[CecilOne]

Deliberately tricky wording about rare occurrences.

It is not obstruction if an errant throw pulls the first base player without the ball into the path of the batter-runner, and impedes her progress.
a. True
b. False
Explanation 2-36; 8-4-3
OK, if only attempting to catch.

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A pitcher is required to pitch until the first batter facing her has completed her turn at bat or the side has been retired.
a. True
b. False
Explanation 8-9-2


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Very Ambiguous

R1 is on first base; B2 is at bat with an 0-2 count and no outs. B2 swings at a third strike that is dropped by the catcher. B2 runs toward first base. As R1 is diving back to first base, B2 is hit in the back with F2's throw to first base and the ball goes out of play. What is the result of the play?
a. B2 is awarded second base; R1 is awarded third base.
b. B2 is declared out for interference; R1 remains at first base.
c. B2 is declared out for interference; R1 is awarded second base.
d. B2 has struck out; R1 remains at first base.
e. B2 has struck out and is charged with interference; R1 is declared out as the runner closest to home.
Explanation 8-6-16c Penalty
As discussed, it could be INT if judged so as hindering fielder’s catch, HTBT.
The throw was late enough that R1 had time to advance, react, then return to dive back.