Was the deceased...SingleMarriedWidowed

What is the basis for the challenge?Not the deceased willWill invalidDeceased lacked capacity when he/she made their last willDeceased was coerced to change their willDeceased did not make proper provision for their children in their will /on their intestacyDeceased did not make proper provision for someone who had been living with them 2 years prior to their death in their will / on their intestacyOther reason for challenge