Rating - Історія редагувань

Sourisdudesert: /* Okay, but I want to know the formula ! */

2012-05-26T14:18:41Z

Okay, but I want to know the formula !

← Попередня версія		Версія за 16:18, 26 травня 2012
Рядок 36:		Рядок 36:
	== Okay, but I want to know the formula ! ==		== Okay, but I want to know the formula ! ==

	~~At first, when someone left a game for any reason this game~~ is ~~not taken into account~~ by the ELO rating system.		The formula is exactly one's used by the ELO rating system, with the following adjustments:

	* ~~Table Level (TL)~~ is the ~~average of~~ ELO ~~ratings of all players at this table~~.		* At first, when someone left a game for any reason this game is not taken into account by the ELO rating system.
	* ~~The success (S) of a player depends directly on its ranking at~~ the ~~game~~, ~~from S~~=~~+470~~ (~~winner of the game~~) ~~to S=~~-~~470 (last player)~~.		* K=60 for the first 30 games, K=40 afterwards.
	* The performance (P) of ~~a player is TL+S~~.		* K is multiply by (N/2) for N-players games. If N exceed the "advised number of players" for this game, K is multiply by (A/2), where A is the "advised number of players".
	* ~~The new~~ ELO ~~rating (Rn)~~ is ~~a weighted average of the previous ELO rating (Rp) and the performance: Rn = K.P + (1-K)~~.Rp		* If 2 players has a rating difference greater than 600, we consider that their ELO difference is 600.

	== Good players, Experts, Masters ==		== Good players, Experts, Masters ==

Sourisdudesert: /* How is my ELO ranking computed ? */

2012-05-26T14:15:09Z

How is my ELO ranking computed ?

← Попередня версія		Версія за 16:15, 26 травня 2012
Рядок 28:		Рядок 28:

	The ELO system main principle is the followin: the ELO points difference between 2 players determines the probability of each of them to win the encounter. If two players has the same ELO, their probability to win are 50/50. If one player has 400 more points than the other, his probability to win is 90%. ELO points gains and losses after each game tend to adjust ELO ratings of each player in order this principle is applied.		The ELO system main principle is the followin: the ELO points difference between 2 players determines the probability of each of them to win the encounter. If two players has the same ELO, their probability to win are 50/50. If one player has 400 more points than the other, his probability to win is 90%. ELO points gains and losses after each game tend to adjust ELO ratings of each player in order this principle is applied.

			ELO system on BGA has some specificity:
			* During your first 30 games, your ELO rating is more "elastic": you can win (or loose) more points at each game. This way, your ELO rating converge faster to you "natural" rating.
			* Original ELO rating system has been designed for 2 player games. For games with more than 2 players, BGA considers (for the ELO rating) that you win a 2-player game against each opponent after you (in game rank) and that you loose a 2-player game against each opponent before you (in game rank).
			* Games with more than 2 players last longer. For this reason, there's more points to win (or loose) in such games... as long as the number of players does not exceed the "advised number of players" for that game.

	== Okay, but I want to know the formula ! ==		== Okay, but I want to know the formula ! ==

Sourisdudesert: /* Some advice */

2012-05-26T14:04:53Z

Some advice

← Попередня версія		Версія за 16:04, 26 травня 2012
Рядок 19:		Рядок 19:

	* There's no use beating players a lot weaker than you (not many points to win). Try to find opponents of your level: it's both more fun and more good for your ELO.		* There's no use beating players a lot weaker than you (not many points to win). Try to find opponents of your level: it's both more fun and more good for your ELO.
			* The game rank is very important to calculate the ELO. This is the reason it is important to continue fighting for the second place during the game if you think you can't win.
	* The number of ELO points you can gain/lose during a game increases with the number of players. The maximum is reached when there is the "recommended number of players". Try to play games with this recommended number of players.		* The number of ELO points you can gain/lose during a game increases with the number of players. The maximum is reached when there is the "recommended number of players". Try to play games with this recommended number of players.
	* When you are the first player to quit a game in progress, you loose as many points as if you would finish the game at the last place, plus an additional penalty of 10 points. Even if you are in a difficult situation, your interest is to play the game until the end - or concede the victory to your opponent.		* When you are the first player to quit a game in progress, you loose as many points as if you would finish the game at the last place, plus an additional penalty of 10 points. Even if you are in a difficult situation, your interest is to play the game until the end - or concede the victory to your opponent.

