"In top-class chess it is rare for a player to complete a tournament or match with a 100 percent score. This result was however achieved in tournaments by:

<DEATH OF HERR NEUMANN.

The Field regrets to learn from the Berlin Sonntagsblatt the death of Herr G. R. Neumann. The deceased was one of the greatest players of our time, having first developed his fine gifts in practice with Anderssen, Dufresne, Paulsen, and other masters of the Berlin school. In the first Paris tournament of 1867, he only won the fourth prize, but immediately afterwards he beat the second winner, Herr Winawer, in a match of four games, without losing any. In the same year he won the chief prize of the first-class tournament in the Chess Congress held at Dundee. During his subsequent residence in Paris, he beat M Rosenthal in two matches, without losing a single game to his adversary, who only succeeded in scoring several draws. His last appearance in public took place in Baden in 1870, where he tied with Mr Blaokburne for the third prize. Herr Neumann was also a prolific author on the game, both in the German and French languages. He was editor of the Neue Berliner Schachzeitang for several years, and notable amongst his works are "Handbuch des Schachspiels," brought out in conjunction with Dr Suhle, and the book of the Paris Chess Congress of 1867, which he edited with M Arnous de Riviere. He had been suffering from mental affliction for several years, which caused his retirement from the game, and though his death took place in February last, it only became known to his German Chess friends a few weeks ago. His loss will be deeply regretted by lovers of the game all over the world.>

https://books.google.com/books?id=K...

Plus, it irks me I couldn't find anything funny, weird or informative with 42 points to set up a couplet.

The great German Chess Historian Michael Negele about Gustav Neumann: http://www.schachbund.de/news/gusta...

A new McFarland book by Hans Renette & Fabrizio Zavatarelli was published:

'Neumann, Hirschfeld and Suhle - 19th Century Berlin Chess Biographies with 711 Games'

(https://mcfarlandbooks.com/product/...)

...

Hans Renette (Some outtakes of my second book):

... I learned about Neumann from the great Anderssen biography by Von Gottschall. They played a huge number of fascinating games against each other. But I was always most impressed by Neumann's win against Steinitz at the Paris 1867 tournament (Steinitz vs G Neumann, 1867). It is an incredible game, and I'll give it here with condensed notes.

But first a word from Neumann himself in which circumstances he played this epic struggle that lasted 11 hours.

[The game] began around three o’clock of a very sultry afternoon. A violent storm burst soon after, but we [Neumann and Steinitz], spirited by true enthusiasm for chess, do not realize both the raging of nature and the hour of sunset, which we let pass with poor refreshment.” [Schachzeitung, November 1869, p. 326]...

Source: https://www.chess.com/blog/like-a-h...

Gustav Neumann at Berlin in 1865 (34/34)[42]
...
Bobby Fischer at the US Championship of 1963/64 (11/11)">

This is very interesting speculation.