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не раскрывая свои карты stresses
gen.	close to the vest (driven)
не раскрывать своих карт
gen.	play it close to the chest
idiom.	keep your cards close to your vest (Natalia D)
Makarov.	play one's cards close to the chest
не раскрывать свои карты
gen.	conceal one's hand (Beloshapkina)
saying.	play cards close to one's chest (WiseSnake)

не раскрывая свои карты: 3 phrases in 2 subjects

Figure of speech	1
General	2