Whoa, whoa, whoa.
First of all, anyone who knows anything about chess knows that a blunder is one move.
Does it spoil the rest of the game?
And the attack was nowhere near GM level.
I have better combinations than that!
Simply 16... Kxg7 17. Nh5+ Kg8 18. Qh6, 1-0, or 16... Re8 17. Qh6 followed by Ng5.
So why don't you explain why the planning is correct?
I am a big fan of the past masters, it was their creativity, originality of ideas and because of them we can play chess properly. Here is a game from Steinitz and Anderssen match 1966, a strong FIDE master comment on this game and he was completely wrong, he did not understand the middlegame planning and the attack was beyond his ability. It show that given Anderssen a chance to play against the current masters, they will be own by these past chess genius. Morphy would have no problems beating FIDE master, and I can safely say the same for Kolisch, Paulsen, Steinitz, Blackburne, Pillsbury, Tarrasch, Zukertort, and other great past masters.
If Fide master lack knowledge in such a game and could not form a correct plan, a Anderssen, Morphy, Steinitz and Blackburne and other past masters will crush these modern master. Opening mean nothing to a chess genius abilities. Many rated Anderssen a mere 2000 to 2100 elo, I NEVER seen a expert play in such high caliber, this attack is grandmaster level and Anderssen planning is very original. Players can have an opinion without facts and I bet they never played over any of the great past masters games, just blah, blah and more blah.
Morphy might have its weaknesses but he had incredible ability to understand a position, his calculation and imagination was unequal to any modern masters; to suggest that Morphy beat just patzers is to undermine his accomplishments. If you look at Paulsen, Bird and Anderssen games after 1860s, they improve tremendously and they contribute to opening, just Paulsen alone help develop the Sicilian defense and other opening and defenses.
All those doubters, IMs and GMs making one move blunders, very rare in a past master; their calculation was nearly perfect.
I have no doubt that Morphy will give a few lesson to this IM.