Claw Machine is a Switchback opener created by HDChung, and also contributed by Winterfrost and cat. This opener is notable that it can be continued to T-Spin Triple tower relatively reliably.
First Bag
Second Bag
Note that you only need to fill the first row of the left side for a T-Spin Double.
It is also possible to stack like these, but no continuation has been researched yet so you should freestyle if you need to stack like this.
Third bag
One is always possible to stack like this if 180° spin is enabled.
Alternatively, those two continuations are also considerable but the second one would not have 7-2 stacking continuation while it can be always stacked.
Fourth Bag and Onwards
Triple T-Spin Tower
The left side can be filled in freestyle. These are some examples.
7-2 Stacking
early T bag can continue this opener into 7-2 stacking. The following example shows conversion into LST stacking.
5-bag Perfect Clear
With 180° spin, it is possible to stack like this most of the time.
In SRS+ (Tetr.io), note that this 180° L spin is possible.
This will lead to a 100% Perfect Clear field with 9 minimal solutions, all of which are shown below.
These are the solutions which might lead to potential T-Spin/Tetris.
Lasso Triple T-Spin
While having some dependencies, this continuation will lead to a flat residue.
After building an overhang and performing a T-Spin Triple, use S or Z for another overhang for the lower T-Spin Triple.
S overhang, Z overhang, and T overhang are possible, but they are not recommended.
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I overhang
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O overhang
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J overhang
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L overhang
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Z overhang
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S overhang
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T overhang
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Trinity
This can always be built.
