I just found this aswell Tricky, hope it helps.
If you click on any brackets facing each other in the same line, such as (), {} or , you have a chance of either regaining all failed tries, or removing a dud password. You can also click brackets containing a few special characters, +> and {,} for example.
Just incase you didnt know (you prob do ) you can backout after 3 tries and it resets the password and you get all your tries again.
*Just found this aswell, I'm offshore so i cant try it out, let me know if it works
http://hack-boy.com/
Hope this helps