1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 - QGD setup. 6...Qa5 - Cambridge Springs! Black pins the knight and creates threats.
White's plans: Play Bd3, O-O, Qc2. Unpin carefully. Black's plans: Play ...Bb4, ...Ne4. Create tactical threats.
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