and drew (+4 –4 =2) matches against Johannes van den Bosch. He represented his adopted country on fourth board in 3rd Chess Olympiad at Hamburg 1930 (+5 –7 =3), and on second board in 7th Chess Olympiad at Stockholm 1937 (+5 –2 =8). In 1933, he tied for 4th–6th at Scheveningen (Flohr won). In February 1934, he took 2nd, behind Alexander Alekhine, at Rotterdam (Qudragular). In October–December 1935, during the World Championship match between Alekhine and Euwe in the Netherlands, Landau served as official second for Alekhine. In May 1936, he tied for 3rd–4th at Ostend. In July 1936, he tied for 7th–9th at Zandvoort. In 1936, he lost two matches against Spielmann, at Amsterdam (+0 –4 =4), and at Zandvoort (+1 –3 =3). In 1936, he tied for 4th–6th at Hanover. In October 1936, he tied for 1st with Alekhine at Amsterdam (Quadrangular). In October 1936, he tied for 4th–6th at Amsterdam. In 1936, he won the 10th Dutch national championship (although the world champion, Euwe, did not compete). In April 1937, he tied for 4th–5th at Ostend. In June–July 1937, he tied for 15th–16th at Kemeri, but won the best game prize. In June 1938, he tied for 5th–6th at Noordwijk. In 1938, he tied for 5th–6th at Amsterdam (11th Dutch ch.). In November 1938, he was the referee in famous AVRO Tournament. In 1938/39, he tied for 3 rd-4th with Vasja Pirc, behind Szabo and Euwe, at Hastings. In 1939, he tied for 4 th-6th at Amsterdam (KNSB), shared 1st with Euwe at Amsterdam (VARA) took 3rd at Baarn B, tied for 4th–5th at Barnemouth. In 1939 he also drew a match against Theo van Scheltinga at Amsterdam (+3 –3 =4), drew a match against László Szabó at Amsterdam (+2 –2 =6), won at Amsterdam (the 12th NED-ch), and lost a match for the Dutch Champion title to former World Champion Euwe (+0 –5 =5). During World War II, in 1940, he won at Baarn (Quadrangular), took 4th at Delft (Quadrangular), tied for 3rd–4th at Amsterdam (VAS), tied for 4th–7th at Rotterdam (Kamstra Cup), and tied for 1st–3rd with Nicolaas Cortlever and Lodewijk Prins at Leeuwarden. In 1941, he won at Groningen. Attempt to escape the Nazis; Concentration camp Finally, in September 1942, Landau tried to escape the Nazis by fleeing to Switzerland with his family, but they were caught on September 28 in Breda, near the