Isaac Oskarovich Lipnitsky (Ukrainian: Ісаак Оскарович Липницький; 25 June 1923 – 25 March 1959)[1] was a Soviet chess master.

Lipnitsky served in the Soviet Red Army, fought in the Battle of Stalingrad, and was decorated four times.

Lipnitsky's first result of note after the war in high-level competition was a tie for 5th–8th places in the 1948 Ukrainian Championship at Kyiv with 11/18, only half a point behind winner Anatoly Bannik, another childhood rival from the Kiev Junior Chess Club.

Lipnitsky had by far the best result of his career at Moscow in 1950 at the URS-ch18, where he scored a superb 11/17 (+8 −3 =6), to tie for 2nd–4th places, along with Lev Aronin and Alexander Tolush, only half a point behind champion Paul Keres.

Very few Soviet players got the chance to compete internationally during those years, and invitations were controlled by the USSR Chess Federation.

Lipnitsky achieved victories over most of the top Soviet players of his era during his peak years from 1948–56, including Paul Keres, Vasily Smyslov, Tigran Petrosian, Alexander Kotov, Yuri Averbakh, Igor Bondarevsky, Mark Taimanov, Efim Geller, Semyon Furman, Lev Aronin, Alexei Suetin, Ilya Kan, and Evgeny Vasiukov, among others.

He had a wide opening repertoire with both colours, and his style was positional in nature, with tactics not dominating, but flowing from the situation.