During World War II , he lost a match to Euwe ( +2 − 5 = 3 ) at Krefeld 1941 , and drew a mini-match with Alekhine ( +1 − 1 = 0 ) at Warsaw 1943 .
During World War II , he lost a match to Euwe ( +2 -5 = 3 ) at Krefeld 1941 , and drew a mini-match with Alekhine ( +1 -1 = 0 ) at Warsaw 1943 .