semi-open games — replies to 1.e4 where Black declines the symmetrical 1…e5 in favour of an asymmetric pawn structure.

The line arises from 6 plies — specifically the moves 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7.

The line refines Pirc Defense, which traces back to the root opening King's Pawn Game.

The line splits into 2 documented sub-systems: Anti-Philidor, Bayonet Attack.

Together the deeper variations number 4 across the full subtree.

Explore the position on the interactive board, study its real-world results from Lichess, and challenge the engine when you are ready.

ECO code
B07
Group
Semi-Open Games (B)
Plies
6
Parent
Pirc Defense
Direct variations
2
Total in subtree
4

This overview is generated automatically from the opening's metadata. A more detailed, human-written description is on the way — and you can speed it up by suggesting one yourself.

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Variations (2)

Show all 4 sub-variations (full subtree)