1.e4 e5 2.Nf3 Nc6 3.Bb5 f5!?

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http://www.chessgames.com/perl/ches...

from Leonid Shamkovich & Eric Schiller's book Spanish - Schliemann Jaenisch..

<The little-known Dr. Adolf Schliemann contributed much to the theory in a series of articles published in the 1860's. These would hardly have been sufficient to merit the naming of the opening after him, but fate intervened in the form of East-West rivalry, and now the opening is called the Schliemann Defence in English-speaking countries and the Jaenisch Gambit elsewhere. Although the authors prefer the latter term, both titles are used interchangeably in the present work.>

There was also this:

<Schliemann was an expert chess champion of strength. In Schwerin he founded in 1859 a chess club, which was the center of the Mecklenburg chess life, and organized each year end tournaments. [18] As president of the Schwerin Schachgesellschaft he visited in November 1863, the Berlin Chess Club and played 19 games against the champion Carl Mayet, Samuel Lousy and Gustav Neumann.>

<Under the Schliemann Defense or the Jaenisch Gambit is now the variation of the Ruy Lopez in the opening theory 1. e2-e4 e7-e5 2. Sg1-f3-c6 3. Sb8 Lf1 f7-f5 -B5 understood what has been already investigated in 1847 by Carl Jaenisch. [23]

Schliemann himself in an essay of 1867, however, in the Cordel Defense 1. e2-e4 e7-e5 2. Sg1-f3 Sb8-c6 3. Lf1-b5 Bf8-c5 after 4 c2-c3 f7-f5 (chart) recommended.>

http://de.wikipedia.org/wiki/Adolph...

<"Schliemann and the California Gold Rush: The 1850-1852 American travel ..." By Wout Arentzen, Christo Thanos>

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

Adolph Schliemann's Wiki page:

https://de.wikipedia.org/wiki/Adolp...

Confirms his cousin was Heinrich Schliemann (1822 - 1890) who was a famous archaeologists credited with discovering the ruins of Troy. (the scene of the first Greek Gift)

Alan Smith 'Quotes & Queries' No 6092 (BCM June 2017):

Quite how Schliemann’s name became attached to 3...f5 in the Ruy Lopez is a mystery. He was the author of another defence 3...Bc5 4.c3 f5 which is now named after Cordel, who never played it!

Here is the stem game of that line:

[Event "Schwerin"]
[Date "1867.??.??"]
[White "Kade"]
[Black "Schliemann, Adolph Karl Wilhelm"]
[Result "0-1"]
[ECO "C64"]
[PlyCount "36"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 f5 5. d4 fxe4 6. Bxc6 dxc6 7. Nxe5 Bd6 8. Qh5+ g6 9. Nxg6 Nf6 10. Qh4 Rg8 11. Ne5 Bxe5 12. dxe5 Qd3 13. h3 Be6 14. exf6 O-O-O 15. Bd2 e3 16. f7 exd2+ 17. Kd1 Bxf7 18. Qf4 Bxa2 0-1

Source: Schachzeitung January 1868, p.22-23.

Schliemann's call name was Adolph, but in fact <Wilhelm Karl Adolph> was his right first name...