I got everything planned

Meaning-and-the-essence-of-stats.md

@@ -1,6 +1,36 @@
 > [!WARNING]
 > Page under development.
 
-Players always wanted to improve their skill level. And some people was so obsessed with it, they tried to calculate their skill through number of actions (placed pieces, passed time, number of inputs, garbage lines) counted by game, with fancy math.
+Players always wanted to improve their skill level. And some people was so obsessed with it, they tried to calculate their skill, using numbers of actions counted by game (ex. placed pieces, passed time, number of inputs, garbage lines) and fancy math.
 
-> I will continue later
+In TETR.IO, there is a variety of stats. But what are they all mean? Let's figure that's out.
+
+## Multiplayer stats
+### Calculated by game
+#### [TR] Tetra Rating
+#### [GLICKO] GLICKO-2 rating
+#### [RD] Rating deviation
+It's actually a Reliability Deviation
+#### [WR] Win Rate
+#### [APM] Attack per Minute
+#### [PPS] Pieces per Second
+#### [VS] Versus Score
+### Calculated by using fancy math
+#### [APP] Attack per Piece
+#### [VS/APM] Versus Score per Attack per Minute
+#### [DS/S] Downstack per Second
+#### [DS/P] Downstack per Piece
+#### [APP + DS/P] Summary of Attack per Piece and Downstack per Piece
+#### [Cheese] Cheese Index
+#### [GbE] Garbage Efficiency
+#### [wAPP] Weighted Attack per Piece
+#### [Area] Area
+#### [Est. TR] Estimated Tetra Rating
+#### Playstyle calculations
+## Singleplayer stats
+### Score
+#### Score per piece
+### Finesse
+#### Finesse faults
+#### Finesse precentage
+#### [KP/P] Key presses per piece