pass rate > 100%

Check out this problem in Tactics Trainer: http://www.chess.com/tactics/?id=38522

"Pass Rate: 223.2%"

And you still got it wrong...

Nope, I got it right but I was docked for being too slow...SCORE: 30.5% My Score: 1448 (-3)

There are a lot of problems like this, often seen on the higher rated puzzles. Especially those with avg. time like 3 seconds or something. The rating accumulates because even though the problem is really easy, people "lose on time" really fast.

As you can see, a lot of the problems have high pass rate and low time, and also high amount of attempts, so this probably means that someone mealed off rating points off of a particular problem, and somehow a glitch makes the pass rate really high. Some of the pass rates >100% are with avg. time 40 seconds, but this is kind of strange as I cannot explain this. One problem even has zero seconds avg. time.

Another chess.com bug.

Add it to the overflowing list.

Chuck Norris does TT problems.

Those bugs are funny. I know a bug on lichess - after I solved the puzzle correctly, its rating went up +2147393618 and still was "only" -2147483648.

See also http://www.chess.com/forum/view/help-support/puzzles-with-impossibly-high-pass-rates.