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ASA and no one on base. Batter hits a ball to the fence. As the batter-runner rounds 1st they are obstructed. Runner now continues on rounding 2nd and 3rd and heads for home. Close play at home and runner is tagged just before reaching the plate.

Is obstruction still in play? If the runner hadn't been obstructed this would have been and inside the parker. Is obstruction off because the play wasn't at 2nd base?

I've tried to understand the rule as written and it isn't clear in my old and worn out brain.

Thanks