A91 is the opening Dutch Defense: Classical Variation of the volume A · Flank openings: 8 half-moves to the position in the diagram, 2 variations in the ECO table.
What the games say
355 games in the collections, from 1851 to 2021. Mean rating of the games with ratings: 2407.
White wins 41 %, draws 34 %, Black wins 25 %
Most games: Williams, Simon Kim (11), Guimard, Carlos Enrique (8), Botvinnik, Mikhail (7), Karpov, Anatoly (6), Naumkin, Igor (6)
All 2 variations
- Dutch Defense: Classical Variation 1.d4 f5 2.c4 ♘f6 3.g3 e6 4.♗g2 ♗e7
- Dutch Defense: Classical Variation, Blackburne Attack 1.d4 f5 2.c4 ♘f6 3.g3 e6 4.♗g2 ♗e7 5.♘h3