play into someone's hands
US /pleɪ ˈɪntu ˈsʌmwʌnz hændz/
UK /pleɪ ˈɪntu ˈsʌmwʌnz hændz/
1.
играть кому-либо на руку
to do exactly what your opponent wants you to do, so that they gain an advantage over you
:
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By arguing with him, you're just playing into his hands.
Споря с ним, ты просто играешь ему на руку.
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The opposition's mistakes played right into the government's hands.
Ошибки оппозиции сыграли прямо на руку правительству.