I recently happened upon a comment (not on HN) that seemed to treat 'zugzwang' as a synonym for 'deadlock'. Possibly because 'zugzwang' sounds really cool and makes your inner voice sound intelligent to your inner ear.
The difference to a deadlock is that a deadlock is a inability to move, the zugzwang is an obligation to move.
The difference to a deadlock is that a deadlock is a inability to move, the zugzwang is an obligation to move.