Chess Board
[ECO code A00]
ORANG-UTAN OPENING
"King's Pawn" Variation
White develops his Queen's Rook to QB1(c1), doubling his QKt defence so as to protect his QRP.
Black's QKtPawn push to QKt3(b6) defends his half-open QKt-file, for ..B-Kt2 and ..Kt-K2 equality.
    White  Black	White  Black
 1. P-QKt4 P-K4	     6.	P-B4   P-B4
 2. B-Kt2  BxB!	     7.	Kt-B3  Kt-B3
 3. BxB	   Kt-KB3    8.	BxKt   BxB
 4. Kt-KB3 0-0	     9.	R-B1   P-QR3
 5. P-K3   B-K2
Example ends: Undo or Jump or Clear