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Semi-Slav Defence
The Semi-Slav Defence begins after the moves 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6. It is one of Black's most challenging answers to 1. d4, and is a favourite of players who want real fighting chances with Black from a solid base.
- For black
- Solid
- Sharp
Written by:
The Essentials
- Early moves:
- 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6
- Colour:
- Played by Black
- Style:
- Solid and sharp
- Difficulty to learn:
- Moderate to high
- Named after:
- A blend of two defences: the Slav's ...c6 and the Queen's Gambit Declined's ...e6.
- Trivia:
- Garry Kasparov wins the first game of his 2003 match against the computer Deep Junior with the Shabalov-Shirov Gambit.
- Variations:
- Meran Variation. Botvinnik Variation. Moscow Variation. Anti-Moscow Gambit. Stoltz Variation.
- Good for:
- BlitzRapidClassical
Best suited for rating
1400-2800
Why play the Semi-Slav Defence?
Few defences ask as much of a 1. d4 player as the Semi-Slav.
After 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6, the pawns on c6, d5 and e6 form a triangle that holds the centre firmly. Black can also take on c4 and follow up with ...b5.
White cannot play for a win without allowing counterplay. The main lines are dynamic, and Black often has room to play for more than a draw.
White picks the battlefield. 5. Bg5 leads to sharp play in the Botvinnik Variation and the Anti-Moscow Gambit, while 5. e3 heads for the Meran Variation or, after 6. Qc2, the Stoltz Variation.
The bishop on c8 is the Semi-Slav's sore spot. The e6-pawn shuts it in, and Black must spend time freeing it with ...b5 and ...Bb7 or a timely ...c5.
The sharpest lines also demand homework. Black often grabs the c4-pawn and pushes the kingside pawns to keep it, so one forgotten move can expose the king.
In return, Black gets a defence that grows with the player and teaches the classic breaks ...c5 and ...e5.
Try the Semi-Slav Defence yourself!
Why the Semi-Slav Defence is good with the:
Choice of weapons - White can head for sharp gambit play with 5. Bg5 or for a calmer positional game with 5. e3.
Broad centre - When Black takes on c4, White often answers with e4 and builds a pawn centre on d4 and e4.
Pawn for pressure - In the sharpest lines White gives up the c4-pawn for fast development and lasting activity.
Suited for - Well-prepared players who like to choose between a sharp gambit and slow pressure.
Why the Semi-Slav Defence is good with the white pieces
Choice of weapons - White can head for sharp gambit play with 5. Bg5 or for a calmer positional game with 5. e3.
Broad centre - When Black takes on c4, White often answers with e4 and builds a pawn centre on d4 and e4.
Pawn for pressure - In the sharpest lines White gives up the c4-pawn for fast development and lasting activity.
Suited for - Well-prepared players who like to choose between a sharp gambit and slow pressure.
Why the Semi-Slav Defence is good with the black pieces
Firm centre - The pawns on c6, d5 and e6 guard d5 so well that White has few targets in the centre.
Queenside space - After ...dxc4, the ...b5 advance gains space with tempo and prepares ...Bb7 and ...c5.
Fighting chances - White can only press for an advantage by allowing counterplay, so Black rarely has to settle for a dull defence.
Suited for - Ambitious, well-read players who want a solid base but welcome a tactical fight.
Strategy
The pawn breaks that decide the Semi-Slav.
White's pawn breaks
White prepares e4, sometimes with f3, and can push on to e5, while a4 strikes at the b5-pawn.
Black's pawn breaks
Black takes on c4, gains space with ...b5 and frees the position with ...c5.
Key squares
Both sides fight over e4 and e5, the c4 and c5 squares, the centre squares d4 and d5, and b5 and f6.
Freeing the bishop
Black prepares ...c5 with ...a6 and must time it precisely: too early or too late, and the position quickly collapses.
Traps and tactics
Two Botvinnik traps every Semi-Slav player should know, one for each side.
Themes
The tempo grab
Taking on c4 starts Black's counterplay rather than giving up the centre, and it works best when White must spend a second bishop move to recapture.
The e4 lever
If White gets e4 in with good support, the centre opens on his terms. If the push is held back, Black can complete development in peace.
The ...c5 break
If Black breaks with ...c5 at the right moment, the b7-bishop comes alive. If the timing is off, Black's position quickly falls apart.
Kings under fire
In the sharpest lines Black often trades king safety for quick counterplay, so a single inaccurate move by either side can decide the game.
History
The history of the Semi-Slav Defence, from its origins to modern play.
1924
Meran magic
Akiba Rubinstein beats Ernst Grünfeld with ...dxc4 and ...b5 at Meran, Grünfeld repeats the idea to beat Rudolf Spielmann, and the system takes the town's name.
1941-1945
On the air
Klaus Junge plays 5. Bg5 dxc4 in 1941, but the line takes Mikhail Botvinnik's name after he wins with it, including against Arnold Denker in the USSR versus USA radio match.
1992
Pawn storm
Alexei Shirov pushes g4 against the Stoltz Variation in Reykjavik, and the Shabalov-Shirov Gambit spreads among top players within the year.
2008
Title weapon
Viswanathan Anand beats Vladimir Kramnik twice with the Meran, and the two wins carry him towards victory in their world championship match.
2020s
Built to last
Among masters the Semi-Slav pulls far ahead of the Slav's ...dxc4 as Black's usual reply, and engines rate it as sound.
Model Games
Three games from Kasparov, Topalov and Anand.
FAQ
The Semi-Slav Defence begins after the moves 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6. Black supports d5 with both the c-pawn and the e-pawn, building a firm centre that can turn sharp once Black takes on c4.
Not really as a first opening. The pawn structure is easy to understand, but the main lines call for a lot of theory, and the bishop on c8 needs careful handling. It suits players who already know the basic Queen's Gambit structures.
Yes. Engines rate it as sound, and it has appeared in world championship matches from 1935 to 2013. The price is homework, since the sharpest lines punish a single forgotten move.
Black keeps a firm centre with pawns on c6, d5 and e6. Then Black waits for the right moment to take on c4, expand with ...b5 and free the position with ...c5 or ...e5. White's main lever is the e4 break.
It begins with 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5. Black takes on c4 once White's bishop has moved, gains time with ...b5 and prepares ...Bb7 and ...c5. It is named after the town of Meran in northern Italy, where it was played in 1924.
It begins with 5. Bg5 dxc4 6. e4 b5. Black holds the extra c4-pawn while White pushes e5 and gives up material for active play, so both sides need to know their theory.
Both begin with 1. d4 d5 2. c4 c6 and support d5 with the c-pawn. In the Slav, Black often takes on c4 and develops the light-squared bishop before ...e6. In the Semi-Slav, Black plays ...e6 first and keeps the pawn on d5, with the bishop behind the pawns.
There is no single best line. 5. Bg5 suits players who want a sharp fight in the Botvinnik and the Anti-Moscow Gambit, while 5. e3 leads to the Meran or, with 6. Qc2, the Stoltz Variation. White can also go for the Exchange Slav, which many Semi-Slav players avoid by starting with ...Nf6 and ...e6 before ...c6.
Akiba Rubinstein, Alexander Alekhine, Mikhail Botvinnik, Arthur Bisguier, Alexei Dreev, Alexei Shirov, Vladimir Kramnik, Veselin Topalov and Viswanathan Anand have all used it.
Choose the Slav if you want the light-squared bishop active from the start and accept giving up some of the centre for it. Choose the Semi-Slav if you want to keep the pawn on d5 and free the bishop later with ...b5 and ...c5.