Closed, Traditional

The Traditional Variation of the Closed Sicilian arises after 1. e4 c5 2. Nc3 Nc6, and it is the reply Black chooses most often against 2. Nc3. The knight puts a second guard on d4, the square that White's closed setups concede, and it commits none of Black's pawns. Black can still pick a kingside fianchetto with ...g6, a ...e6 setup aiming for ...d5, or a ...d6 structure, and can wait to see White's plan before deciding. The cost is that an early knight on c6 rules out a Najdorf if White later opens the center, so Black needs an answer to open lines with the knight already committed.

White's third move largely determines the character of the game. 3. Nf3 is the most popular choice, played in about a third of games; it keeps 4. d4 in reserve, so play can still transpose into an Open Sicilian. The Grand Prix Attack, 3. f4, comes next and leads to a faster kingside build-up. 3. Bc4 places the bishop on the a2-g8 diagonal, eyeing f7, before White decides on the pawn structure.

The classical closed treatment is 3. g3, the Fianchetto Variation, usually continuing 3...g6 4. Bg2 Bg7 5. d3 d6, which gives the symmetrical, slow-maneuvering structure in which White prepares a kingside advance and Black a queenside expansion. Among the frequent third moves it produces the best results for White in the Lichess database. 3. Nge2, the Chameleon Variation, is far rarer but keeps both 4. g3 and 4. d4 open, and it is the engine's first preference. The Grob Attack, 3. g4, is an occasional surprise that grabs kingside space at once.

The engine judges the position roughly balanced, also listing 3. a4 among its top choices, a move that discourages Black's queenside expansion with ...b5. The position is one of the hundred or so most frequently reached named openings on Lichess. Results there are close to even, with White slightly ahead, and the draw rate is under 4 percent, reflecting the unbalanced, decisive games these lines tend to produce.