Here is the ruling from NFHS. They did change it slightly from what was originally sent to them as they added a runner on 2nd base, but that does not change the ultimate outcome of the ruling.
SITUATION 1: R1 is on second base. A ground ball is hit to F6, who makes an errant throw to F3, who cannot make the catch. The ball goes to the fence where F9 is in position to back up the play and quickly retrieves the ball. B2 sees that the ball is overthrown and attempts to turn the corner to head to
second base, and is obstructed by F3 who is attempting to retrieve the ball. The umpire signals and verbalizes obstruction. B2 realizes she cannot reach second base and returns safely to first base. R1 advances to third base. The ball is thrown back to F1, who is not in the circle. The base coach now tells B2 to break for second base due to the obstruction call. B2 runs toward second base, and the pitcher runs over and tags her half way between the bases. R1 remains on third base. RULING: The umpire returns B2 to first base as there was no subsequent play on a different runner. (2-36, 8-4-3b EXCEPTION 1) COMMENT: The umpire judged that B1 was obstructed between first base and second base. B1 has not satisfied an exception in Rule 8-4-3 and, therefore, cannot be put out between the two bases where she was obstructed.
SITUATION 1: R1 is on second base. A ground ball is hit to F6, who makes an errant throw to F3, who cannot make the catch. The ball goes to the fence where F9 is in position to back up the play and quickly retrieves the ball. B2 sees that the ball is overthrown and attempts to turn the corner to head to
second base, and is obstructed by F3 who is attempting to retrieve the ball. The umpire signals and verbalizes obstruction. B2 realizes she cannot reach second base and returns safely to first base. R1 advances to third base. The ball is thrown back to F1, who is not in the circle. The base coach now tells B2 to break for second base due to the obstruction call. B2 runs toward second base, and the pitcher runs over and tags her half way between the bases. R1 remains on third base. RULING: The umpire returns B2 to first base as there was no subsequent play on a different runner. (2-36, 8-4-3b EXCEPTION 1) COMMENT: The umpire judged that B1 was obstructed between first base and second base. B1 has not satisfied an exception in Rule 8-4-3 and, therefore, cannot be put out between the two bases where she was obstructed.