About this opening
Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Modern Main Line is an opening in the Encyclopedia of Chess Openings,
classified under code A99. ECO group A (A00–A99)
covers flank and irregular openings, including the English, Bird, Réti and Dutch defences. This particular variation is reached
after 15 half-moves from the
starting position, with the move sequence 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. b3.
It belongs to the Dutch Defense family.
Within that family this is a level-3 branch (the Classical Variation → Ilyin-Zhenevsky Variation → Modern Main Line line). The immediate parent line is Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, transitioned via 8.b3.
The opening sequence in prose form: 1.d4 f5, 2.c4 Nf6, 3.g3 e6, 4.Bg2 Be7, 5.Nf3 O-O, 6.O-O d6. From this position the encyclopaedia records no further canonical continuations — practical play branches into unnamed transpositions or returns to the parent line for alternative ideas.
Use the interactive board above to walk through the moves position-by-position. Click any move in the navigation to step backwards, or use the keyboard arrow keys. For statistical data — how often master-level players have reached this position, White's win-rate, draw frequency, Black's score — see the panel in the right column.
Caissly's coverage of A99 extends through every named sub-variation in this line and across all four locales (English, Spanish, Portuguese, Russian). Where editorial commentary exists for a specific variation it appears as the page body; otherwise the page presents the structural data, board, and statistics as shown here.