GM Ivan Cheparinov has released another state-of-the-art opening repertoire: Queen’s Gambit Declined – Part 1, which delves into Black’s most dependable defense against 1.d4. The QGD remains immensely popular across all levels of chess. Its basic plans are straightforward and easy to understand: develop the kingside with ...Nf6, ...Be7, and ...0-0, followed by active play often based on the move ...c5.