The Kan Variation, Polugaevsky Variation is a variation of the Sicilian Defense, catalogued as ECO B42. The line runs 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Bc5, reaching the position shown below after 10 half-moves.
White holds the centre with pawns on e4. Development is level at two minor pieces each. It is White to move after five 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, Polugaevsky Variation goes 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Bc5. It is a variation of the Sicilian Defense and is catalogued as ECO B42.
The Kan Variation, Polugaevsky Variation is ECO B42. 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. Bd3 Bc5 at +0.47 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. Development is level at two minor pieces each. It is White to move.