soak tamarind pulp in 3 cups boiling water for 2 hours. mash then strain. Discard pulp and save juice. saute jalapeno, garlic, shallots and ginger in oil until soft. add cayenne and chicken. mix well. add coconut milk. bring to boil. reduce heat. cover, simmer 30 minutes stirring occasionally. add other chiles and cook for 5 more minutes. remove cover. add tamarind liquid. cook another 10 minutes until thickened. serve over rice.