Rutuparna : Rutuparṇa was a king ofAyodhya, and son of Sarvakama, into whose service king Nala entered after he had lost his kingdom. Rutuparna was a master mathematician and profoundly skilled in dice Kali. Nala, as Bahuk became a minister and later the charioteer in King Rituparna's court on the advice of the King ofSnakes to learn from him the skills of dice. According to the story of Nala-Damayanti of Mahabharata, after the disappearance of King Nala, his queen, Damayanti and her father's courtiers sent out a search party to find him. One of the courtiers reported a person "resembling in behaviour, but not in features" with Nala in King Rutuparna's court in Ayodhya. To test this fact it was proclaimed that Queen Damayanti had assented to remarry, and consequently an invitation to a swayamvara for the same was sent to Rutuparna's court too. However the swayamvara, was scheduled for the very next day, and the distance to her father's kingdom from Ayodhya could not be covered in a night. For this Nala as Bahuk offered to transport King Rutuparna to Damayanti's kingdom. As Nala was the best charioteer Nala he was sure to reach Damayanti's father's palace in time for the swayamvara. On the way King Rutuparna asked Nala or Bahuk, as he was known to him, for the secrets and techniques of fast chariot driving. Nala agreed but in return for which he asked the knowledge and techniques of dice playing, in which Rutuparna was the master. Thus on a mutual acceptance, within a night's journey Rutuparna taught Dice-playing to Nala and Nala taught him chariot driving skills. On reaching Damayanti's father's palace, however, king Rutuparna was informed that the swayamvara was a sham and actually a ploy to find Nala, who indeed came back to his own form from that of Bahuk using a boon from the snake king. And using the art of Dice learnt from Rutuparna in the previous night's journey, Nala defeated his brotherPushkara in dice and became the king of Nishadha Kingdom again. The story does not cite anything else about King Rutuparna after this episode .
