Thank you very much for all your help. Please let me know if you come across anything else.

So it is known amongst boxing fans in the Netherlands that Euwe enjoyed boxing? Did he compete at all do you know? Also, t is often mentioned in bios of Euwe (along with the false info he was amateur champ) that he wore boxing gloves for some of his games in the 1948 Chess World Championship tournam...

Thank you, I did know for sure that he was a boxing enthusiast, and even found a picture of him boxing. Can I ask how you know he was never amateur champ? Are their records of the amateur championships from the 1920's?

I am a chess writer and need help with verifying whether or not Max Euwe (who was Chess World Champion 1935-1937) was ever the European Amateur Heavyweight Boxing Champion, as is stated in numerous online bios of Euwe with no sources provided (eg. http://www.geocities.com/TimesSquare/Ring/4860/euwe....