White's Bishop on Q2(d2) moves to
KB4(f4) and adds to his control of K5(e5) but
loses the tempo gained earlier.
This position is more common in the Stonewall Var.
but in 9 moves (see to continue).
White Black White Black
1. P-Q4 P-KB4 6. Kt-QB3 P-Q4
2. P-QB4 P-K3 7. Kt-B3 P-B3
3. P-KKt3 Kt-KB3 8. Q-B2 0-0
4. B-Kt2 B-Kt5 ch 9. 0-0 Q-K1
5. B-Q2 B-K2 10. B-B4