E23 is the opening Nimzo-Indian Defense: Spielmann Variation, Carlsbad Variation of the volume E · Indian defences: 14 half-moves to the position in the diagram, 4 variations in the ECO table.
What the games say
162 games in the collections, from 1922 to 2022. Mean rating of the games with ratings: 2458.
White wins 35 %, draws 42 %, Black wins 23 %
Most games: Soppe, Guillermo (8), Stahlberg, Gideon (8), Euwe, Max (7), Spielmann, Rudolf (6), Akopian, Vladimir (5)
All 4 variations
- Nimzo-Indian Defense: Spielmann Variation, Carlsbad Variation 1.d4 ♘f6 2.c4 e6 3.♘c3 ♗b4 4.♕b3 c5 5.dxc5 ♘c6 6.♘f3 ♘e4 7.♗d2 ♘xd2
- Nimzo-Indian Defense: Spielmann Variation, Romanovsky Gambit 1.d4 ♘f6 2.c4 e6 3.♘c3 ♗b4 4.♕b3 c5 5.dxc5 ♘c6
- Nimzo-Indian Defense: Spielmann Variation, Stahlberg Variation 1.d4 ♘f6 2.c4 e6 3.♘c3 ♗b4 4.♕b3 c5 5.dxc5 ♘c6 6.♘f3 ♘e4 7.♗d2 ♘xc5
- Nimzo-Indian Defense: Spielmann Variation, Stahlberg Variation 1.d4 ♘f6 2.c4 e6 3.♘c3 ♗b4 4.♕b3 c5 5.dxc5 ♘c6 6.♘f3 ♘e4 7.♗d2 ♘xc5 8.♕c2 f5 9.g3