Allowing fried liver attack.

@NeverBeenTimid I disagree with Mr. Mike Kummer and find the Two Knights Defence recommended for amateurs as it leads to interesting, unbalanced positions where one side has more material and the other side enjoys the initiative. Most top grandmasters however nowadays avoid the Two Knights Defence and play 3...Bc5 instead.
@MoistvonLipwig You scorn Sulskis for missing 11...Qh4, but then you could reproach Shirov for entering into 9 a3 just the same. Maybe Shirov had prepared something against 11...Qh4, but maybe Shirov was unprepared for 5...Nxd5. Maybe Sulskis feared some preparation after 11...Qh4, but maybe he was unprepared for 9 a3.
@trickynick There is no need to change openings because of the tame 4 d3. There is plenty of play for black. Only the variations with 4...Bc5 and 5...d6 lead to the Giuoco Pianissimo, which is Italian for very slow play.

In my opinion the Two Knights is a good opening. However the Fried Liver Attack or the Lolli Attack is a bad variation for black. Is not a force win or a easy win for white but white has more chances that in the starting position.

www.youtube.com/watch?v=BQwEyr5qwws

The backyard professor wasn't scared of the fried liver attack.

"what he's doing is a one and two piece attack"
"This is a lousy way to play chess"
"When you get to tournament you are gonna get your butt kicked. Just like I kicked his, if this is how you play chess"

@tpr 4. d3 Bc5 seems like like Black's best move to me. The d pawn is going to have to go to d6 because d5 is too well defended and if Black doesn't get that bishop outside the pawn chain before it closes he won't be able to develop it to a square where it has any kind of activity.

@trickynick
Black can play otherwise, example:

@tpr I don't know what Shirov was planning. Maybe he wanted to play Qh4 d3 which is interesting at least.
However Kd6 is known to just lose for black so even if you fear some secret prep you still NEED to go for Qh4. (or maybe c6 IIRC)
And a3 is the move that has always been considered to be critical, if you aren't prepared against a3, don't play Nxd5.
(Kd6 has been known to be lost for a century I think; just back then people didn't know about Qh4 so they thought that Nxd5 loses alltogether)

My reason is after that nb4 move in the main line white top 3 replies can be refuted easily

@howchessYT I do not see any refutation neither a hard one nor an easy one. White is a knight down, but has a strong attack for it. It can go either way and usually the stronger player wins. Consensus among grandmasters is that white is better, as hardly any of them risks 5...Nxd5.