Chess Board
[ECO code A00]
HEINRICHSEN OPENING
Exchange Variation
White's Knight on KB3(f3) removes Black's queen on Q4(d4), completing a fourth exchange.
Black pushes his Queen's Rook's Pawn out to QR3(a6) preventing 9.B-QKt5+ch, and ..P-QB4 will drive White's knight from the centre with equality.
    White  Black     5.	KtxKt ch QxKt
 1. Kt-QB3 P-Q4	     6.	P-Q4   PxP
 2. P-K4   PxP	     7.	QxP    QxQ
 3. KtxP   P-K4	     8.	KtxQ   P-QR3
 4. Kt-KB3 Kt-KB3
Example ends: Undo or Jump or Clear