User:Wongsz

Guideline
Possible to Freestyle, shown stack has small chance to Perfect Clear

All-Spin
After stacking in one of these ways you will have an S or O on hold.

Imperial cross
These patterns use the second bag S/O to reliably create an Imperial Cross. Use these when all else fails (requires use of 180 rotations)
 * O save


 * S save

Note if O comes early 3rd bag in either variation one can stack like so:

Imperial Cross: STSD: Alternatively one can opt for a t-spin single in trinity to form either a t-spin or z-spin next. (See the Trinity hard drop page TSD Declined or Approved?)
 * Other ways to resolve patterns:


 * Listed are some congruent shapes that result in the same Triple Double Attack.

This is highly freestyle but will usually require I>J/L for the Fin overhang
 * If the opportunity presents itself one can Z-Spin Single into Fin TSD for style points

Zipper
Congruent shapes which use both S/Z delay the attack to the third bag. This can be resolved like so, or upgraded into another Triple Double Attack.

Perfect Clear

 * S Variation 66.15% Solutions
 * O Variation 45.60% Solutions