The phrase "a difficult chore and" is correct and usable in written English.
It can be used when describing a task that is challenging or burdensome, often in a list or comparison with other tasks.
Example: "Cleaning the garage is a difficult chore and takes up most of my Saturday."
Alternatives: "a challenging task" or "a tough job".
The Red Sox have a difficult chore in trying to trade an unhappy Manny Ramírez, and they will not find a home for him in Philadelphia.
Yet we all know that we practice the things we love, and we avoid the things that feel like a difficult chore.
Making up the ferrells, cutting the cables to the correct length, and threading cables cut with pliers through the clamps is a difficult chore.
It's a difficult chore that his predecessor, Dan Glickman, the former nine-term congressman from Kansas, had mixed success in pulling off.
But emotionally, the paperwork of death was a difficult chore for those who went to the city's Family Assistance Center yesterday to apply for death certificates for family members, even though, without the absolute proof of a body, the faintest uncertainty lingered as to their loved ones' fate.
The World Cup draw won't be held until Friday, but already the U.S. appears to be facing a difficult chore if it hopes to advance out of group play in Brazil next summer.
When a pitcher who is as dangerous as Sabathia repeatedly jumps ahead of hitters, he makes an already difficult chore more arduous.
They are questions of causality – and as any good lawyer knows, establishing a chain of causality is often the most difficult chore in a case.
Tense, conflicted and involving, O'Dell's novel deftly captures the voice of a teenage boy who's in trouble and facing profound challenges, even if the narrative sometimes feels dramatically inflated in order to prove its point: that evil runs deep and rooting it out is a difficult, thankless chore.
