How do I rule on access, swing, further attempts and turning?

Question

Accepted Answer

These apply on top of the general let/stroke tests (World Squash Singles Rules 8.8 to 8.13).

Access

Striker didn't make every effort to play the ball: no let. Avoidable contact counts against "every effort", and you must apply Rule 14 if it happens.
Striker had access but took a path that caused the interference: no let, unless they were wrong-footed and could have recovered to make a good return, in which case let (or stroke if it would have been a winner).

Racket swing (reasonable backswing, strike and follow-through)

Swing was or could have been affected by an opponent making every effort to clear: let, or stroke if it would have been a winner.
Swing was prevented by the opponent's position: stroke, even if they were making every effort.
Interference caused by the striker's own excessive swing: no let. Swing exaggerated to earn a stroke: let.

Further attempt (and the striker could have made a good return)

Turning (the player loses sight of the ball or opponent, or the ball passes behind them)

Swing prevented while turning, even with the opponent making every effort: stroke.
Non-striker had no time to avoid: let.
Striker could have played without turning but turned to create a let: no let.
Always consider whether the turn was dangerous.

You can also allow a let or award a stroke without any request, stopping play if necessary, especially for safety.