Million To One Chance has these relationships to other tropes:

parents kids shares a parent with:
If My Calculations Are Correct
Theory Of Narrative Causality
Never Tell Me The Odds
parent child
Theory Of Narrative CausalityThe Good Guys Always Win
''Underdogs Never Lose
''Youngest Child Wins
''Finagles Law
''Anthropic Principle
''Your Princess Is In Another Castle
You'll need to Get Known if you want to add or modify these relationships.