Zukertort Opening · A08

Reversed Grünfeld, after 4... e6, through 5. O-O

1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 e6 5. O-O

White's kingside bishop takes the long diagonal.

The first 4 moves, explained

• 1. Nf3 Develops the knight to f3, eyeing d4 and e5. Theory calls this the Zukertort Opening.
• 1... d5 Stakes a claim in the centre, controlling e4, and frees the bishop and queen.
• 2. g3 Prepares the fianchetto: the bishop will take the long diagonal via g2. Theory calls this the King's Indian Attack.
• 2... c5 Fights for d4 from the flank - contesting the centre without committing a centre pawn. Theory calls this the Sicilian Variation.

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