[ECO code C19]
Advance Var. - The Positional Variation
White develops his King's Knight to KB3(f3) doubling the support for his centre pawns. W-Alt.
White Black White Black 1. P-K4 P-K3 6. PxB Kt-K2 2. P-Q4 P-Q4 7. Kt-B3 3. Kt-QB3 B-Kt 4. P-K5 P-QB4 5. P-QR3 BxKt ch
Example ends: Undo or Jump or Clear