This wiki is duplicated to 2 more sites.

This wiki is called Hard Drop.

https://tetris.wiki(called Tetris Concept)

http://tetris.wikia.com/wiki/Tetris_Wiki(called Tetris Wikia)

Pages created in any of 3 pages don't copy to others.

Tetris Concept is the original. Google seems to favor Tetris Wikia.