Chess Board
[ECO code D45]
SEMI-SLAV DEFENCE
(The) Stonewall Variation
White develops his King's Bishop to Q3(d3) to attack Black's knight and enable an eventual P-K4.
Black's KBPawn advance to KB4(f5) doubles his knight's defence and completes a Stonewall system.
    White  Black	White  Black
 1. P-Q4   P-Q4	     6.	B-Q3   P-KB4
 2. P-QB4  P-K3
 3. Kt-QB3 Kt-KB3
 4. Kt-B3  P-B3
 5. P-K3   Kt-K5
Example ends: Undo or Jump or Clear