The following, I'm positive, will generate a lot of discussion:
1. P-K4 P-K4
2. P-KB4 PxP
3. Kt-KB3 P-KKt4
4. B-B4!? P-KKt5
5. 0-0! PxKt
6. QxKt Q-B3
7. P-K5! QxP
8. BxP ch.!! KxB
9. P-Q4 QxP ch.
At this point, the supposed ‘known refutation’ was 9. …Q-B4?! However, the only White move which was considered was 10. P-KKt4?!, which although it yields an attack, weakens the kingside. If White continues instead 10. BxP!! Then Black only yields disadvantages from not capturing the pawn, as it can support a piece later.
10. B-K3! Q-B3
This is the main position of the Double Muzio Gambit, which is remarkable in that there is no refutation and no forced win! There are endless possibilities in such a double edged position, most being slightly favourable to White, but not all, much like any other opening. This one, however, is much more interesting and fun to play.
Morphy played 11. Q-R5 ch. !! in one of his brilliancies, however, this move would lose its exclamation points if played normally, since in his game he was playing without the queen’s knight! In this position, NOT having a knight is actually preferable, for it leads to the queen’s rook coming into play a move sooner.
It must be mentioned that for the practical gambiteer, 4. B-B4!? is probably inaccurate, as although 4. …P-KKt5 must be THE move to play, instead Black can play a Hanstein gambit with 4. …B-Kt7. However, 4. P-KR4! Should lead to an Allgaier gambit, which is just as fun if not quite as exciting.