checkered

refers to an individual's background, often implying it contains questionable or controversial events.

refers to the past of a person, place, or thing that is varied and contains both good and bad periods.

describes a professional life with many changes, and a mix of successes and failures.

a flag with a pattern of black and white squares, waved to signal the winner or the end of a race.

a shirt with a pattern of squares in two or more different colors.