jìn tuì liǎng nán
no room to advance or to retreat (idiom); without any way out of a dilemma
trapped
in an impossible situation
zuǒ yòu liǎng nán
dilemma
quandary
Scylla and Charybdis
between the devil and the deep blue sea (idiom)
jiè yú liǎng nán
to be on the horns of a dilemma (idiom)