Annotated by dugthemug (1200): Although primarily used for shock value and as a waiting move (sometimes used by players who prefer to play as Black), 1.a3 has other uses; It prevents the Black bishop from coming to b4 (and also discourages it from coming to c5 as White can then hit it with pawn to b4), and the move also sets the foundations for space gaining moves on the queenside with b4 and c4. Therefore Whites next move,… |