Four Knights Game
Learn the Four Knights after 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6: why it looks drawish, the 4.Bb5 Symmetrical line and the Metger break, Black's 4...Nd4 Rubinstein, the 4.d4 Scotch Four Knights, and where to practice.
Opening Moves
1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6
See past the Four Knights' drawish reputation - the game is about who breaks the symmetry first, with White's Bb5 pin and Nd5 or Black's ...Nd4 counter-jump.
Ask a new 1.e4 e5 player for the most natural opening moves they can think of, and they will often reinvent the Four Knights by accident: knight to f3, knight to c6, knight to c3, knight to f6. Both sides develop both knights before a single bishop moves. It is sound, it is easy to play, and it has a reputation for ending in a handshake.
That reputation is the interesting part. The position after four knight moves is almost a mirror, so neither side is handed an advantage. If you want to win, you have to make an imbalance yourself. This page is about the two tools for doing that: White's Bb5 pin, and Black's ...Nd4 jump.
Useful next actions:
Why It Looks Like A Draw
The Four Knights is 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6. Step through it and look at how little tension there is:
The Four Knights tabiya. Every knight is on its best square, the pawns face off on e4 and e5, and nothing is attacked. This is a safe starting point with no built-in edge for either colour. — r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq - 4 4
That is the whole deal the Four Knights offers. You get fast, harmonious development and almost nothing can go wrong in the first few moves, which is the same instinct behind getting your pieces to work as a team rather than grabbing space you cannot use. In exchange you get no free advantage. The pawns are symmetric, the pieces are symmetric, and the fight is about who breaks that symmetry first and on better terms.
Symmetric positions have a hidden rule worth remembering: the player to move is one tempo ahead, so pure copying eventually costs the copier. Whoever refuses to create an imbalance is usually the one who drifts into trouble, not into a safe draw. That is why the Four Knights rewards a plan more than it rewards caution, and why thinking a move ahead about the opponent's idea matters even in a quiet-looking position.
White's Fourth Move Is A Fork In The Road
White chooses how to unbalance the game on move four. These are different games, not transpositions of one another, so read the choice before you reach for a plan. Click any line to replay it on the board.
| White's move 4 | Name | What White is doing |
|---|---|---|
| 4.Bb5 | Spanish Four Knights | Pin the c6 knight, Ruy-style, and aim for a later Nd5. |
| 4.d4 | Scotch Four Knights | Open the center at once and trade on c6. |
| 4.g3 | Glek | Fianchetto the bishop and sidestep the Bb5 theory. |
| 4.Bc4 | Italian Four Knights | Aim at f7 and usually steer into the Italian. |
The two replies worth knowing in depth are 4.Bb5 and the way Black answers it, because that is where the "boring draw" reputation is actually made and broken.
The Spanish Four Knights: 4.Bb5 And The Mirror
4.Bb5 borrows the main idea of the Ruy Lopez: pin the knight on c6 against nothing in particular yet, and keep the option of trading it or building pressure. Black's most natural answer is to copy the idea with 4...Bb4, pinning White's c3 knight in return. After both sides castle and play d3 and d6, White adds 7.Bg5 and Black is invited to mirror that too:
The mirror after 7.Bg5. White's bishop pins the f6 knight; Black's bishop pins the c3 knight. Everything matches - but it is Black to move, and copying White forever is not actually possible. — r1bq1rk1/ppp2ppp/2np1n2/1B2p1B1/1b2P3/2NP1N2/PPP2PPP/R2Q1RK1 b - - 1 7
Here is where the reputation for dull draws comes from, and also where it falls apart. Black cannot keep copying, because White is a move ahead in the mirror. If White uses the extra tempo for Nd5, Black cannot solve the position by copying the shape forever; Black has to meet the concrete threat. So the practical rule is that Black steps out of the mirror on purpose, and the classical way to do it is the Metger unpin:
7...Bxc3 hands White the bishop pair and doubles the c-pawns, but it also ends the copying and gives Black a concrete plan. The queen goes to e7 so the knight on c6 can reroute with ...Nd8-e6, hitting White's bishop on g5 and eyeing the d4 and f4 squares. White, for the pawns, gets the two bishops and a half-open b-file. The doubled c-pawns are a structural cost that the bishop pair is meant to offset, and the game becomes a normal fight over whether White's bishops or Black's better structure matters more. White's dream in these Spanish structures is the d5 outpost for a knight; Black's job is to deny it.
