Possible Clues:

• 'The pot's all yours'
• "How can ___?" ("A victory is certain")
• 'Oh, well, that's the game'
• Defeated person's admission
• 'How can --?' ('This is a sure bet')
• "How can ___?" ("This is a sure bet!")
• Flip response?
• 'You beat me'
• "No prize for me this time"
• ''You defeated me''