If any tetrimino locks in at 20+, is that a top out? 108.71.121.118 15:40, 16 August 2017 (PDT)

Fully or partially? Either way, it depends on game. Piotr Grochowski (talk) (contribs) 23:07, 16 August 2017 (PDT)

Any part of a piece at 20 or higher. 108.71.121.118 05:22, 17 August 2017 (PDT)

Including row 20 itself?

Yes. 108.71.121.118 05:31, 17 August 2017 (PDT)

So, top row is useless? What a weird system...

So does it count if a piece locks in at row 20? 108.71.120.88 05:48, 17 August 2017 (PDT)

There are many conditions for loss. See page.

Yes, but is a piece partially locking in at row 20 one of them? 108.71.120.88 05:59, 17 August 2017 (PDT)

I don't think any game used this, unless the playfield is less than 20 high.