The Metger structure after 9.Re1 Nd8 10.d4 Ne6. White has the two bishops and doubled c-pawns; Black's knight has rerouted to e6, where it hits the bishop on g5 and watches d4 and f4. — r1b2rk1/ppp1qppp/3pnn2/1B2p1B1/3PP3/2P2N2/P1P2PPP/R2QR1K1 w - - 1 11
Black's Counterpunch: The Rubinstein 4...Nd4
If Black wants more than "step out of the mirror and equalize," the answer to 4.Bb5 is the Rubinstein, 4...Nd4. Black ignores the pin completely and jams a knight into the center:
The Rubinstein, 4...Nd4. The knight leaps in and attacks both the bishop on b5 and the knight on f3 at once. Black is inviting complications instead of copying, which is the whole point. — r1bqkb1r/pppp1ppp/5n2/1B2p3/3nP3/2N2N2/PPPP1PPP/R1BQK2R w KQkq - 6 5
The move looks like it drops a pawn, and the critical test is to take it. After 5.Nxe5, Black has the resource that makes the whole line work: 5...Qe7, defending nothing yet but attacking the knight on e5 and the pawn on e4 while renewing the threat to take on b5. The tidy way for White to stay out of trouble is to give the extra material back and trade down. Play through the Rubinstein simplification to see how the material comes back off:
Count what happened. White won a pawn on e5; Black won the bishop on b5; White won the knight back on b5; Black won the pawn back on e4, the queens came off, and ...Nd5 covered c7. The material is dead level, but the pieces are not the same: Black kept both bishops while White traded one off, so Black reaches the endgame with the bishop pair and no weaknesses. That is a fully healthy game for Black and a long way from a forced draw.
The sharper try is 6.f4, trying to keep the e5 pawn for a moment. Black can use the clean move order 6...Nxb5 7.Nxb5 d6, kicking the e5 knight only after removing the b5 bishop. Play through the 6.f4 try: after 8.Nf3 Qxe4+, White's uncastled king keeps the position sharp. That branch is genuinely messy and rewards preparation on both sides, so treat it as a real fight rather than a free point. The lesson underneath both branches is the same one behind every good capture: a trade is only worth making when it improves your position, and in the Rubinstein Black trades to reach a structure Black is happy with.
The Scotch Four Knights: 4.d4
Instead of pinning, White can open the center immediately with 4.d4. This is the Scotch Four Knights, a move-order cousin of the Scotch proper. Black is fine with accurate play: take on d4, pin the c3 knight, and use the central break ...d5. Play through the Scotch Four Knights line to see how that plan unfolds.
After 7...d5. Black's pawn hits e4 and opens lines for both bishops. The doubled c-pawns are the price for the half-open b-file and easy development, and the position is balanced. — r1bqk2r/p1p2ppp/2p2n2/3p4/1b2P3/2NB4/PPP2PPP/R1BQK2R w KQkq - 0 8
The ...d5 break is the point of the whole line. It challenges e4, opens the diagonal for the c8 bishop, and reaches a symmetrical-looking but comfortable middlegame. Black's doubled c-pawns after ...bxc6 are not weak here; they help control d5 and e4 and come with the half-open b-file. There is a gambit sideline, 5.Nd5 (the Belgrade Gambit), where White offers a pawn for activity instead of recapturing on d4. Play through the Belgrade Gambit start to see the pawn-offer moment, but the main road is the calm equalizer above.
The Glek: 4.g3
4.g3 is the modern way to duck the heavy 4.Bb5 theory. White plans Bg2, castles, and fights for the center with pieces rather than a pin.
