CREATE TABLE table_name_14 (date VARCHAR, to_par VARCHAR, tournament VARCHAR, margin_of_victory VARCHAR)
Which Date has a Tournament of at&t pebble beach national pro-am, and a Margin of victory of 1 stroke, and a To par of –11?
SELECT date FROM table_name_14 WHERE tournament = "at&t pebble beach national pro-am" AND margin_of_victory = "1 stroke" AND to_par = "–11"