zanzibar: Well, according to <Deutsche Schachzeitung (1872) N9 Sept p267/299*>this game was played on the last round on Saturday, July 27, 1872.
<The failure of the masters tournament was by all present with voltage
and especially looked forward to was during the decision struggle
between Anderssen and Neumann the crowd a big, which followed the game
on multiple Bretern [boards?]. They was. In the evening after 4 1/2
hour battle in the following position:
Weiss: Ke2; Tc2; Sf3; Bb3, d3, e4, g4, h3.
Black: Kd6; Tb3; La5; Bc5, d4, e5, f4, g5, h4.
aborted. Anderssen, on the course, offered a draw.
On Sunday, July 28 accepted the offer of the opponent.>
Since the periodical was edited by Anderssen, it should be considered accurate, and so the <CG> version of the game continues one extra move (*).
* * * * *
<Dem Ausfall des Meisterturniers wurde von allen Anwesenden mit
Spannung entgegengesehen und namentlich war während des Entschei
dungskampfes zwischen Anderssen und Neumann die Zuschauermenge
eine grosse, welche auf mehreren Bretern die Partie verfolgte. Sie
wurde. Abends nach 4/stündigem Kampfe in folgender Stellung:Weiss: Ke2; Tc2; Sf3; Bb3, d3, e4, g4, h3.
Schwarz: Kd6;Tb3; La5; Bc5, d4, e5, f4, g5, h4.
abgebrochen. Anderssen, am Zuge, offerierte Remis.
Sonntag, den 28. Juli, acceptierte Neumann das Anerbieten des Gegners.>
- - - - -
(*) OK, this raises a question in my mind.
>> If a move is sealed, but a draw is offered and accepted before the envolope is unsealed, should the sealed move become part of the game?
I don't think so... but I'm not 100% certain.
Of course, I'm unsure if they were even adopting the convention of sealing the move back in 1872. I tend to think not, but could a scholar advise?
If Anderseen gives this as the final position,
then I say that's the final position.
If play continued then of course White must play 54.Nxe5 for equality (well, maybe not so obvious to me without the help of an engine, I admit, but it does offer a path to advantageous simplification for White, who is defending).