Chess Board
[ECO code D17]
OPEN SLAV DEFENCE - Krause Variation
White's QKtP2(b2) Pawn removes Black's bishop, relieves check and attacks Black's queen on Q4(d4).
Black's Queen removes the QBP with check, for a (best) perpetual 15.K-K2..Q-B2+ch, 16.K-K1..Q-B3+ch.
    White  Black	White  Black
 1. P-Q4   P-Q4	     8.	P-K4   BxP
 2. P-QB4  P-QB3     9.	PxB    KtxP
 3. Kt-KB3 Kt-B3    10.	Q-B3   QxP
 4. Kt-B3  PxP	    11.	QxP ch K-Q1 fcd
 5. P-QR4  B-B4	    12. B-Kt5 ch KtxB
 6. Kt-K5  P-K3	    13. QxKtP  BxKt ch
 7. P-B3   B-QKt5   14. PxB    QxP ch
Example ends: Undo or Jump or Clear