How sodium attack got it's name


For the French it's the calcium attack.
Sodium is 11 btw and not 3
The Sodium Attack is also called the Durkin attack. Robert Durkin wrote his moves in as economical a way as possible. Because at move 1, the only square in the a-file to which a knight could move was a3, there was no need to include the number 3. So, he would write 1. Na.
By the way, Durkin was taught to play chess in summer of 1935 by Arpad Elo. Elo spent two months that summer, teaching chess to about 1,100 children in the playgrounds of Milwaukee.
The classes only lasted a week. However, after only one week, Elo wrote that 2 of the 1,100 children had the potential to become a master. Elo was right about Durkin.
By the time he graduated from high school, Durkin played blindfold simuls around Milwaukee. He did okay in a couple of invitational tournaments, even finishing ahead of Elo in the Great Lakes Invitational in 1941.