with e3, Bb4+ Line

This line reaches a Queen's Indian setup by way of the Bogo-Indian check 3...Bb4+. After 4. Nbd2 the knight stands on d2 rather than c3. With 5. e3 White adopts the quiet scheme of the parent line, while Black's bishop on b7 eyes e4 and no pawn has gone to d5. The most frequent reply, 6. a3, questions the bishop on b4 at once. The alternatives 6. Be2 and 6. Bd3 simply continue development. The engine gives White a slight edge, and White scores well in practice.