Chess Openings Lab
a8b7c6d5e4f3g2h1

King's Knight Opening: Normal Variation

The Normal Variation of the King's Knight Opening is 1.e4 e5 2.Nf3 Nc6, the most common way to defend e5. White now picks a system with the third move, Bb5, Bc4 or d4, while Black aims for quick development and a share of the center.

Moves
1.e4 e5 2.Nf3 Nc6
ECO
C44
Engine
+0.25 · level (Stockfish 17.1, depth 20)
Played
9,768 games in our lichess sample
White scores
47.6%

Key ideas for both sides

White

  • 3.Bb5 starts the Ruy Lopez, putting pressure on the c6 knight, the only defender of e5.
  • 3.Bc4 leads to the Italian Game, aiming at f7 and preparing c3 and d4 later.
  • 3.d4 is the Scotch, opening the center at once; after the trade on d4 White gets free piece play.
  • Quieter tries like Nc3, c3 and Be2 keep options open but give Black fewer problems.

Black

  • Against Bb5, the engine line with ...Nf6 and ...Nxe4 (Berlin style) leads to a solid position.
  • Against Bc4, develop with ...Nf6 or ...Bc5 and keep an eye on f7 until you castle.
  • Against d4, take on d4 and develop with ...Nf6, ready for the trade on c6 and the e5 push.
  • Do not try cheap traps too early; sound development scores well here.

Plans and pawn structure

This position is a fork in the road. In the Ruy Lopez Black has to defend e5 for a long time, in the Italian the fight centers on d4 and f7, and in the Scotch the center opens and piece activity matters most. Black's universal plan is ...Nf6, a bishop to c5, e7 or b4, and short castling. Several named traps pass through here, including the Blackburne Shilling Gambit, the Fishing Pole Trap, Noah's Ark Trap and the Tarrasch Trap, so both sides must calculate.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.25: level. Its three top choices for White:

  1. +0.25 3.Bb5 Nf6 4.O-O Nxe4 5.Re1 Nd6
  2. +0.11 3.Bc4 Nf6 4.d3 Bc5 5.Nc3 h6
  3. +0.10 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6 bxc6

Pawns, from White's side.

How it scores on lichess

9,768 rated lichess games reached this position; White scored 47.6%.

under 120047.5%
1200–159947.4%
1600–199947.7%
2000 and up52.3%

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

Traps and pitfalls

Blackburne Shilling Gambit trap (Black sets it)

Black leaves e5 hanging with 3...Nd4 and answers 4.Nxe5 with 4...Qg5, attacking the knight and g2. If White grabs f7 with 5.Nxf7, the queen wins the h1 rook and the game ends with a smothered knight mate on f3.

a8b7c6d5e4f3g2h1

The Blackburne Shilling Gambit trap explained

Fishing Pole Trap (Black sets it)

Black leaves a knight on g4 as bait with 5...h5. If White takes it with 6.hxg4, the h-file opens and the black queen and pawn crash through to the white king.

a8b7c6d5e4f3g2h1

The Fishing Pole Trap explained

Where it goes next

How to play against it

As White, pick one main system and learn its key ideas instead of jumping between move three options. As Black, know one answer for each of Bb5, Bc4 and d4. Avoid moving the e5 pawn's defenders without reason, and watch for Bxf7 or Nxe5 shots before castling.

Questions

What are the moves of the King's Knight Opening: Normal Variation?

The King's Knight Opening: Normal Variation starts 1.e4 e5 2.Nf3 Nc6. Its ECO code is C44.

Is the King's Knight Opening: Normal Variation good for Black?

Stockfish 17.1 rates the position +0.25 at depth 20, which is level. In 9,768 lichess games from our sample, White scored 47.6%. The classical start that every open-game player must know, demanding a ready answer to each of White's main third moves.

What is the main idea of the King's Knight Opening: Normal Variation?

Black defends e5 with the knight and keeps a flexible, sound position. White chooses the character of the game on move three: Ruy Lopez play against e5, Italian development or Scotch-style open center.

What should White play next?

The engine's first choice is Bb5, with Bc4 and d4 close behind. 3.Bb5 pressures the knight that guards e5, the start of the Ruy Lopez.

Updated October 2026. Sources and method.