|Giulio Campi, The Chess Players, Ca. 1530. Source: Web Gallery.|
On 5/11/1931, In Davar's chess column (p. 3), she is told by Marmorosh about the notation used in his column: 'check is designated by a cross...' and so on. This is not the same as being explained the rules of the game, of course; it is quite likely Ms. Bord was already a decent player, and only wanted a clarification about the notations.
As evidence, we submit that the very next week -- Davar, 12/11/1931, p. 3 -- Marmorosh notes her as one of the (correct) solvers of the previous week's chess problem, and is mentioned in later columns as a solver as well.