Chess Board
[ECO code C92]
The Keres Variation

White's KRP push stopped a 10..B-Kt5 pin threat.
Black moves his QR3(a6) Pawn onward to QR4(a5) planning ..P-R5. A rare but interesting move used by Paul Keres and Bondarevsky. B-Alt.
    White  Black	White  Black
 1. P-K4   P-K4      6.	R-K1   P-QKt4
 2. Kt-KB3 Kt-QB3    7.	B-Kt3  P-Q3
 3. B-Kt5  P-QR3     8.	P-B3   0-0
 4. B-R4   Kt-B3     9.	P-KR3  P-QR4?!
 5. 0-0    B-K2

Example ends: Undo or Jump or Clear