Table: whitworth_championships
Columns: year
championship
winning_score
margin
runner_s_up

Question: Which championship had a margin of 10 strokes?
SQL: SELECT "championship" FROM whitworth_championships WHERE "margin" = '10 strokes'

Question: Which runner-up player(s) had a margin of 10 strokes?
SQL: SELECT "runner_s_up" FROM whitworth_championships WHERE "margin" = '10 strokes'

Question: What was the most recent year that Kathy Ahern was a runner-up?
SQL: SELECT MAX("year") FROM whitworth_championships WHERE "runner_s_up" = 'kathy ahern'