About this opening
Caro-Kann Defense: Breyer Variation, Stein Attack is an opening in the Encyclopedia of Chess Openings,
classified under code B10. ECO group B (B00–B99)
covers semi-open games (1.e4 with Black playing anything other than 1…e5), with the Sicilian, French, Caro-Kann and Pirc/Modern at its heart. This particular variation is reached
after 15 half-moves from the
starting position, with the move sequence 1. e4 c6 2. d3 d5 3. Nd2 g6 4. Ngf3 Bg7 5. g3 e5 6. Bg2 Ne7 7. O-O O-O 8. b4.
It belongs to the Caro-Kann Defense family.
Within that family this is a level-2 branch (the Breyer Variation → Stein Attack line). The immediate parent line is Caro-Kann Defense: Breyer Variation, transitioned via 8.b4.
The opening sequence in prose form: 1.e4 c6, 2.d3 d5, 3.Nd2 g6, 4.Ngf3 Bg7, 5.g3 e5, 6.Bg2 Ne7. 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 B10 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.