Possible Clues:

• Eye-for-an-eye act
• Rare slip may produce an aggressive response
• Unusually rare slip can result in retaliation
• Retaliatory action causing material and title be returned to nearly all
• Pair is trapped by proper revenge attack
• Pawn above king is captured by genuine act of retaliation
• Payback of sorts
• Retaliatory deed
• The way to get your own back
• Counterblow