What is Viparitha Raja Yoga?

Answer 1

Viparita Raja Yoga.

This yoga is a case of "two bads making a good". If two rulers of dustana houses are together in any house or in mutual aspect or in parivartana, and neither planet is with or aspected by any other planet.

This yoga can indicate a rapid rise in life, or adversities turning into benefits (the lemons to lemonade effect) especially when the dasa and bhukti of the both planets occurs.

Hart says that the benefits of this yoga are indicated by the house position of the nakshatra dispositor of one or both planets, and that the yoga is of less benefit (i.e. more negative) if both planets are weakly conditioned.