Vsevolod Alfredovich Rauzer, also spelled Wsewolod Rauser (Russian: Всеволод Альфредович Раузер; 16 October 1908 — 29 December 1941) was a Soviet Ukrainian chess master known for his great contributions to chess opening theory, especially of the Sicilian Defence.
He took sixth at Leningrad 1933, the 8th USSR Chess Championship, won by future World Champion Mikhail Botvinnik.
The Richter–Rauzer Variation of the Sicilian Defence (also known as the Richter–Rauzer Attack), was named in honor of him and the German master Kurt Richter.
Rauzer did pioneering work in methods of attacking the Sicilian Dragon by castling queenside.
The knight typically travels on the circuit b1–d2–f1–e3–d5 and this attack can be powerful even if it results in a sacrifice of White's e-pawn.