About this opening
Dutch Defense: Hort-Antoshin System is an opening in the Encyclopedia of Chess Openings,
classified under code A86. ECO group A (A00–A99)
covers flank and irregular openings, including the English, Bird, Réti and Dutch defences. This particular variation is reached
after 10 half-moves from the
starting position, with the move sequence 1. d4 f5 2. c4 Nf6 3. g3 d6 4. Bg2 c6 5. Nc3 Qc7.
It belongs to the Dutch Defense family. Within that family this is a sub-variation (the Hort-Antoshin System line).
The opening sequence in prose form: 1.d4 f5, 2.c4 Nf6, 3.g3 d6, 4.Bg2 c6, 5.Nc3 Qc7. 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 A86 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.