Chess Board
[ECO code D16]
SLAV DEFENCE - Alapin Var.
Steiner Variation
White's half-pinned K-side Knight move to K5(e5) forks Black's light bishop and doubled QBP.
Black's KKt5(g4) Bishop to KR4(h5) keeps the KP pin but loses tempo, with disavantage on 7.P-R3/B3.
    White  Black	White  Black
 1. P-Q4   P-Q4	     6.	Kt-K5  B-R4
 2. P-QB4  P-QB3
 3. Kt-KB3 Kt-B3
 4. Kt-B3  PxP
 5. P-QR4  B-Kt5
Example ends: Undo or Jump or Clear