with one hand behind your back

with one hand tied behind (one's) back

Easily, nearly without having to try at all. I'm a professional musician, so that song is hardly a challenge—I could play it with one hand tied behind my back!
See also: back, behind, hand, one, tie

with one hand (tied) behind your back

1 with serious limitations or restrictions. 2 used to indicate that you could do something without any difficulty.
See also: back, behind, hand, one
References in periodicals archive ?
If you're an AE or AT, do you remember being told in "A" school that you should work with one hand behind your back while working on energized circuits?