Chess Board
[ECO code C57]
TWO KNIGHTS DEFENCE - Fritz Var.
Gruber Variation
White develops his Queen to QR4(a4) to support his light bishop, planning exchanges on Q7(d7).
Black advances his KBPawn to KB4(f5) attacking White's K-side Kt. White retains a slight advantage.
    White  Black	White  Black
 1. P-K4   P-K4	     6.	P-QB3  P-Kt4
 2. Kt-KB3 Kt-QB3    7.	B-B1   KtxP
 3. B-B4   Kt-B3     8.	Kt-K4  Kt-K3!
 4. Kt-Kt5 P-Q4!     9.	BxP ch B-Q2
 5. PxP	   Kt-Q5    10.	Q-R4   P-KB4
Example ends: Undo or Jump or Clear