Under Construction

Crevasse Stacking is an opener inspired by HeboMAI Spin starting with a T-spin Mini Single. Afterwards the flat 'Crevasse' allows for various stacking methods while ideally maintaining a low board state.

First Bag

There are many sequences in which you can build this stack using a J-spin or S-spin. If T is in hold, considering the mirrored setup, a J is required before S or L before Z, if you cannot prop the S/Z on eachother.

General Stacking Methods

A T-spin Mini Single sends 0 lines on its own, meaning in versus gamemodes you will likely receive garbage making long continuations risky. It is possible to downstack while maintaining back-to-back but is situational.

• T-spin Double → 6-3: Either O or J is required before Z, 2nd diagrams avoid potential soft-drops.

• T-spin Double → Shachiku Train: Completing the 2nd T-spin Double of Shachiku Train is not always possible, instead stacking 6-3 or 5-4 is more reliable. The first diagram is loopable as shown here but is not recommended in normal play.

• Imperial Cross: Useful for bags with an early Z, but requires another T before downstacking is possible.

There are two ways to spin the J into place, if the I isn't placed use the second method which utilises a 180° Rotate or soft-drop onto the S instead.

An alternate Imperial Cross → Imperial Cross setup. See potential continuations here.

• T-spin Triple → Perfect Clear: 86.79% PC chance with 33 unique solutions here.

An alternate T-spin Triple setup similar to the Imperial Cross setup.

Centre Well

A less committal stack that can be followed up with many freestyle techniques. The I can be placed in various ways allowing for 6-3, 5-4 or other stacks.

• STMB Cave → 5-4: Resolving the centre well dependency with an I and J is desirable.

• T-spin Double → 5-4: J and O can work in either order, the former allows for Blink SZ Prop opportunities whereas the latter allows for floating T-spins. In cases of an early I the third stack is always possible.

• Mechanical TSD: A repeatable pattern that results in Floating T-spin Doubles. At any point one can donate the extra I breaking the pattern.

Making a Super T-spin Double is only reliable when using one or two extra layers of minos created by the Mechanical T-spin Double setup, but prevents downstacking.

• 5-Height Perfect Clear: This setup has a 99.25% PC chance with 124 unique solutions here. (URL too long- copy code starting v115 and load into another fumen)

Inferior Centre Well

A slightly inferior centre well stack due to the uneven height difference on either side of the well, resulting in less stable and diverse stacking options. In some cases you may need to 180° rotate the J.

• STMB Cave → 5-4: This is difficult to convert to 5-4 without filling the L or I/J dependency and wasting a T piece, unlike the original Centre Well.

An interesting Triple Double Attack conversion after the first STMB Cave. This is also possible but avoidable in the original Centre Well as shown here.

• 5-Height Perfect Clear: This setup has a 93.97% PC chance with I on hold. Without I on hold this becomes 90%, see the 48 unique solutions here.

See Also

HeboMAI Spin

Mini Triple Double