[greymule]

I do a lot of softball, and I never liked that "BR can't retreat" rule. (In ASA, runners return TOI, by the way.) But there's also a rule that a BR who takes off her helmet is out, but forced runners remain forced.

Aside from the obvious things, softball treats many, many plays differently. Obstruction, nullifying runs, what can and can't be appealed, awarding of bases, runners hit by batted ball, what constitutes a force on appeal, no last time by, BOO; it goes on and on.

There are also some softball plays—right in the casebook—in which the offense benefits because of deliberate interference by a BR or runner.