Sourisdudesert: /* How is my ELO ranking computed ? */

2012-05-26T14:04:17Z

How is my ELO ranking computed ?

← Попередня версія		Версія за 16:04, 26 травня 2012
Рядок 24:		Рядок 24:
	== How is my ELO ranking computed ? ==		== How is my ELO ranking computed ? ==

	The BGA ELO system is ~~inspired by~~ the standard [http://en.wikipedia.org/wiki/Elo_rating_system ELO rating system], in use for chess.		The BGA ELO system is directly based on the standard [http://en.wikipedia.org/wiki/Elo_rating_system ELO rating system], in use for chess.

	~~Let's try to make it simple~~: the points ~~you win/lose after~~ each ~~game depends on the ranking~~ of ~~your opponents. If you~~ win ~~at a table with opponents stronger than you, your ranking will increase a lot~~. If ~~you lose at~~ the same ~~table~~, ~~your ranking will decrease a little~~. ~~And so on ...~~		The ELO system main principle is the followin: the ELO points difference between 2 players determines the probability of each of them to win the encounter. If two players has the same ELO, their probability to win are 50/50. If one player has 400 more points than the other, his probability to win is 90%. ELO points gains and losses after each game tend to adjust ELO ratings of each player in order this principle is applied.

	~~In case there are~~ more than ~~2 players at~~ the ~~table~~, ~~we take into account the final rank~~. ~~This is the reason it~~ is ~~important to continue fighting for the second place during the game if you think you can't win~~.

	== Okay, but I want to know the formula ! ==		== Okay, but I want to know the formula ! ==

Sourisdudesert в 14:00, 26 травня 2012

2012-05-26T14:00:10Z

← Попередня версія		Версія за 16:00, 26 травня 2012
Рядок 16:		Рядок 16:
	* And so on...		* And so on...

			== Some advice ==

			* There's no use beating players a lot weaker than you (not many points to win). Try to find opponents of your level: it's both more fun and more good for your ELO.
			* The number of ELO points you can gain/lose during a game increases with the number of players. The maximum is reached when there is the "recommended number of players". Try to play games with this recommended number of players.
			* When you are the first player to quit a game in progress, you loose as many points as if you would finish the game at the last place, plus an additional penalty of 10 points. Even if you are in a difficult situation, your interest is to play the game until the end - or concede the victory to your opponent.

	== How is my ELO ranking computed ? ==		== How is my ELO ranking computed ? ==

Sourisdudesert в 13:50, 26 травня 2012

2012-05-26T13:50:59Z

← Попередня версія		Версія за 15:50, 26 травня 2012
Рядок 7:		Рядок 7:

	If you never play a game on BGA, your initial rating is 1500 . Each time you win a game your rating increases, and it decreases each time you lose a game.		If you never play a game on BGA, your initial rating is 1500 . Each time you win a game your rating increases, and it decreases each time you lose a game.

			== How many points do I gain / lose for each game ? ==

			ELO points gains / losses depend on the level of your opponents, and your rank at the end of the game. Some examples:
			* If you end the game at a better place than a player with a higher ELO, you gain a lot of points.
			* If you end the game at a better place than a player with a lower ELO, you gain less points.
			* If you end the game at a worse place than a player with a lower ELO, you loose a lot points.
			* And so on...



	== How is my ELO ranking computed ? ==		== How is my ELO ranking computed ? ==

Amagila в 05:32, 20 лютого 2012

2012-02-20T05:32:55Z

← Попередня версія		Версія за 07:32, 20 лютого 2012
Рядок 6:		Рядок 6:
	Example: 1648 http://fr.boardgamearena.com/theme/img/common/rank.png.		Example: 1648 http://fr.boardgamearena.com/theme/img/common/rank.png.

