Terminologies

Tetris, especially modern, has a lot of Terms, so here's is a small page on what everything means in context:

L J O I T S Z, The name of the pieces

7 Bag: All 7 pieces will appear in a random order BUT every piece will appear before the next bag gets used Ex.: ljtoizs, szloitj, jsloitz, every piece once, in a random order

Line, Row: Line is horizontal, Row is vertical

Well: The unfilled section of your stack that you clear lines in

Harddrop HD, Softdrop SD: SD is when you Accelerate the falling of a piece but don't place it down instantly, HD: Instant placement

CW CCW: Clockwise, Counterclockwise rotation

Single/Double/Triple/Quad/Tetris A clear of 1/2/3 or 4 Lines

Kick: A kick is a rotation of a piece and how it interacts with the Rotation system

SRS: Super rotation System: the most common Rotation system that most games use (other include SRS+, ARS, BiRS,...)

Spin: A spin is when you position a piece but in order to get it in you cant just drop it (such as T-spin)

TSS/TSD/TST T spin Single, Double or Triple

Stack: How the player has built their board

CT4: Count to 4, as in Count to 4 lines for a Tetris

6-3, 7-2, 9-0 etc.: This Term is for the width of stacks on the board e.g.: 6-3 means you have 6 rows of blocks, 1 free one and then 3 filled rows

1/2/3/4w: 1/2/3/4wide, Wide means the length of the well, so 4w means a 4 wide well to clear lines in

Opener: A Strategy where, because of the 7 Bag system, you can build a set-up at the start of the game with ease and speed, such as TKI or PCO