Rat Defense: Balogh Defense
The Balogh Defense of the Rat is 1.e4 d6 2.d4 f5, an early pawn strike at e4. White can take with exf5 and develop with Nf3, Nc3 and Bd3, and Black's kingside is left loose.
- Moves
- 1.e4 d6 2.d4 f5
- ECO
- A82
- Engine
- +1.16 · a clear edge for White (Stockfish 17.1, depth 20)
- Played
- 569 games in our lichess sample
- White scores
- 54.7%
Key ideas for both sides
White
- Take with 3.exf5 and meet ...Bxf5 with Nf3, Nc3 and Bd3 to trade off Black's active bishop.
- Use the weak e6 square and the open e-file once Black's bishop is gone.
- 3.Nc3 is also good, adding a piece to the fight for e4 and f5 before taking.
- Castle short and attack along the e-file and the light squares around Black's king.
Black
- Recapture with ...Bxf5 and develop quickly with ...Nf6 and ...e6 behind it.
- Trade light-squared bishops with ...Bxd3 to ease the pressure on the kingside.
- Castle quickly, since the king's pawn cover is weak after the early ...f5.
- Accept that White is better and aim for a solid setup rather than tactics.
Plans and pawn structure
This is a dubious line for Black. After 3.exf5 Bxf5, White plays Nf3, Nc3 and Bd3 and trades the light-squared bishops, leaving Black with weak light squares and a loose king. White plans short castling and pressure on the e-file and e6. Black should develop with ...Nf6 and ...e6, castle, and hope to stabilize, but White's space and better structure give a clear edge.
What the engine plays from here
Stockfish 17.1 at depth 20 rates the position +1.16: a clear edge for White. Its three top choices for White:
- +1.16 3.exf5 Bxf5 4.Nf3 Nf6 5.Nc3 e6
- +1.11 3.Nc3 Nf6 4.exf5 Bxf5 5.Nf3 e6
- +0.82 3.Nd2 Nf6 4.Bd3 g6 5.c3 Nc6
Pawns, from White's side.
How it scores on lichess
569 rated lichess games reached this position; White scored 54.7%.
Light: White wins. Grey: draws. Dark: Black wins. About the sample.
How to play against it
As White, take with 3.exf5 and develop fast with Nf3, Nc3 and Bd3. Trade the light-squared bishops and aim at e6 and the e-file. Do not rush an attack before castling; Black's weak light squares and e6 pawn do not disappear.
Questions
What are the moves of the Rat Defense: Balogh Defense?
The Rat Defense: Balogh Defense starts 1.e4 d6 2.d4 f5. Its ECO code is A82.
Is the Rat Defense: Balogh Defense good for Black?
Stockfish 17.1 rates the position +1.16 at depth 20, which is a clear edge for White. In 569 lichess games from our sample, White scored 54.7%. A dubious line for Black that only works as a surprise, and White does well with simple development and Bd3.
What is the main idea of the Rat Defense: Balogh Defense?
Black hits e4 with ...f5 early. White takes with exf5 and develops quickly, trading light-squared bishops and using the weakened light squares around Black's king.
What should White play next?
The engine's first choice is exf5, with Nc3 and Nd2 close behind. 3.exf5 takes the pawn and forces Black to spend time recapturing with the bishop.
Related lines
Updated October 2026. Sources and method.