1, with a normal pot to cook chestnuts, boil over high heat, after 15 minutes or so, change to a small fire and then cook for 15 minutes can be used for about 30 minutes; with a pressure cooker to cook chestnuts, the time will be a little shorter, about 10-15 minutes.
2, cooking chestnuts in general hot water in the pot to cook than with cold water in the pot to cook with less time 5 minutes.
3, large chestnuts than small chestnuts to cook 5 minutes more.