I watched the last few games of Chelsea and it's clearly not good, Bolton have been able to stay consistent in their last few games, I think it's going to be a close one tonight.
As you said I could see a 1-0 victory for Chelsea or a 2-1 victory, but with the atrocious defense of Chelsea lately I think Bolton will score at least a goal here.
So I'm betting that Chelsea won't get out of their slump tonight against a good Bolton team and I'm going with Bolton +1,5,+2 (-108 on pinnacle right now)