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Sicilian Defense: Moscow Variation, Sokolsky Variation: what should White play?
Best move
O-O+0.21
By playing O-O, you prioritize king safety and activate your h1 before the center opens up. This is a high-level prophylactic move that prepares for the upcoming struggle over the…
- Games played
- 19K
- To move
- White
- Evaluation
- +0.21
- Depth
- 18
Game counts: Lichess opening book. Move ranking and evaluation: Stockfish. How this page is built
Why O-O is the best move
O-O! — Excellent Choice!
✅ One of 3 top moves — you found a winning strategy!
Why this move is excellent:
By playing O-O, you prioritize king safety and activate your h1 before the center opens up. This is a high-level prophylactic move that prepares for the upcoming struggle over the d4 and d5 squares.
Multiple Valid Strategies
| Move | Eval | Style / Strategic Idea |
|---|---|---|
| O-O | +0.21 | Safety First: Secures the king and prepares for central expansion. |
| Nc3 | +0.20 | Development: Controls d5 and e4 immediately. |
| d3 | +0.19 | Solidification: Supports the e4 and opens the c1's diagonal. |
Different paths, same destination:
While most players (45%) instinctively choose the developing move Nc3, your choice of O-O shows great positional maturity. Whether you develop the knight first or tuck the king away, White maintains a slight edge by controlling the "Maroczy Bind" structure with pawns on c4 and e4.
Your Continuation
After O-O:
Nc6 Nc3 Be7 d3 f5
What Made This Move Good
You correctly saw: That the center is relatively closed, giving you the "tempo" to castle early. You recognized that the e1 was the only piece not yet ready for the middlegame, and you addressed it perfectly.
📚 Takeaway: In positions with multiple good moves, trust your style! You chose the most secure path, which is often the most resilient in long games.
What else gets played here
Move choices from 19K games in the opening book, with the engine's evaluation of each.
| Move | Evaluation | Played | Games | White score |
|---|---|---|---|---|
| Nc3 | +0.20 | 12K | 53% | |
| O-OEngine pick | +0.21 | 4.1K | 53% | |
| d3 | +0.19 | 2.0K | 52% | |
| b3 | +0.01 | 55 | 43% | |
| h3 | +0.05 | 16 | 75% |
More positions in the Sicilian Defense
- Best moveNf3Knight g1 → f3Sicilian Defense276M games
- Best moveBb5Bishop f1 → b5Sicilian Defense: Old Sicilian129M games
- Best moved4Pawn d2 → d4Sicilian Defense: Modern Variations109M games
- Best moveNxd4Knight f3 → d4Sicilian Defense: Open74M games
- Best moveNc3Knight b1 → c3Sicilian Defense: French Variation72M games
- Best movee6Pawn e7 → e6Sicilian Defense: Bowdler Attack68M games
Frequently asked questions
What is the best move for White in the Sicilian Defense: Moscow Variation, Sokolsky Variation?
O-O (+0.21). By playing O-O, you prioritize king safety and activate your h1 before the center opens up. This is a high-level prophylactic move that prepares for the upcoming struggle over the…
Why is O-O the best move here?
By playing O-O, you prioritize king safety and activate your h1 before the center opens up. This is a high-level prophylactic move that prepares for the upcoming struggle over the d4 and d5 squares.
How often does this position occur?
This position has been reached 19K times in the opening book.