[ECO code C01]
Exchange Variation
White develops his Queen's Knight to QB3(c3) behind his QBP, challenging Black's QP again. Tends to continue 5..B-K2 [or ..B-QKt5], 6.Kt-B3 with equality.
White Black 1. P-K4 P-K3 2. P-Q4 P-Q4 3. PxP PxP 4. P-QB4 Kt-KB3 5. Kt-QB3
Example ends: Undo or Jump or Clear