Board Thread:General Discussion/@comment-26009886-20150115174750/@comment-25889587-20150218163442

Whoa! You got a nice treasure out there! So you got one blackberry brooches and two soda pop, which is probably enough to generate high scores.

Oh and you only get 7 A-grade treasure so it's a 75%. Minus the three S-rank guaranteed treasure means that supreme treasure chests will grant you at about: 9/16 = 56.25% of generating S-rank treasure in RNG event.