Chess Board
[ECO code C22]
CENTRE GAME - Winaver Var.
The Keres Variation
White developed his king's bishop to QB4(c4) to target Black's weak KBP, purposely allowing ..KtxP.
Black's QB3(c6) Knight to QR4(a5) attacks the light B, enabling 9.B-K2..P-Q4! equality. First suggested by Paul Keres (1916-75). B-Alt.
   White  Black		White  Black
 1. P-K4   P-K4	     6.	B-Q2   0-0
 2. P-Q4   PxP	     7.	0-0-0  R-K1
 3. QxP    Kt-QB3    8.	B-B4   Kt-QR4!
 4. Q-K3   Kt-B3!
 5. Kt-QB3 B-Kt5
Example ends: Undo or Jump or Clear