Nicolaas Cortlever

Nicolaas Cortlever was a Dutch chess master.
He tied for 7-8th at Rotterdam 1936 ; took 2nd at Amsterdam 1938 ; won at the 2nd Hoogovens Beverwijk 1939 ; tied for 4-6th at Amsterdam I and 3rd-4th at Amsterdam II in 1939.
During World War II, he tied for 2nd-3rd at Beverwijk 1940 ; shared 1st with Landau and Lodewijk Prins at Leeuwarden 1940; took 2nd, behind Arthur Wijnans at Beverwijk 1941 ; tied for 14-15th at Munich 1941.
After the war, he took 4th at Beverwijk 1946 ; tied for 2nd-3rd at Zaandam 1946 ; took 2nd at Beverwijk 1947 ; tied for 8-9th at Beverwijk 1948 ; took 4th at Beverwijk 1950.
He took 4th at Amsterdam 1950 ; tied for 7-9th at Enschede 1952 ; tied for 9-10th at Beverwijk 1953 ; tied for 2nd-3rd at Amsterdam 1954 ; took 2nd, behind Donner, at Amsterdam 1958.
Cortlever represented The Netherlands in Chess Olympiads:

In 1936, at eighth board in 3rd unofficial Chess Olympiad in Munich ;
In 1939, at second board in 8th Chess Olympiad in Buenos Aires ;
In 1950, at fourth board in 9th Chess Olympiad in Dubrovnik ;
In 1952, at fourth board in 10th Chess Olympiad in Helsinki ;
In 1954, at third board in 11th Chess Olympiad in Amsterdam.

He won individual silver medal at Dubrovnik 1950.
Cortlever was awarded the International Master title in 1950.