Ludwig Rellstab (23 November 1904 – 14 February 1983) was a German chess player who won the German Chess Championship in 1942 and was awarded the International Master title in 1950.^[1][2]

Rellstab was born in Schöneberg, Berlin to a distinguished family of academics and musicians. His great-grandfather, also named Ludwig Rellstab, was a well-known poet and music critic. His father Ludwig M. E. Rellstab was a professor of physics and electronics, who in 1914 became chief engineer at Siemens & Halske. His sister Annekäthe was a pianist.^[3]

He was German Champion, winning at Bad Oeynhausen 1942.^[4] He took 8th in the (unofficial) European Championship at Munich 1942 (Alexander Alekhine won).^[5] In 1943, he took 6th in Salzburg (Paul Keres and Alekhine won). In 1943, he took 5th in Vienna (10th GER-ch; Josef Lokvenc won).^{[citation needed]}

Rellstab represented Germany at fifth board in the Munich 1936 unofficial Olympiad, and won two bronze medals (team and individual).^[6] He played for West Germany three times in the Chess Olympiad.^[7]

• In 1950, at fourth board in 9th Chess Olympiad in Dubrovnik (+3 −2 =6);
• In 1952, at second reserve board in 10th Chess Olympiad in Helsinki (+5 −1 =3);
• In 1954, at fourth board in 11th Chess Olympiad in Amsterdam (+2 −2 =2).

He won the individual gold medal at Helsinki 1952 and team bronze medal at Dubrovnik 1950.^[7]

Rellstab was awarded the International Master (IM) title in 1950^[1] and the International Arbiter (IA) title in 1951.^[2] He died in Wedel in 1983.