	If you never play a game on BGA, your initial rating is 1500 . Each time you win a game your rating increases, and it decreases each time you ~~loose~~ a game.		If you never play a game on BGA, your initial rating is 1500 . Each time you win a game your rating increases, and it decreases each time you lose a game.

	== How is my ELO ranking computed ? ==		== How is my ELO ranking computed ? ==
Рядок 12:		Рядок 12:
	The BGA ELO system is inspired by the standard [http://en.wikipedia.org/wiki/Elo_rating_system ELO rating system], in use for chess.		The BGA ELO system is inspired by the standard [http://en.wikipedia.org/wiki/Elo_rating_system ELO rating system], in use for chess.

	Let's try to make it simple: the points you win/~~loose~~ after each game depends on the ranking of your opponents. If you win at a table with opponents stronger than you, your ranking will increase a lot. If you ~~loose~~ at the same table, your ranking will decrease a little. And so on ...		Let's try to make it simple: the points you win/lose after each game depends on the ranking of your opponents. If you win at a table with opponents stronger than you, your ranking will increase a lot. If you lose at the same table, your ranking will decrease a little. And so on ...

	In case there are more than 2 players at the table, we take into account the final rank. This is the reason it is important to continue fighting for the second place during the game if you think you can't win.		In case there are more than 2 players at the table, we take into account the final rank. This is the reason it is important to continue fighting for the second place during the game if you think you can't win.

Sourisdudesert в 08:54, 23 січня 2012

2012-01-23T08:54:06Z

← Попередня версія		Версія за 10:54, 23 січня 2012
Рядок 1:		Рядок 1:
			[[Category:Help]]
	== What is ELO rating ? ==		== What is ELO rating ? ==

	Your ELO rating for a game is your level at this game. It's a 4 digits number followed by sign .		Your ELO rating for a game is your level at this game. It's a 4 digits number followed by sign http://fr.boardgamearena.com/theme/img/common/rank.png.

	Example: 1648 http://fr.boardgamearena.com/theme/img/common/rank.png.		Example: 1648 http://fr.boardgamearena.com/theme/img/common/rank.png.

Sourisdudesert: Created page with " == What is ELO rating ? == Your ELO rating for a game is your level at this game. It's a 4 digits number followed by sign . Example: 1648 http://fr.boardgamearena.com/theme..."

2012-01-23T08:53:27Z

Created page with " == What is ELO rating ? == Your ELO rating for a game is your level at this game. It's a 4 digits number followed by sign . Example: 1648 http://fr.boardgamearena.com/theme..."

Нова сторінка

== What is ELO rating ? ==

Your ELO rating for a game is your level at this game. It's a 4 digits number followed by sign .

Example: 1648 http://fr.boardgamearena.com/theme/img/common/rank.png.

If you never play a game on BGA, your initial rating is 1500 . Each time you win a game your rating increases, and it decreases each time you loose a game.

== How is my ELO ranking computed ? ==

The BGA ELO system is inspired by the standard [http://en.wikipedia.org/wiki/Elo_rating_system ELO rating system], in use for chess.

Let's try to make it simple: the points you win/loose after each game depends on the ranking of your opponents. If you win at a table with opponents stronger than you, your ranking will increase a lot. If you loose at the same table, your ranking will decrease a little. And so on ...

In case there are more than 2 players at the table, we take into account the final rank. This is the reason it is important to continue fighting for the second place during the game if you think you can't win.

== Okay, but I want to know the formula ! ==

At first, when someone left a game for any reason this game is not taken into account by the ELO rating system.

* Table Level (TL) is the average of ELO ratings of all players at this table.
* The success (S) of a player depends directly on its ranking at the game, from S=+470 (winner of the game) to S=-470 (last player).
* The performance (P) of a player is TL+S.
* The new ELO rating (Rn) is a weighted average of the previous ELO rating (Rp) and the performance: Rn = K.P + (1-K).Rp

== Good players, Experts, Masters ==

* Good players: > 1600 ELO
* Experts: > 1800 ELO
* Masters: > 2000 ELO