And perhaps what had happened the night before would not ruin his chances.

I'm not this way in order to ruin your chances.

"If things hadn't turned out the way they did - even being careful you could have hurt him, and ruined his chance at music."

However, he ruined his chances with a series of writings on financial questions.

He wasn't deliberately trying to ruin his father's political chances.

Had I ruined my chance to put the plan into effect, even before I'd started?

Playing his hand now to save a few would ruin their chances of saving the entire city.

It prevents them from having a normal parent/child relationship, as the truth would ruin her one last chance.

She rose from her chair slowly, as if a sudden move might ruin their chances of good news.

These actions may have ruined his chances for advancement within the party.