Chess Openings Lab
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Ruy Lopez: Exchange Variation, Keres Variation

The Keres Variation of the Exchange Ruy is 4...dxc6 5.Nc3, where White develops the queen's knight before castling. The knight now covers e4, so Nxe5 becomes a real threat, and Black must guard e5 while White prepares d4.

Moves
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.Nc3
ECO
C68
Engine
−0.09 · level (Stockfish 17.1, depth 20)
Played
571 games in our lichess sample
White scores
54.7%

Key ideas for both sides

White

  • Play d4 and trade queens after ...exd4, aiming for a favorable endgame as in the main engine line.
  • Keep the king flexible; Nc3 means the knight already protects e4 against queen raids.
  • Push h4 in the endgame to gain kingside space, as the top engine line shows.

Black

  • Guard e5 with ...f6, then meet d4 with ...exd4 and trade queens calmly.
  • ...Qd6 also covers e5 and keeps queens on to avoid a dry endgame.
  • Develop the knight to f6 or e7 and the bishop to d7 or e6.

Plans and pawn structure

This line often heads to an early queen trade after d4 and ...exd4. White wants the endgame with a healthy kingside majority and uses h4, Be3 and long-term pawn play. Black uses the bishop pair and ...Bd7, ...O-O-O to activate the king and rooks. If queens stay on with ...Qd6, Black aims for ...Ng4 and kingside play while White plays Be3 and Qd2.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position −0.09: level. Its three top choices for Black:

  1. −0.09 5...f6 6.d4 exd4 7.Qxd4 Qxd4 8.Nxd4
  2. −0.03 5...h6 6.a3 Qd6 7.d4 exd4 8.Qxd4
  3. +0.13 5...Qd6 6.d4 exd4 7.Nxd4 Nf6 8.Be3

Pawns, from White's side.

How it scores on lichess

571 rated lichess games reached this position; White scored 54.7%.

under 120048.0%
1200–159958.6%
1600–199951.3%
2000 and up57.8%

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

Where it goes next

  • Exchange Variation, Romanovsky Variation5...f6 · rare

How to play against it

As Black, cover e5 at once with ...f6 or ...Qd6. Do not develop casually, since Nxe5 wins a pawn now that the knight protects e4. As White, play d4 and welcome the queen trade, because the healthier kingside majority matters most once queens are gone.

Questions

What are the moves of the Ruy Lopez: Exchange Variation, Keres Variation?

The Ruy Lopez: Exchange Variation, Keres Variation starts 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.Nc3. Its ECO code is C68.

Is the Ruy Lopez: Exchange Variation, Keres Variation good for White?

Stockfish 17.1 rates the position −0.09 at depth 20, which is level. In 571 lichess games from our sample, White scored 54.7%. A practical choice for White players who like endgames; Black must guard e5 and keep the bishops active.

What is the main idea of the Ruy Lopez: Exchange Variation, Keres Variation?

White develops the knight to c3, defending e4 so Nxe5 becomes a real threat. Black guards e5 with ...f6 or ...Qd6 and heads for an equal endgame or middlegame.

What should Black play next?

The engine's first choice is f6, with h6 and Qd6 close behind. 5...f6 guards e5 and prepares a calm queen trade after d4.

Updated October 2026. Sources and method.