Polish Variation

The Polish Variation of the St. George Defense arises after 1. e4 a6 2. d4 b5 3. Nf3 Bb7 4. Bd3 e6. Instead of 4...Nf6, which hits e4 immediately and induces 5. Qe2, Black first plays ...e6, taking control of central squares such as d5 and freeing the dark-squared bishop. The pawn on e6 also prepares a later ...c5, Black's principal lever against the d4-e4 center, while the bishop on b7 keeps its diagonal trained on e4. Black's queenside expansion stays in place, so the game usually becomes a slower contest in which White tries to use the extra central space before Black's counterplay arrives.

White most often castles. The main line, 5. O-O, accounts for more than half of the games and is typically answered by 5...Nf6, with ...c5 kept in reserve. Less common choices are 5. c3, which reinforces d4, and 5. Be3, which develops while also supporting the center. The engine rates White's position as slightly better, but in online play Black's results are close to White's, and after 5. c3 Black actually scores better.