Carl Friedrich Andreyevich von Jaenisch
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Tschigorin had written in 1880: "In the chess world there are not a lot of names with such a wide and well-deserved reputation as the that of our compatriot Carl A. Jaenisch."
Carl von Jaenisch
Jaenish, a railroad engineering graduate, an associate professor of mechanics and member (Major) of the Army Corps of Engineers, abandoned his careers at age 27 to devote his time to chess. Unable to support himself fully through chess, he took employment in the Ministry of Finance but continued on with his chess obsession.
Chessgames.com is a superlative resource, but the games there, while 95% accurate, sometimes give erroneous dates, player names, venues, etc. , sometimes the total games are incomplete, making the database a springboard more than a definitive source.
I love Edo Historical Chess Ratings for several reasons, foremost of which is that Mr. Edwards supplies his incredible array of sources for his data. Below is the Edo summation of Jaenisch's results (with a link to the pages - click on the year - explaining how each result was ascertained):
Other sources give slightly different results. But all sources seem to agree that Jaenisch's had a slight overall minus recorded score against Ilya Shumov (Shumoff). Jaenish also had a slightly minus recorded score against Petroff, but we also had recorded games of Petroff offering Jaenisch odds of Pawn and Move.
Below is a game between Jaenisch "and one of the first Players in Russia." c. 1842.
At that time Howard Staunton had sent an invitation to the better Russian players to take part in the International tournament in London. Jaenisch reponded to the invitation with a conditional acceptance, not knowing he would be able to make it in time. He added that Kireevsky (probably Ivan Vasilievich Kireevsky, the Russian writer) wouldn't be able to participate, but he was hopeful that Shumov would. He added that he forwarded the invitation to Petroff in Warsaw. It turned out that, while niether Petroff nor Shumov could attend, Jaenisch could but arrived too late to participate in the tournament itself. However, he did play a set match with Howard Staunton, losing quite badly +2-7=1. He seemingly played off-hand games with other notable players, such as Augustus Mongredien. One of Jaenisch's games with Hugh Alexander Kennedy, presented below, was preserved in the tounament book.
Jaenisch tied a short match with Prince Sergey Urusov (+2-2) in 1854. Although vol. 3 (1851) of the "Chess Player's Chronicle" names Dr. Carl Otto Rosenberger as the fourth strongest Russian player, surely Prince Urusov had strong claim to that position.
A curious side note is that in his 1862-3 series, "Treatise on the Application of Mathematical Analysis in the Chess Game," Jaenisch, in response to the 8 Queens Puzzle proposed in 1848 and partially solved in 1850, suggested a 5 Queen puzzle. The nature of both puzzles is that the Queens must cover all the squares on the board (in the 8 Queens puzzle however, there are two variations, one that required the Queens to cover each other, one that forbids it). In looking into this mathematical puzzle, I came across a solution presented by none other than the Puzzle Master himself, Sam Loyd:
"American Chess Journal" 1876
"Mr, Loyd gives the following as the solution to the Queens Puzzle of last month, to-wit : to place five Queens on the board so that every square shall be guarded. No (other) correct solutions were received, as our solvers overlooked the necessity of guarding the squares occupied by the Queens."
Carl Friedrich Andreyevich Jaenisch died in St. Petersburg on March 7, 1872.