Chess Board
[ECO code D44]
SEMI-SLAV DEFENCE
The Ekström Variation
Black's KKt4(g5) pawn exchanged B-for-Kt, removing Black's dark bishop on KR5(h4).
White's KB3(f3) Knight moves to K5(e5). Rare, given by Folke Ekström (b.1906) in a 1948 study.
    White  Black	White  Black
 1. P-Q4   P-Q4	     6.	P-K4   P-Kt4
 2. P-QB4  P-K3	     7.	P-K5   P-KR3
 3. Kt-QB3 Kt-KB3    8.	B-R4   P-Kt4
 4. Kt-B3  P-B3	     9.	PxKt   PxB
 5. B-Kt5  PxP!?    10.	Kt-K5!
Example ends: Undo or Jump or Clear