charusherri nambuthiri was lived on 15th century. He lived on the northern side of kerala with kolothiri.He was a gust of kolothiri .
The situvation to write the pome or krishnagatha was one day
was playing chathurangam [chess] with kolothiri .Kolothiri
was going fail in that .The play was seeing by his wife rani.
she was making baby to sleep .She gave a tip to kolothiri
for winning as a song for baby to sleep 'thu thu thu thu thu thu
thu thu thu aaleuthu' it means to push the soldier forwards.
By doing this kolothiri won the play and order cherusherri to make a pome on this tone. The tone used by rani.this was the situvation