ecocodes
Volume A · Flank openings‹ A17A19 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

A18 English Opening: Mikenas-Carls Variation

A18 holds three named lines, all under the name English Opening. It leaves A17 (English Opening: Anglo-Indian Defense, Hedgehog System) with 3.e4. That final move, by the e-pawn, covers d5 and f5 and opens a line for the queen on d1 and the bishop on f1. Of all other reference positions, the board of A19 (Mikenas-Carls, Sicilian) comes closest, two squares apart.

Score sheet
#WhiteBlack
1c4e6
2Nc3Nf6
3e4

Lines filed under A18

All three share their first five plies, the whole reference line and then split two ways at Black’s move 3.

NameAfter the shared startPlies
English Opening: Mikenas-Carls Variation(the shared start itself)5
English Opening: Mikenas-Carls Variation3...Nc66
English Opening: Mikenas-Carls Variation3...d5 4.e57

English Opening: Mikenas-Carls Variation

  1. 3...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8.

English Opening: Mikenas-Carls Variation

  1. 3...d5 The d-pawn advances two squares to d5, covering c4 and e4, opening a line for the bishop on c8 and the queen on d8.
  2. 4.e5 The e-pawn advances to e5, covering d6 and f6, attacking the knight on f6.

The road to A18

One of the three named positions on the way are reached by a move order other than their own.

  1. 1.c4one earlier stop: A10
  2. 1...e6A13 Agincourt Defense
  3. 2...Nf6A17 Hedgehog System by another order
  4. 3.e4A18

The position after 3.e4

White has brought out the knight on c3; Black the knight on f6. Black could capture with Nxe4. Black is to move and has 28 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed11Moves spent on pawns21Pawns on d4, e4, d5, e510Squares attacked in the other half44not castlednot castled

Codes that branch off from A18

The reference lines of one other code leave A18 from the position after 3.e4, each with its own moves.

CodeMovesReference line
A193...c5English Opening: Mikenas-Carls, Sicilian

Closest boards in other codes

CodeLineDiffers on
A16English Opening: Anglo-Indian Defense, Queen’s Knight Variationfour squares: e2, e4, e6, e7
A22English Opening: King’s English Variation, Two Knights Variationfour squares: e2, e4, e5, e6
C26Vienna Game: Falkbeer Variationfour squares: c2, c4, e5, e6
A13English Opening: Agincourt Defensesix squares: b1, e2, c3, e4, f6, g8
A15English Opening: Anglo-Indian Defensesix squares: b1, e2, c3, e4, e6, e7
A21English Opening: King’s English Variation, Reversed Siciliansix squares: e2, e4, e5, e6, f6, g8
B02Alekhine Defensesix squares: b1, c2, c3, c4, e6, e7

Where lines continue from here

Two named lines filed under other codes pass through the position after 3.e4. All of them belong to the codes listed above.

Volume A

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  100. 99

Open this line in the finderAll English Opening codes