Spread potatoes over the bottom of a large slow cooker and top with the chicken.
In a medium bowl, mix together tomatoes, jalapeño, garlic, Worcestershire, thyme, cloves, cinnamon and a scant 2 teaspoons of salt. Pour evenly over the chicken. Cover tightly and slow-cook on high for 6 hours.
Transfer chicken and potatoes to individual dinner plates, leaving as much sauce behind as possible.
Mix the olives and parsley into the sauce and season with additional salt, if necessary. Spoon sauce over the chicken and serve.