Defiant centuries from Soumya Sarkar and Mahmudullah were in vain as Trent Boult's five-wicket haul gave New Zealand a crushing victory over Bangladesh in the first Test by an innings and 52 runs here yesterday.

After the stubborn double-century partnership took Bangladesh to 361-4 in their second innings, Boult opened the final chapter of the Test when he bowled Soumya for 149. The crucial wicket ended a 235-run stand with Mahmudullah (146) for the fifth wicket and saw Bangladesh cave in with the Test all over 68 runs later, just after tea on Day Four.