Chess Board
[ECO code B13]
CARO-KANN DEF. - Panov-Botvinnik Attack
The Czerniak Variation

White's QB half-pinned Black's king's-side knight.
Black develops his Queen to QR4(a5) defending his KP, a Keres-Czerniak, Buenos Aires Olympiad 1939 line tending to give White advantage. B-Alt.
    White  Black	White  Black
 1. P-K4   P-QB3     6.	B-Kt5  Q-R4
 2. P-Q4   P-Q4
 3. PxP	   PxP
 4. P-QB4  Kt-KB3
 5. Kt-QB3 Kt-B3

Example ends: Undo or Jump or Clear