About this opening
Alekhine Defense: Modern Variation, Keres Variation is an opening in the Encyclopedia of Chess Openings,
classified under code B04. 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 13 half-moves from the
starting position, with the move sequence 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. Bc4 Nb6 6. Bb3 Bg7 7. a4.
It belongs to the Alekhine Defense family.
Within that family this is a level-2 branch (the Modern Variation → Keres Variation line). The immediate parent line is Alekhine Defense: Modern Variation, transitioned via 7.a4.
The opening sequence in prose form: 1.e4 Nf6, 2.e5 Nd5, 3.d4 d6, 4.Nf3 g6, 5.Bc4 Nb6, 6.Bb3 Bg7. 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 B04 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.