Sicilian: main lines, pawn structures and statistical results

I indicate PSCC, number of master games (K=1000), statistical evaluations and the sharpness in some peculiar cases.

2 plies

• 2Ec 1. e4 c5 Sicilian, 395K+, sev=+0.19

3 plies, 10K+ games

• 2Ec 1. e4 c5 2. Nf3 Open Sicilian, 318K+, sev=+0.24
• 2Ec 1. e4 c5 2. Nc3 Closed Scilian, 33K+, sev=+0.06
• 2Ec1C 1. e4 c5 2. c3 Alapin, 28K+, sev=+0.03

4 plies, 10K+ games

• 2Ec1d 1. e4 c5 2. Nf3 d6 Modern Sicilian, 129K+, sev=+0.21
• 2Ec 1. e4 c5 2. Nf3 Nc6 Old Sicilian, 89K+, sev=+0.31
• 2Ec1e 1. e4 c5 2. Nf3 e6 Sicilian: French, 85K+, sev=+0.19
• 2Ec 1. e4 c5 2. Nc3 Nc6 Closed: Traditional, 20K+, sev=+0.05
• 2Ec1C 1. e4 c5 2. c3 Nf6 Alapin: Main I, 11K+, sev=+0.00

5 plies, 10K+ games

• 2DEc1d 1. e4 c5 2. Nf3 d6 3. d4 Modern Sicilian: Main, 102K+, sev=+0.23, sh1=1.05 W-edged
  
• 2DEc1e 1. e4 c5 2. Nf3 e6 3. d4 Sicilian: French: Main, 62K+, sev=+0.21
• 2DEc 1. e4 c5 2. Nf3 Nc6 3. d4 Old Sicilian: Main, 56K+, sev=+0.24
• 2Ec 1. e4 c5 2. Nf3 Nc6 3. Bb5 Rossolimo, 20K+, sev=+0.53, sh1=1.02 W-edged
  
• 2Ec1d 1. e4 c5 2. Nf3 d6 3. Bb5+ Moscow, 15K+, sev=+0.03
• 3E2c1C 1. e4 c5 2. c3 Nf6 3. e5 Alapin: Advance, 10K+, sev=+0.01

(to be continued)

There are no abnormal statistical results so far.

Have you ever came across,   1.e4 c5, 2.Nf3 black moves  and white moves 3.Bd3

Not in my personal games but there are few dozens of master games in the local database. I see that ChessOK database gives the evaluation +0.00 to it both in Old and Modern Sicilian. More generally, moves Bd3 and Bd6 in openings blocking pawns, look awkward but they have quite decent engine evaluations. I played several times Bd6 (while blocking the pawn on d7) as black in King's Pawn games with mixed results.

Isnt that a system invented by an american player? I forgot his name, but I have played it, not horribly bad, not extremely good, the idea is to hide the bishop ruy lopez style with c3-Bc2-d4. 

Googled it and it is called Kopec system, AHA!

You are very correct Bronstein, this move is for white's game more so, and it give lots of flexiblity for the white bishop once on c2 and the cp is on c3

I've added 5-ply openings. So far, statistically, Rossolimo attack is the best for white.

I indicated 2 W-edged openings at 5-plies: Modern Sicilian: Main Line and Rossolimo Attack.

Thanks, Bernard! It happens deeper in Sicilian since Najdorf starts at 10 plies. Polugaevsky variation is double-edged. At how many plies have U evaluated the main line ?