OPENERS · LESSON 5 OF 6
MS2 and Gamushiro
AFTER THIS GUIDEYou can identify the shared attack goal and compare the foundations and exits without mixing the two opener routes.
Similar goals, different support work.
MS2 (Mountainous Stacking 2) and Gamushiro are opening families that lead through a Triple and a Double towards a possible Perfect Clear. They are not interchangeable scripts. Their first-bag support shapes decide which later placements are reachable.
MS2’s published research includes routes studied with 180° spins. That matters if your game profile does not allow the same turns. Learn a route that the trainer verifies for your selected profile rather than assuming every published construction transfers unchanged.
Gamushiro also has alternative later-bag arrangements. An early O in the second bag is a common reason to choose a different shape. Learning a preferred target is only the first step; recognise when the order asks for a variant.
Neither first-stage screenshot below is a chronological sequence. These are the trainer’s target references. Study the sequence shown during an actual attempt, then compare the resulting board with the reference. A complete set of PC solutions is a separate study task, not a hidden guarantee attached to the opener name.
Compare the bases before the attacks
Inspect MS2
Find its vertical I on the left and the supported pieces beside it. Ask which cells must already exist before the upper structure can be placed. Do not borrow the right-side foundation from Gamushiro.
Inspect Gamushiro
Find the differently placed I and the right-side L. Follow the first stage in the trainer and observe which early pieces supply that support.
Compare the residue
After each opener’s attack stages, inspect the remaining board and bag position. A PC attempt needs a reachable solution for those pieces; otherwise name a low, accessible continuation.
Triple → Double → Perfect Clear. Colored cells show the first-stage reference, not placement order. Later bags, clears and alternative routes are not shown.
Triple → Double → Perfect Clear. Colored cells show the first-stage reference, not placement order. Later bags, clears and alternative routes are not shown.
Play through one verified bag sequence
This is one supported reference route under the TETR.IO profile, not a prescription for every bag. Advance one locked piece at a time; each picture shows the board after any line clear. The practice mode may generate a different compatible sequence.
Start on an empty board. First bag: Z → I → J → T → S → O → L. Hold starts empty.
1. Place Z. No line clear.
2. Place I. No line clear.
3. Place J. No line clear.
4. Place T. No line clear.
5. Place S. No line clear.
6. Place O. No line clear.
7. Place L. No line clear.
8. Place J. No line clear.
9. Place O. No line clear.
10. Place L. No line clear.
11. Place I. No line clear.
12. Place S. No line clear.
13. Hold first, then place Z. No line clear.
14. Place T. 3 rows cleared; the picture shows the result.
15. Place L. No line clear.
16. Place Z. No line clear.
17. Place S. 1 row cleared; the picture shows the result.
18. Hold first, then place T. 2 rows cleared; the picture shows the result.
19. Place J. 1 row cleared; the picture shows the result.
20. Hold first, then place I. 1 row cleared; the picture shows the result.
Play through one verified bag sequence
This is one supported reference route under the TETR.IO profile, not a prescription for every bag. Advance one locked piece at a time; each picture shows the board after any line clear. The practice mode may generate a different compatible sequence.
Start on an empty board. First bag: O → Z → T → L → I → J → S. Hold starts empty.
1. Place O. No line clear.
2. Place Z. No line clear.
3. Place T. No line clear.
4. Place L. No line clear.
5. Place I. No line clear.
6. Place J. No line clear.
7. Place S. No line clear.
8. Place Z. No line clear.
9. Place L. No line clear.
10. Place I. No line clear.
11. Place J. No line clear.
12. Place S. No line clear.
13. Place O. No line clear.
14. Place T. 3 rows cleared; the picture shows the result.
15. Place Z. No line clear.
16. Place T. 2 rows cleared; the picture shows the result.
17. Place S. No line clear.
18. Place L. 1 row cleared; the picture shows the result.
19. Place J. 1 row cleared; the picture shows the result.
20. Place I. 1 row cleared; the picture shows the result.
Common mistakes
Mixing stages from two similar pictures
A small foundation difference can shift every later cavity. Keep one complete route together while learning.
Ignoring the rotation profile
A route that needs 180° cannot be reproduced by assuming a different profile has identical kicks. Check the demonstrated inputs.
Expecting the first-bag success rate to describe the final PC
Building the opener and completing a later Perfect Clear are different events with different constraints.
TAKE IT TO THE BOARD
Compare one attempt of each
- Choose MS2 in Openers with Gravity Off. Finish one demonstrated route and note its first support dependency.
- Choose Gamushiro and do the same. Keep the same game profile for the comparison.
- At each finish, say whether the board is empty or merely ready for a continuation. Identify one difference between the two bases.
What counts as progress? You can keep the routes separate and explain why an alternative bag order may require a different continuation.
Open practice ↗Opens the mode. Set Gravity and NEXT yourself; your current settings are kept.
Keep these terms nearby
NEXT IN THIS PATH
Transitioning out
Decide what to build after the memorised part ends.
Read the next guide →Further reading
For setup variations and additional examples, see h-docs: MS2. The practice task here is original to Stacking Lab. For setup variations and additional examples, see FOUR: Gamushiro. The practice task here is original to Stacking Lab.