Chess Board
[ECO code C46]
THREE KNIGHTS OPENING
Winawer Defence
Black's QP advance to the centre doubled his KP support and attacked White's light bishop.
White's Q-side Knight removes Black's QPawn on Q5(d5) for advantage - the stemgame Breyer-Balla, Pistyan 1912 that destroyed Winaver popularity.
    White  Black	White  Black
 1. P-K4   P-K4	     5.	KKtxP  Kt-B3
 2. Kt-KB3 Kt-QB3    6.	B-QB4  P-Q4
 3. Kt-QB3 P-B4!?    7.	KtxQP!
 4. P-Q4   BPxP
Example ends: Undo or Jump or Clear