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Some things about basic stats

dan63047 2023-09-21 19:50:39 +00:00
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Meaning-and-the-essence-of-stats.md

@ -14,11 +14,19 @@ Whole GLICKO-2 rating system is a method of assessing a player's strength in com
GLICKO-2 system also has a system constant, responsible for "change in volatility over time". So, yeah, each player has hidden variable, called "volatility", which is high if you successfully compete against higher rated players (or vise versa), and low if you play "on your rating". The value of constant, hoverer, unknown. GLICKO-2 system also has a system constant, responsible for "change in volatility over time". So, yeah, each player has hidden variable, called "volatility", which is high if you successfully compete against higher rated players (or vise versa), and low if you play "on your rating". The value of constant, hoverer, unknown.
#### [RD] Rating deviation #### [RD] Rating deviation
Ok it's not a Reliability Deviation. That number tells, how the rating system uncertain about player rating. It goes down every played match on some amount, that calculated very weirdly and goes up by 1 each day after week of inactivity (if RD less, than 350). RD also has a soft floor of 60 RD, but it's possible to get lower RD by playing big amount of games. If your RD higher, than 100, your rank gets hidden.
#### [WR] Win Rate #### [WR] Win Rate
Very very old and inaccurate way to determine players skill. It's just a ratio of wins to played games.
#### [APM] Attack per Minute #### [APM] Attack per Minute
That one is easy to understand. It's just a ratio of attack (sent + cancelled lines) to time (minutes). The only problem is — it's still may be not accurate, since you can send 20 attack in 5 seconds with opener and then have no skill to play midgame, having in total, let's say, 120 APM, or just play good midgame without opener and be really strong opponent with same 120 APM.
#### [PPS] Pieces per Second #### [PPS] Pieces per Second
That's also easy. It's a measurement of speed. It's just a ratio of placed pieces to time (seconds). The faster you place pieces, the bigger it is.
#### [VS] Versus Score #### [VS] Versus Score
That metric was invented by osk and promoted in game, as "general indicator of skill". It calculated with this formula:
`VS = [ ( attack + garbage lines cleared ) / pieces ] * PPS * 100`, where constant of 100 here is just for scale.
That metric encourages player for using garbage lines.
### Calculated by using fancy math ### Calculated by using fancy math
#### [APP] Attack per Piece #### [APP] Attack per Piece
#### [VS/APM] Versus Score per Attack per Minute #### [VS/APM] Versus Score per Attack per Minute