The Kan Variation, Wing Attack, Spraggett Attack is a variation of the Sicilian Defense, catalogued as ECO B43. The line runs 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Nf3, reaching the position shown below after 13 half-moves.
White holds the centre with pawns on e4. White is ahead in development, with three minor pieces out to Black's zero. It is Black to move after seven moves.
On the Sicilian Defense generally: The most popular and aggressive response to 1.e4. Black fights for the center asymmetrically, leading to rich tactical play.
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The Kan Variation, Wing Attack, Spraggett Attack goes 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Nf3. It is a variation of the Sicilian Defense and is catalogued as ECO B43.
The Kan Variation, Wing Attack, Spraggett Attack is ECO B43. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Sicilian Defense.
Stockfish evaluates the position after 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Nf3 at +0.51 at depth 18, which is a slight pull for White, within normal opening margins. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
White holds the centre with pawns on e4. White is ahead in development, with three minor pieces out to Black's zero. It is Black to move.