Chess Board
[ECO code A23]
ENGLISH OPG. - Bremen (or Carls's) System
Keres Variation
White's Q4(d4) Knight under queen attack moves to QKt3(b3) and enables P-Q4.
Black's QB3(c6) Pawn takes White's doubled QP to complete the Q4(d5) trade, for an interesting game.
    White  Black	White  Black
 1. P-QB4  P-K4	     6.	PxP    Q-Kt3!
 2. Kt-QB3 Kt-KB3    7.	Kt-Kt3 PxP
 3. P-KKt3 P-B3
 4. Kt-B3  P-K5
 5. Kt-Q4  P-Q4
Example ends: or Undo or Jump or Clear