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.

• O save

Use these when all else fails (requires use of 180 rotations)

• S save

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

• Other ways to resolve patterns:

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?)

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

• If the opportunity presents itself one can Z-Spin Single into Fin TSD for style points

This is highly freestyle but will usually require I>J/L for the Fin overhang

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