ecocodes
Volume B · Semi-open games‹ B23B25 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

B24 Sicilian Defense: Closed, Fianchetto Variation

B24 holds four named lines, all under the name Sicilian Defense. It leaves B23 (Sicilian Defense: Closed, Traditional) with 3.g3. None of its four lines contains a capture. That final move, by the g-pawn, covers f4 and h4 and opens a line for the bishop on f1.

Score sheet
#WhiteBlack
1e4c5
2Nc3Nc6
3g3

Lines filed under B24

All four share their first five plies, the whole reference line.

NameAfter the shared startPlies
Sicilian Defense: Closed, Fianchetto Variation(the shared start itself)5
Sicilian Defense: Closed3...g66
Sicilian Defense: Closed3...g6 4.Bg2 Bg78
Sicilian Defense: Closed, Smyslov Variation3...g6 4.Bg2 Bg7 5.d3 e6 6.Be3 Nd4 7.Nce213

Sicilian Defense: Closed

  1. 3...g6 The g-pawn advances to g6, covering f5 and h5, opening a line for the bishop on f8.

Sicilian Defense: Closed

  1. 3...g6 The g-pawn advances to g6, covering f5 and h5, opening a line for the bishop on f8.
  2. 4.Bg2 The bishop leaves f1 for g2, guarding the rook on h1.
  3. 4...Bg7 The bishop leaves f8 for g7, guarding the rook on h8, attacking the knight on c3.

Sicilian Defense: Closed, Smyslov Variation

  1. 3...g6 The g-pawn advances to g6, covering f5 and h5, opening a line for the bishop on f8.
  2. 4.Bg2 The bishop leaves f1 for g2, guarding the rook on h1.
  3. 4...Bg7 The bishop leaves f8 for g7, guarding the rook on h8, attacking the knight on c3.
  4. 5.d3 The d-pawn advances to d3, covering c4 and e4, opening a line for the bishop on c1 and the queen on d1.
  5. 5...e6 The e-pawn advances to e6, covering d5 and f5, opening a line for the queen on d8.

The road to B24

  1. 1.e4 … 1...c5two earlier stops: B00, B20
  2. 2.Nc3B23 Closed
  3. 2...Nc6B23 Traditional
  4. 3.g3B24

The position after 3.g3

White has brought out the knight on c3; Black the knight on c6. Black is to move and has 26 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed11Moves spent on pawns21Pawns on d4, e4, d5, e510Squares attacked in the other half52not castlednot castled

Codes that branch off from B24

The reference lines of one other code leave B24 from the position after 4...Bg7, each with its own moves.

CodeMovesReference line
B255.d3 d6Sicilian Defense: Closed

Closest boards in other codes

CodeLineDiffers on
A36English Opening: Symmetrical Variation, Two Knights, Fianchetto Variationfour squares: c2, e2, c4, e4
A35English Opening: Symmetrical Variation, Two Knights Variationsix squares: c2, e2, g2, g3, c4, e4
B20Sicilian Defensesix squares: b1, g2, c3, g3, c6, b8
B30Sicilian Defense: Old Siciliansix squares: b1, g1, g2, c3, f3, g3
B10Caro-Kann Defenseseven squares: b1, g2, c3, g3, c5, c6, b8
B22Sicilian Defense: Alapin Variationseven squares: b1, c2, g2, c3, g3, c6, b8
A00Van Geet Openingeight squares: e2, g2, g3, e4, c5, c6, c7, b8

Where lines continue from here

Six named lines filed under other codes pass through the position after 3.g3. Besides the codes above, they belong to B26.

Volume B

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  100. 99

Open this line in the finderAll Sicilian Defense codes