Queen's Gambit Declined, Cambridge Springs Defense

The Cambridge Springs - variant is a variant of the opening rejected the Queen's Gambit chess game. In the ECO codes it is classified under the key D52.

It is caused by the sequence of moves

1 d2 -d4 d7 -d5 2 c2 - c4 e7 - e6 3 Nb1 - c3 Ng8 - f6 4 Lc1 - g5 Sb8 - d7 5 e2 -e3 c7 - c6 6 Sg1 -f3 Qd8 - a5

The opening was played in 1904 at an international chess tournament in the U.S. city of Cambridge Springs, Pennsylvania, multiple and thus known. However, Emanuel Lasker in 1892 had tried this opening. Later this variant have, for example, Efim Bogolyubov and Alexander Alekhine, especially in his race for the World Chess Championship 1927 against José Raúl Capablanca, applied.

The fact that black in the Orthodox defense has less space, eg for his lady, he is actively against here. With 6 or 5 c4xd5 c4xd5 White succeeds, the transition in the exchange variation. After 5 c4xd5 e6xd5 geriete White by 6 Sc3xd5? in an opening trap. After 6 ... 7 Sf6xd5 Lg5xd8 Black reserves by the intermediate chess 7 ... Bf8 - b4 at the end of the forced Dd1 8 -d2 Lb4xd2 9 Ke1xd2 Ke8xd8 a minor piece for a pawn.

The main variant applies 7 Nf3 -d2 - b4 Bf8 8 Dd1 -c2 0-0 9 Lf1 - e2. The obvious at first glance train 7 Lf1 -d3 involves an often overlooked case for white. If after 7 ... Nf6 -e4! Cover features such as 8 Dd1 -c2? , 8 Dd1 -b3? or 8 Ta1 -c1? follow, White loses a minor piece by 8 ... Se4xg5 because the Take Back 9 Sf3xg5 for 9 ... d5xc4 fails (double attack on the Ld3 and Sg5 ).