Spanish Game: Johannes Zukertort vs Adolf Anderssen 1865 - Berlin
[fen ""] [White "Zukertort"] [Black "Anderssen"] [Event "Berlin 1865"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. c3 d6 5. d4 Bd7 6. O-O Ng6 7. Ng5 h6 8. Nxf7 Kf7 9. Bc4 Ke7 10. Qh5 Qe8 11. Qg5 hxg5 12. Bg5#
To give my question some pre-text, my friend Mato has done a quick YouTube analysis on this Anderssen-Zukertort game here which dates back to 1860s Germany I believe: https://www.youtube.com/watch?v=wCV45-Kaxy0
Thought I'd ask this here: There's a truly astonishing queen sacrifice in a math practice game that my daughter has come home from scouts with (she's attending an Atlanta charter school), and it's got me thinking about whether Adolf Anderssen was the "world leading" unparalleled tactician that some 1980's chess theory books celebrate him as. I'll disclose that I hadn't seen this classic Zukertort game before, so you'll have to forgive me if there is an analysis line of thought on this somewhere that I haven't turned up on google yet.
The kids' math game itself is called Yamie Chess (its aimed at middle school kids and been done by the looks of things by a US Woman's chess master called Jennifer Shahade) and it basically frames the above old grandmaster chess line of Zukertort v Anderssen with the spanish opening--quite astonishingly--through a Disneyesque cartoon style story, that presents a series of math lessons and puzzles that kids have to solve all the while interactively re-enacting this Anderssen game on the board almost like passing nintendo levels to move on to the next chapter. But all done with chess. It's long too... 250+ pages to get through the whole Anderssen game.
My question relates to 8.Nxf7 in the late middle game.
So, 8.Nxf7... isn't that a weak move? If not, why not? I was thinking 8...Kxf7 9.Bc4+ Ke7?.. as Ke8 could give Black some advantage. I just think it seems weird that Anderssen didn't see this coming. What is going on?
I appreciated that the Yamie Chess comic doesn't labor this line, actually the comic somehow manages to combine 8.Nxf7--if you can believe it--with a section on transitive properties in school algebra. Dumbed down common core math, it ain't.