When on account of love and devotional service for the Lord there is special valorous enthusiasm, the resultant activities are called chivalrous. These chivalrous activities can be manifested in the acts of mock-fighting, giving charity, showing mercy and executing religious principles. By performing chivalrous activities in fighting, one is called yuddha-vīra. By charitable activities one is called dāna-vīra. By showing extraordinary mercy one is called dayā-vīra. And when one is munificent in executing religious rites, he is called dharma-vīra. In all such different chivalrous activities, Kṛṣṇa is the object.
When a friend wants to satisfy Kṛṣṇa by performing some chivalrous activities, the friend becomes the challenger, and Kṛṣṇa Himself becomes the opponent; or else Kṛṣṇa may give audience to the fighting, and by His desire another friend becomes the opponent. A friend once challenged Kṛṣṇa thus: "My dear Mādhava, You are very restless because You think that no one can defeat You.