Tree path 3 levels King's Pawn Game › Pirc Defense › Rat Defense: Harmonist
- Chess Codex
- King's Pawn Game B00
- Pirc Defense B00
- Rat Defense: Harmonist B00 you are here
Rat Defense: Harmonist
Overview
Rat Defense: Harmonist is a named branch in the Semi-Open Games group of chess theory, classified under ECO B00.
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 3 plies — specifically the moves 1. e4 d6 2. f4.
In the opening tree, this line branches off from Pirc Defense, part of the broader King's Pawn Game system.
It continues primarily into one named line, Rat Defense: Fuller Gambit.
Use the board to walk through every move, check how the position has scored on Lichess, or take it head-to-head against Stockfish.
- ECO code
- B00
- Group
- Semi-Open Games (B)
- Plies
- 3
- Parent
- Pirc Defense
- Direct variations
- 1
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.
Statistics from Lichess
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Source: Lichess Opening Explorer · cached
Description
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