关键棋子 meaning in English

critical piece

As one of new marketing development means in banking service and the most efficient and quick ways in attracting profitable corporate customers , internet banking service is gradually becoming the key weapon in competing with the foreign banks after the limitations of the banking operation have been abolished
网上银行服务，作为一种新型的银行业务营销拓展手段和争夺优质企业客户最快、最有效的途径，目前正成为外资银行与中资银行在逐步取消经营限制后竞争胜败的关键棋子。