Hans Fahrni was a Swiss chess master.

In 1892 he was joint Swiss chess champion (with Corrodi).
In 1902, he took 12th in Hanover (DSB Congress

DSB Congress

The Deutschen Schachbund had been founded in Leipzig on 18 July 1877. When the next meeting took place in the Schützenhaus on 15 July 1879, sixty-two clubs had become member of the chess federation. Hofrat Rudolf von Gottschall became Chairman and Hermann Zwanziger the General Secretary...

, B tournament, Walter John

Walter John

Walter John , was a German chess master.John was born at Thorn , Poland . He took 2nd, behind Curt von Bardeleben in Café Kerkau, and took 4th at Berlin 1902. He won at Hanover 1902...

 won). In 1904, he won in Coburg (DSB-Congress, B tournament). In 1905, he tied for 2nd-3rd, behind Paul Leonhardt

Paul Leonhardt

Paul Saladin Leonhardt was a German chess master.He was born in Posen, Province of Posen, Poland , and died of a heart attack in Königsberg during a game of chess....

, in Hamburg. In 1905, he tied for 4-6th in Barmen (B tournament; Leo Fleischmann

Leó Forgács

Leó Forgács was a Hungarian chess player.-Biography:...

 won). In 1906, he took 15th in Ostend (Carl Schlechter

Carl Schlechter

Carl Schlechter was a leading Austrian chess master and theoretician at the turn of the 20th century. He is best known for drawing a World Chess Championship match with Emanuel Lasker.-Early life:...

 won). In 1906, he tied for 14-15th in Nuremberg (DSB-Congress, Frank Marshall won).

In 1909, Fahrni won, ahead of Savielly Tartakower

Savielly Tartakower

Ksawery Tartakower was a leading Polish and French chess Grandmaster. He was also a leading chess journalist of the 1920s and 30s...

, Semyon Alapin

Semyon Alapin

Semyon Zinovyevich Alapin was a Russian and Lithuanian chess master, openings analyst, and puzzle composer. He was a linguist, railway engineer and merchant .-Biography:...

 and Rudolf Spielmann

Rudolf Spielmann

Rudolf Spielmann was an Austrian-Jewish chess player of the romantic school, and chess writer.-Career:He was a lawyer but never worked as one....

, in Munich (Quadrangular). In 1911, he won in San Remo, took 4th in Munich (Quadrangular, Alapin won), and tied for 23-26th in Carlsbad (Richard Teichmann

Richard Teichmann

Richard Teichmann was a German chess master.He was known as "Richard the Fifth" because he often finished in fifth place in tournaments. But in Karlsbad 1911, he scored a convincing win, crushing Akiba Rubinstein and Carl Schlechter with the same line of the Ruy Lopez...

 won).

He was the first master to play 100 opponents simultaneously. It took place in 1911 at Munich.

In 1914, he tied for 7-8th in Baden bei Wien (Spielmann won), and tied for 13-14th in Mannheim (the 19th DSB-Congress, interrupted tournament, Alexander Alekhine

Alexander Alekhine

Alexander Alexandrovich Alekhine was the fourth World Chess Champion. He is often considered one of the greatest chess players ever.By the age of twenty-two, he was already among the strongest chess players in the world. During the 1920s, he won most of the tournaments in which he played...

 won first prize). In 1916, he tied for 4-5th in Triberg (Ilya Rabinovich

Ilya Rabinovich

Ilya Rabinovich was a Russian chess master.-Biography:In 1911 Ilya Leontievich Rabinovich tied for 1st with Platz in Saint Petersburg...

 won).

Fahrni played several matches. In 1907, he lost to Spielmann (+3 –5 =2) in Munich. In 1908, he drew with Alekhine (+1 –1 =1) in Munich. In 1908, he won against Gersz Salwe

Gersz Salwe

Gersz Salwe was a Polish chess player.-Biography:Salwe was born into a Jewish family in Warsaw ....

 (+3 –1 =1) in Prague. In 1910, he lost to Spielmann (+3 –4 =4) in Munich. In 1912, he won against Curt von Bardeleben

Curt von Bardeleben

Curt von Bardeleben was a Count and a German chess master who committed suicide by jumping out of a window in 1924. His life and death were the basis for that of the main character in the novel The Defense by Vladimir Nabokov, which was made into the movie The Luzhin Defence...

 (+3 –0 =1). In 1914, he drew with Leonhardt (+1 –1 =0). In 1916, he drew with Alex Selesnev

Alexey Selezniev

Alexey Selezniev was a Russian chess master....

 (+2 –2 =2) in Tiberg. In 1917, he lost to Teichmann (+0 –2 =2) in Zurich.

In 1916, suffering from psychosis, he was hospitalized. He was released, but following a relapse, he was hospitalized again.

In 1922, he was the first to write a chess monograph on the opening 1.e4 Nf6, calling it Alekhine's Defence

Alekhine's Defence

Alekhine's Defence is a hypermodern chess opening that begins with the moves:Black tempts White's pawns forward to form a broad pawn centre, with plans to undermine and attack the White structure later in the spirit of hypermodern defence. White's imposing mass of pawns in the centre often includes...

.

Books written by Fahrni

• Fahrni, Hans: Das Endspiel im Schach: lehrreiche Beispiele: mit hundert Diagrammen /gesammelt und kurz erläutert von Hans Fahrni, Leipzig 1917
• Fahrni, Hans: Die Aljechin-Verteidigung, eine schachtheoretische Analyse, Berlin, 1922
• FAHRNI , HANS & J.W. KEEMINK JR Het eindspel : handleiding voor schakers.