Table schema:
CREATE TABLE table_name_1 (course VARCHAR, location VARCHAR, year VARCHAR, country VARCHAR, to_par_ VARCHAR, a_ VARCHAR)

Question: With a year larger than 1905, and a location of philadelphia, pennsylvania with a to par [a] of n/a and a country of scotland what is the course?
SQL: SELECT course FROM table_name_1 WHERE to_par_[a_] = "n/a" AND country = "scotland" AND year > 1905 AND location = "philadelphia, pennsylvania"