Chess Openings Lab
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Philidor Defense: Lion Variation

The Lion Variation is 3.d4 Nf6 4.Nc3 Nbd7, where Black keeps the e5 pawn with a solid knight setup. White can attack with h3 and g4 or play classically with Bc4 and a4, while Black aims for ...Be7, ...c6 and ...O-O and a later break.

Moves
1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Nc3 Nbd7
ECO
C41
Engine
+0.60 · a slight edge for White (Stockfish 17.1, depth 20)
Played
1,589 games in our lichess sample
White scores
49.9%

Key ideas for both sides

White

  • Gain kingside space with 5.h3 and g4, as the engine prefers, and push the knight off f6.
  • Play a4 to stop ...b5, then Bc4 and O-O for a classical setup.
  • After ...exd4 and ...Ne5, move the bishop to a2 so it stays on the a2-g8 diagonal.
  • Use Be3 and Qd2 to prepare long castling when Black's king is short.

Black

  • Develop with ...Be7, ...O-O and ...c6, keeping e5 well protected.
  • Against g4, answer with ...h6 and ...Qc7, keeping the king in the center for a while.
  • Take on d4 and jump to e5 with the knight to hit the c4 bishop.
  • Prepare ...b5 or ...d5 to break when White's pieces commit.

Plans and pawn structure

The structure is central tension: d4 and e4 against d6 and e5. White can choose a slow plan with a4, Bc4, O-O and Re1, or attack with h3, g4 and Be3. Black keeps the center with ...Be7, ...c6, ...Qc7, and either castles short or delays. The key breaks are ...exd4 with ...Ne5, or ...b5 in the slower lines.

Where the engine's main line heads: Central tension: d4 and e4 against e5. Central tension: d4 and e4 against e5. One capture changes the character of the game.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.60: a slight edge for White. Its three top choices for White:

  1. +0.60 5.h3 Be7 6.g4 h6 7.Be3 c6
  2. +0.53 5.a4 Be7 6.Bc4 exd4 7.Nxd4 Ne5
  3. +0.49 5.Bc4 Be7 6.O-O O-O 7.a4 exd4

Pawns, from White's side.

How it scores on lichess

1,589 rated lichess games reached this position; White scored 49.9%.

under 120070.8%
1200–159947.2%
1600–199948.9%
2000 and up49.9%

Light: White wins. Grey: draws. Dark: Black wins. About the sample.

Where it goes next

  • Lion Variation, Forcing Line5.Bc4 · rare
  • Lion Variation, Lion's Claw, with Be2 and c65.Be2 · rare

How to play against it

As White, try 5.h3 and g4 for a direct kingside attack, or play a4 and Bc4 for a calmer edge. Avoid early trades on e5 that free Black's game. Keep Black's knights out of e5 and c5.

Questions

What are the moves of the Philidor Defense: Lion Variation?

The Philidor Defense: Lion Variation starts 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Nc3 Nbd7. Its ECO code is C41.

Is the Philidor Defense: Lion Variation good for Black?

Stockfish 17.1 rates the position +0.60 at depth 20, which is a slight edge for White. In 1,589 lichess games from our sample, White scored 49.9%. A sturdy choice for Black players who like solid, slow positions, but it demands patience under White's space edge.

What is the main idea of the Philidor Defense: Lion Variation?

Black keeps a compact center with ...Nf6, ...Nbd7, ...Be7 and ...c6. White can attack with h3 and g4 or play classically with a4 and Bc4, while Black waits for the right break.

What should White play next?

The engine's first choice is h3, with a4 and Bc4 close behind. 5.h3 prepares g4 to gain space and drive the f6 knight away from e4 and d5.

Updated October 2026. Sources and method.