Sure FD

Sure FD is a [[1]] opener

Sure FD (Japanese name... シュアFD) is one of the openers starting with T-Spin Fin Single. the first bag can always be loaded and the terrain to be left is clean. This opener was invented by Sioyaki.

1st bag

turning to the left

turning to the left

harddrop

TSS is always possible. This stacking is possible if the L-piece is faster than the J-piece. If the J piece is faster than the L piece, flip it left or right.

2nd bag

Always TSD is possible. softdrops other than T-pieces are fixed once, but that's all through this bag.

derivation

8-lines PC

34.0%

27.1%

15.6%

14.3%

9.5%

PC rate is 67.30%, TSSPC rate is ab.cd%, TSDPC rate is ab.cd%, x filter solutions.

14-lines PC

In fact, this opener alone can theoretically create an infinite PC loop.