Chessy
Sicilian Defense: O'Kelly Variation, Venice System, Steiner Line
After 1.e4 c5 2.Nf3 a6 3.c3 d6, White has already committed to a structure that asks a direct question. Your job as Black is not to chase every pawn, but to meet the centre challenge cleanly and know which reply matters most. The drill below puts you in the exact position where the opening starts to turn concrete. Learn the main idea, spot the common inaccuracies, and practise the best answer until it feels natural.
Play the Sicilian Defense: O'Kelly Variation, Venice System, Steiner Line against the engine
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Create a free account →What this line is asking you to solve
This position is simple in shape but serious in content. White to move has a broad central choice, and Black must be ready to answer that central break without drifting. The move ...d6 supports your queenside setup, but it also means the centre can open quickly if you are careless. In practical terms, you should be thinking about central tension, piece development, and not allowing White to get a free hand in the middle of the board.
The engine’s main answer
The engine’s best move here is d4, and the continuation given is d4 Nf6 dxc5 Nc6. That tells you exactly where the opening’s fight is heading: White wants to claim space and open lines, while you need to react with accurate development and piece activity. In this type of position, the main lesson is to answer the centre cleanly rather than waiting passively. If you know this pattern, you are already much closer to surviving the opening comfortably.
What the database says about the position
Across 220,574 games at this exact position, White wins 52.1%, draws 3.9%, and Black wins 44.0%. Stockfish rates this +0.70, a clear, lasting advantage for White. That means you are already slightly worse and need to play accurately. The position is playable, but it is not one where you can expect the engine to forgive slow or imprecise moves.
The replies you will see most often
The most-played continuation is d4 with 170,394 games, and White scores 52.5% there. Other common choices are Bc4 with 14,171 games and White scoring 50.0%, Be2 with 14,099 games and White scoring 54.4%, h3 with 4,474 games and White scoring 53.1%, d3 with 2,977 games and White scoring 48.8%, and a4 with 2,893 games and White scoring 49.6%. In other words, you should expect White to choose between a direct centre grab and quieter developing moves, so you need a response pattern you can trust.
The mistakes to punish
Three of the listed continuations are flagged as inaccuracies. Be2 is an inaccuracy and loses about 0.6 pawns; d3 is also an inaccuracy and loses about 0.6 pawns; a4 is an inaccuracy and loses about 0.8 pawns. In each case, the better move was d4. That is useful practical information: if White does not strike in the centre, they are already giving you a chance to take over the struggle for the middle of the board.
Results across 220,574 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| d4 | 170,394 | 52.5% |
| Bc4 | 14,171 | 50.0% |
| Be2 | 14,099 | 54.4% |
| h3 | 4,474 | 53.1% |
| d3 | 2,977 | 48.8% |
| a4 | 2,893 | 49.6% |
Frequently asked questions
What is the main move White should play here?
The engine’s best move is **d4**. In the main continuation given, the position continues **d4 Nf6 dxc5 Nc6**. If you know that central break is the critical one, you can focus your defence on the right battle.
Is this a good opening line for Black?
The results here are not in Black’s favour. Stockfish gives **+0.70**, a clear, lasting advantage for White, and the database also shows White scoring better overall than Black. You should treat the line as playable, but demanding.
Which White moves are most common after 1.e4 c5 2.Nf3 a6 3.c3 d6?
The most-played move is **d4**, and the other common choices are **Bc4**, **Be2**, **h3**, **d3**, and **a4**. Several of these are quieter developing moves, but the central break is the main move you need to be ready for.
Which moves are considered mistakes in this position?
**Be2**, **d3**, and **a4** are all listed as inaccuracies. Each one is said to lose roughly half a pawn or more, and the better move in every case was **d4**. That means you should be alert for White to miss the strongest central challenge.
How many games feature the Sicilian Defense: O'Kelly Variation, Venice System, Steiner Line?
Over 220K Lichess games have reached the Sicilian Defense: O'Kelly Variation, Venice System, Steiner Line position. White wins 52.1%, Black wins 44.0%, with 3.9% draws — based on real rated games.