Kane Williamson and tailender Ish Sodhi dug in  much to the frustration of Pakistan as New Zealand moved ahead by 81 runs on the third day of the first cricket test on Thursday.

Williamson, who completed his first test hundred in almost two years late on Day 2, was not out on 137 off 308 balls while Sodhi was unbeaten on 41 off 127 balls in his comeback test match after four years.