Rating - Versiju hronoloģija

Googol: /* Okay, but I want to know the formula ! */ Verb tense and wording changes

2014-05-20T10:12:24Z

Okay, but I want to know the formula !: Verb tense and wording changes

← Senāka versija		Versija, kas saglabāta 2014. gada 20. maijs, plkst. 12.12
36. rindiņa:		36. rindiņa:
	== Okay, but I want to know the formula ! ==		== Okay, but I want to know the formula ! ==

	The formula is exactly one's used by the ELO rating system, with the following adjustments:		The formula is exactly the one used by the ELO rating system, with the following adjustments:

	* First of all, if someone ~~left~~ a game for any reason this game is not taken into account by the ELO rating system.		* First of all, if someone leaves a game for any reason this game is not taken into account by the ELO rating system.
	* K=60 for the first 30 games, K=40 afterwards.		* K=60 for the first 30 games, K=40 afterwards.
	* 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".		* K is multiplied by (N/2) for N-player games. If N exceeds the "advised number of players" for this game, K is multiplied by (A/2), where A is the "advised number of players".
	* If 2 players ~~has~~ a rating difference greater than 600, we consider that their ELO difference is 600.		* If 2 players have a rating difference greater than 600, we consider that their ELO difference is 600.

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

Googol: /* How is my ELO ranking computed ? */ Rephrased for clarity, and minor grammatical edits

2014-05-20T10:08:46Z

How is my ELO ranking computed ?: Rephrased for clarity, and minor grammatical edits

← Senāka versija		Versija, kas saglabāta 2014. gada 20. maijs, plkst. 12.08
27. rindiņa:		27. rindiņa:
	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.		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.

	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's main principle is the following: the ELO points difference between 2 players determines the probability of each of them winning an encounter. If two players have the same ELO, they have an equal (50/50) probability of winning. If one player has 400 more points than the other, his probability of winning is 90%. ELO points gains and losses will, over time, tend to adjust the ELO rating of each player to reflect the actual probability that either of them will win a particular encounter.

	ELO system on BGA ~~has some specificity~~:		Some changes have been made to the ELO system used on BGA:
	* During your first 30 games, your ELO rating is more "elastic": you can win (or lose) more points at each game. This way, your ELO rating ~~converge~~ faster to you "natural" rating.		* During your first 30 games, your ELO rating is more "elastic": you can win (or lose) more points in each game. This way, your ELO rating converges 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 lose a 2-player game against each opponent ~~before~~ you (in game rank).		* The original ELO rating system was 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 below you (in game rank) and that you lose a 2-player game against each opponent ahead of you (in game rank).
	* Games with more than 2 players last longer. For this reason, there's more points to win (or lose) in such games... as long as the number of players does not exceed the "advised number of players" for that game.		* Games with more than 2 players last longer. For this reason, there are more points to win (or lose) 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 ! ==

Googol: /* Some advice */ General tidying up of phraseology.

2014-05-20T09:52:57Z

Some advice: General tidying up of phraseology.

← Senāka versija		Versija, kas saglabāta 2014. gada 20. maijs, plkst. 11.52
18. rindiņa:		18. rindiņa:
	== Some advice ==		== 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.		* 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 better 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.		* Game rank is very important when calculating the ELO. This is the reason it is important to continue fighting for minor places in the game even 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 lose 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 lose as many points as if you had finished the game in last place, plus an additional penalty of 10 points. Even if you are in a difficult situation it is in your interest 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 ? ==

Googol: /* How many points do I gain / lose for each game ? */ changed at...place to in...position and less to fewer

2014-05-20T09:47:43Z

How many points do I gain / lose for each game ?: changed at...place to in...position and less to fewer

← Senāka versija		Versija, kas saglabāta 2014. gada 20. maijs, plkst. 11.47
11. rindiņa:		11. rindiņa:

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

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

2014-01-15T08:22:08Z

Okay, but I want to know the formula !

← Senāka versija		Versija, kas saglabāta 2014. gada 15. janvāris, plkst. 10.22
38. rindiņa:		38. rindiņa:
	The formula is exactly one's used by the ELO rating system, with the following adjustments:		The formula is exactly one's used by the ELO rating system, with the following adjustments:

	* ~~At first~~, ~~when~~ someone left a game for any reason this game is not taken into account by the ELO rating system.		* First of all, if someone left a game for any reason this game is not taken into account by the ELO rating system.
	* K=60 for the first 30 games, K=40 afterwards.		* K=60 for the first 30 games, K=40 afterwards.
	* 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".		* 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".

Anthonyw: /* Some advice */

2012-09-14T13:39:14Z

Some advice

← Senāka versija		Versija, kas saglabāta 2012. gada 14. septembris, plkst. 15.39
21. rindiņa:		21. rindiņa:
	* 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 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 lose 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 ? ==

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

2012-09-14T13:38:46Z

How is my ELO ranking computed ?

← Senāka versija		Versija, kas saglabāta 2012. gada 14. septembris, plkst. 15.38
30. rindiņa:		30. rindiņa:

	ELO system on BGA has some specificity:		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.		* During your first 30 games, your ELO rating is more "elastic": you can win (or lose) 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).		* 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 lose 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.		* Games with more than 2 players last longer. For this reason, there's more points to win (or lose) 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 ! ==

Anthonyw: /* How many points do I gain / lose for each game ? */

2012-09-14T13:37:14Z

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

← Senāka versija		Versija, kas saglabāta 2012. gada 14. septembris, plkst. 15.37
13. rindiņa:		13. rindiņa:
	* 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 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 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.		* If you end the game at a worse place than a player with a lower ELO, you lose a lot points.
	* And so on...		* And so on...

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

2012-05-26T14:18:41Z

Okay, but I want to know the formula !

← Senāka versija		Versija, kas saglabāta 2012. gada 26. maijs, plkst. 16.18
36. rindiņa:		36. rindiņa:
	== 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 ?

← Senāka versija		Versija, kas saglabāta 2012. gada 26. maijs, plkst. 16.15
28. rindiņa:		28. rindiņa:

	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 ! ==