It was a swing that emphasized pulling of the left side on the downswing, and using the big muscles of the back and legs, rather than the small muscles of the hands and arms, for clubface control. To clarify, Square-to-Square meant the club stayed square to the target line, not the path.
It produces a consistent draw: Swinging the arms and shoulders on the same plane naturally creates a flatter (more horizontal) swing , with the club arching around the body. This promotes a clubhead path that approaches the ball from inside the target line the essential ingredient to hitting right-to-left shots.
That makes the swing plane way too flat and forces the player to re-route the club dramatically to even hit the ball. The wrists shouldn’t roll sideways. They hinge by moving up and down. Try this: Hold the club out in front of you , and hinge it upward as if you were going to tap your nose.
All full swing clubfaces open during the backswing , and once the takeaway starts, there are two ways to open the clubface : (1) body rotation, (2) forearm rotation. When your clubface starts away from the ball, it’s in the process of opening (pointing to the right of target – left if you ‘re left handed).
So if the player’s clubface is closed at the top of the back swing it (the clubface ) will be pointing straight up at the sky. From there even if everything else looks pretty good in the swing, the clubface is going to come back closed at the ball which will start left (for right-handers) and hook during its flight.
Check your clubface at the top . If it’s vertical (or perpendicular) to the ground ( top inset), you’re cupping your left wrist and opening the face. When the face is square , the left wrist is flat, and the face is parallel to it (above). From there, it’s easier to swing to square at impact.
Ten Finger Grip