Boris Mikhailovich Koyalovich (Koyalovitch, Kojalovich, Kojalowitsch, Kojałowicz) (March 2, 1867 – December 29, 1941) was a Russian

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

 mathematician

Mathematician

A mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....

 and chess master

Chess master

A chess master is a chess player of such skill that he/she can usually beat chess experts, who themselves typically prevail against most amateurs. Among chess players, the term is often abbreviated to master, the meaning being clear from context....

.

He was a professor of mathematics at the Saint Petersburg State Institute of Technology

Saint Petersburg State Institute of Technology

Saint Petersburg State Institute of Technology is one of the oldest institutions of higher education in Russia , it currently trains around 5000 students.-History:...

. In 1930, he developed the special theory of limitants.

Koyalovich lived and died in St. Petersburg (also known as Petrograd and Leningrad during his lifetime). He played in many of the city's chess tournaments, taking 4th place in 1901 (Sergey Lebedev

Sergey Lebedev

Sergey Fedorovich Lebedev was a Russian chess master.S.F. Lebedev lived in Saint Petersburg before World War I, during and after the war . He took 4th at Moscow 1899 , took 3rd at St...

 won), 3rd in 1902 (Mikhail Chigorin

Mikhail Chigorin

Mikhail Ivanovich Chigorin also was a leading Russian chess player...

 and Alexander Levin won), and 11th in 1903 (Grigory Helbach

Grigory Helbach

Grigory Helbach was a Russian chess master.He tied for 6-7th at Moscow 1899 , took 6th at St. Petersburg 1900 , shared 1st with Sergey Lebedev at St. Petersburg 1901, took 7th at St...

, Krzyzanowski and Emmanuel Schiffers won). In 1904 he competed at three events, tying for 4-5th in one (Eugene Znosko-Borovsky

Eugene Znosko-Borovsky

Eugene Alexandrovich Znosko-Borovsky was a Russian chess master, music and drama critic, teacher and author. Born in Saint Petersburg, he settled in Paris in 1920, and lived there for the rest of his life.-Biography:...

 won), taking 5th in another (Chigorin won), and winning the third. He tied for 4-5th in 1905 (Chigorin won), tied for 8-9th in 1906 (Simon Alapin won), and tied for 5-6th in 1907 (Sergey von Freymann

Sergey von Freymann

Sergey von Freymann was a Russian-Uzbekistani chess master.In 1906, von Freymann took 2nd, behind Semyon Alapin, in Sankt Petersburg. In 1907, he tied for 6-7th in St Petersburg . In 1907/08, he took 5th in Lodz . The event was won by Akiba Rubinstein...

 won).

He played in a friendly match St. Petersburg vs. Moscow in 1911 (won a game against Parfenov on board 7), and won a game against 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...

 in St. Petersburg in April 1912.

After World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

, he tied for 5-9th at Petrograd 1921 (R.R. Platz won), took 6th at Novgorod 1923/24 (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), took 9th at Leningrad 1925 (Solomon Gotthilf

Solomon Gotthilf

Solomon Borisovich Gotthilf was a Russian chess master.He shared 3rd in the 1922 Leningrad City Chess Championship , took 6th in Leningrad City-ch in 1924, won twice at Leningrad 1925, shared 6th at Leningrad 1925 , took 3rd at Leningrad 1925 Solomon Borisovich Gotthilf (January 1903 - December...

 won), and tied for 6-7th at Leningrad 1925 (Efim Bogoljubow

Efim Bogoljubow

Efim Dmitriyevich Bogolyubov was a Russo-German chess grandmaster who won numerous events and played two matches with Alexander Alekhine for the world championship.-Early career:...

 and Peter Romanovsky

Peter Romanovsky

Peter Arsenievich Romanovsky was a Russian chess International Master, International Arbiter, and author.-Biography:At the beginning of his career in Sankt Petersburg, he shared fourth place in 1908 , tied for 10-11th in 1909 , took second place behind Smorodsky in 1913, and shared first with...

won).