Question: why did yudhishthira bet draupadi?
Answer: Neither as a husband. But as a king and for the welfare of the kingdom, he can bet anything and he holds the right to bet anyone. So he bet his brothers and lost them too. ... Then Duryodhana ordered his slave Yudhishthir to bet his wife Draupadi against his own wife (Bhanumati, the princess of Varanasi).