O mighty bowman, O son of Radha, if competent, do this. Making him turn back from the fight (by this means), strike him then. With his bow in hand he is incapable of being vanquished by the very gods and the Asuras together. If you wish, deprive him of his car, and divest him of his bow.'. Hearing these words of the preceptor, Vikartana's son Karna quickly cut off, by means of his shafts, the bow of Abhimanyu, as the latter was shooting with great activity. He, of Bhoja's race (viz., Kritavarman) then slew his steeds, and Kripa slew his two Parshni charioteers. The others covered him with showers of arrows after he had been divested of his bow. Those six great car-warriors, with great speed, when speed was so necessary, ruthlessly covered that carless youth, fighting single-handed with them, with showers of arrows. Bowless and carless, with an eye, however, to his duty (as a warrior), handsome Abhimanyu, taking up a sword and a shield, jumped into the sky. Displaying great strength and great activity,
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and describing the tracks called Kausika and others, the son of Arjuna fiercely coursed through the sky, like the prince of winged creatures (viz., Garuda.). 'He may fall upon me sword in hand,' with such thoughts, those mighty bowmen, were on the lookout for the laches of Abhimanyu, and began to pierce him in that battle, with their gaze turned upwards. Then Drona of mighty energy, that conqueror of foes with a sharp arrow quickly cut off the hilt, decked with gems, of Abhimanyu's sword. Radha's son Karna, with sharp shafts, cut off his excellent shield. Deprived of his sword and shield thus, he came down, with sound limbs, from the welkin upon the earth. Then taking up a car-wheel, he rushed in wrath against Drona. His body bright with the dust of car-wheels, and himself holding the car-wheel in his upraised arms, Abhimanyu looked exceedingly beautiful, and imitating Vasudeva (with his discus), became awfully fierce for a while in that battle. His robes dyed with the blood flowing (from his wounds), his brow formidable with the wrinkles visible thereon, himself uttering loud leonine roars, lord Abhimanyu of immeasurable might, staying in the midst of those kings, looked exceedingly resplendent on the field of battle.'"
when there are four warriors to merely cut his bow hilt and make him carless
how can it be called a fair fight????
Even if he cut his bow in a one on one then how can you call it a fair fight???