English Opening: King's English Variation, Four Knights Variation, Korchnoi Line
1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3
4… d5−0.14
The position is roughly equal. Stockfish 18, depth 18.
Analyze this positionIn the English Opening: King's English Variation, Four Knights Variation, Korchnoi Line (A28), reached after 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3, Stockfish 18 recommends 4… d5 for Black. The position is roughly equal (−0.14).
Top engine moves
- −0.144… d5 5. cxd5 Nxd5 6. e4 Nf4 7. d4 exd4 8. Bxf4 dxc3 9. bxc3
- +0.094… g6 5. d4 exd4 6. Nxd4 Bg7 7. Nxc6 dxc6 8. Qxd8+ Kxd8 9. e4
- +0.104… Be7 5. d4 exd4 6. Nxd4 O-O 7. e4 Nxd4 8. Qxd4 d6 9. Bd3
Frequently asked questions
What is the best move in the English Opening: King's English Variation, Four Knights Variation, Korchnoi Line?
After 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3, Stockfish 18 at depth 18 recommends 4… d5 for Black, continuing 5. cxd5 Nxd5 6. e4 Nf4 7. d4 exd4 8. Bxf4 dxc3 9. bxc3. The position is roughly equal (−0.14). The next best moves are 4… g6 (+0.09) and 4… Be7 (+0.10).
Is the English Opening: King's English Variation, Four Knights Variation, Korchnoi Line a good opening?
Stockfish rates the position at −0.14: the position is roughly equal. Evaluations this early in the game are small, so practical results depend far more on knowing the plans and typical structures than on the engine's number.
What is the ECO code of the English Opening: King's English Variation, Four Knights Variation, Korchnoi Line?
A28. ECO codes classify chess openings from A00 to E99; A is the volume for flank openings.
Opening names from the Lichess opening book (CC0). Pieces by Colin M.L. Burnett (GPLv2+).