Chess Board
[ECO code A40]
ENGLISH DEFENCE
Perrin Variation

Black's QKt5(b4) knight removed White's light bishop on Q6(d3) for the threat of 7..BxP.
White's Queen deployment completes the B-for-Kt exchange on Q3(d3). Tends to continue 7..N-K2, 8.Kt-B3..Kt-Kt3 or 7..P-Q3, 8.Kt-B3..B-K2. Equality.
    White  Black	White  Black
 1. P-Q4   P-K3	     5.	Kt-B3  Kt-Kt5
 2. P-QB4  P-QKt3    6.	0-0    KtxB
 3. P-K4   B-Kt2     7.	QxKt
 4. B-Q3   Kt-QB3

Example ends: Undo or Jump or Clear