Black has two reliable answers. The direct 4...d5 challenges the center at once and usually equalizes after 5.exd5 Nxd5; the calmer 4...Bc5 just develops and keeps the tension. Neither side is fighting for a big edge here, which is exactly why some players choose the Glek: a normal middlegame with the bishop on g2, decided by understanding rather than memory.
Plans For Both Sides
Read this as a position guide rather than a move order to memorize.
| Side | Plan | Works best when | Warning sign |
|---|---|---|---|
| White | Pin with Bb5, keep the tension, and reroute a knight toward d5 or f5. | Black copies passively in the Symmetrical line. | You mirror Black yourself and let the extra tempo evaporate. |
| White | Open the center with 4.d4 and finish developing. | You want a clear structure over a theory battle. | You expect an edge against accurate ...d5. |
| White | Against 4...Nd4, play 5.Nxe5 and be ready to give the e5 pawn back. | You are happy in a level, slightly simplified game. | You try to keep the pawn and fall behind in development. |
| Black | Break the mirror first with the Metger unpin ...Bxc3, ...Qe7, ...Nd8-e6. | White plays the Symmetrical line and waits. | You keep copying and walk into White's first-move initiative. |
| Black | Use the Rubinstein 4...Nd4 as a real winning try. | You know the ...Qe7 resource and want the bishop pair. | You play ...Nd4 hoping for a trick and forget 5.Nxe5 Qe7. |
| Black | Answer 4.d4 with ...exd4, ...Bb4, and the ...d5 break. | You want equality without memorizing sharp lines. | You delay ...d5 and let White's center settle. |
Common Mistakes
| Mistake | Why it happens | Better habit |
|---|---|---|
| Copying White move for move in the Symmetrical line. | The mirror feels safe. | Break it on your terms with the Metger unpin. |
| White mirrors Black instead of playing for Nd5 or Nf5. | Symmetry looks harmless. | Use the extra tempo; find the knight's best square first. |
| White tries to keep the pawn after 4...Nd4 5.Nxe5. | Being up a pawn looks like winning. | Return it with 6.Nf3 and reach a healthy level game. |
| Black plays ...Nd4 as a one-move trap. | The double attack looks decisive. | Know the 5.Nxe5 Qe7 follow-up before you jump in. |
| Treating the whole opening as an automatic draw. | The reputation says so. | Pick a symmetry-breaking plan; the balance rewards activity. |
Where The Four Knights Meets Its Neighbors
A few move-four choices lead somewhere with its own theory. 4.Bc4 aims the bishop at f7 and most often steers the game into Italian waters:
If you meet 4.Bc4, follow the ideas on the Italian Game page, since that is where the position usually ends up.
There is also a tempting sacrifice to know so you can meet it, not so you can trust it. 4.Nxe5 is the Halloween Gambit: White gives up a knight for a pawn and then chases Black's pieces around with the e- and d-pawns.
Handled calmly, Black keeps the material advantage and unwinds.
Two more boundaries are worth a sentence. If White plays 2.Nc3 before Nf3, the game can take on a Vienna character with different move-order tricks. And if Black answers 2.Nf3 with 2...Nf6 instead of 2...Nc6, there is no Four Knights at all: that is the Petrov Defense, a separate defense with its own rules of engagement.
Practice The Four Knights
Play it from both sides. As White, practice choosing your imbalance early and then following it, whether that is the Bb5 pin toward Nd5 or the open center after d4. As Black, practice refusing the free draw: break the mirror with the Metger unpin, or take the fight to White with the Rubinstein.
| Goal | Go here |
|---|---|
| Drill the tabiya | Practice the Four Knights |
| See what people actually play at move four | Explore after 3...Nf6 |
| Compare the sharper Bb5 and Bc4 tries | Ruy Lopez and Italian Game |
The Four Knights is a good choice when you want a sound game with no early disasters and are willing to earn your winning chances by creating an imbalance. It stops being a draw the moment one side remembers that in a symmetric position, the player with a plan is the one a tempo ahead.
Keep studying this opening
- Practice Four Knights Game: Train the position against realistic replies.
- Explore the Four Knights Game position: Review the move tree from the opening tabiya.