About this opening
Marienbad System is an opening in the Encyclopedia of Chess Openings,
classified under code A47. ECO group A (A00–A99)
covers flank and irregular openings, including the English, Bird, Réti and Dutch defences. This particular variation is reached
after 8 half-moves from the
starting position, with the move sequence 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5.
The opening sequence in prose form: 1.d4 Nf6, 2.Nf3 b6, 3.g3 Bb7, 4.Bg2 c5. From this position exactly one named continuation is recorded in the encyclopaedia.
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. The list of recorded continuations sits directly below the board. 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 A47 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.