Alternative skill ranking
Psychostats 3 is quite good ranking system but it might not tell everything about the goodness of some player. Here’s what I tried to look for from PS3 database:
Consider a player who has K : D ratio 1.0. That kind of player on average kills only one player per round. If that player has very good skill in PS3 it means that the victims of this player are ranked high on PS3. That is the ELO rating system PS3 is based on.
Now think about player who manages to kill 3 noobs in each round before dying himself. Such player might be as valuable for the team as the player who always kills just the toughest opposite team player.
Player whose K : D ratio is close to 1 with high skill could be actually more valuable for the team than the 1st ranked player on PS3. Here’s what was calculated:
Player skill / (K : D)^1/3 ::: That is “player’s skill divided by cube root of K : D ratio”
Division by cube root is done so that players with high K : D ratio would not suffer so much about the comparison to just K : D. For example player with K : D ratio of 2.5 would have his skill divided by 2.5^1/3 = 1.357. Player with only 2.0 ratio would have division value of 2.0^1/3 = 1.26. Difference between 1.357 and 1.26 is only 0.0973. If we used plain K : D ratio then the player with 2.5 ratio would have his skill divided by comparable larger value than the others. By taking cube root from the ratio the values pack closer to 1.0 and thus are closer to the real skill of the player and even players with high K : D ratio get sane value for alternative rank.
Name Rank K : D Skill Skill / (K : D)^1/3koti 18 1.33 13992 12724 M@rt!n 25 1.35 13718 12412 Maksiu 13 1.59 14283 12237 TupaC 4 1.96 15293 12220 dred 11 1.67 14400 12137 EchO* 24 1.46 13752 12122 MITAC 16 1.57 14058 12095 k1ller 8 1.73 14510 12087 ANAL .pl 10 1.73 14416 12009 Perplexer 15 1.65 14140 11966 Michaellsland 12 1.72 14327 11958 lWoDl windman 29 1.46 13520 11918 ?oakak 20 1.62 13959 11885 emmanuel 2 2.24 15539 11876 Chinaman 21 1.63 13913 11822 [odabasz]Pazo 14 1.80 14279 11738 essim0n 1 2.47 15862 11734 AJEJ 28 1.57 13614 11714 FakFeijs 6 1.93 14559 11693 Dr.House 23 1.69 13839 11618 k!llErM@ch!nE 22 1.72 13901 11602 BaLaN 3 2.31 15302 11576 Sonic 17 1.78 14019 11567 hg.toble 19 1.78 13990 11544 voov 9 2.00 14469 11484 The[Rip]Ice_Fin 27 1.71 13631 11399 hg.antizero 5 2.30 15011 11372 S.G#antizero 7 2.28 14552 11056
On that list you should see players who do not necessarily get lots of kills but know how to kill the other skilled players. Notice that the values in the last column don’t actually mean anything else but the order of the list. What was expected that the players who have rushing style of playing drop somewhat lower on this ranking list. They manage to kill the first couple noobs who come across their way at the beginning of each round and thus get high K : D ratio. Players who are more careful in their play either kill these first rushers or wait for the other skilled players to come to their line of fire.
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Balan asked this:
K1ller i have read your blog and i found some interesting things , you said something about : “What was expected that the players who have rushing style of playing drop somewhat lower on this ranking list. They manage to kill the first couple noobs who come across their way at the beginning of each round and thus get high K : D ratio. Players who are more careful in their play either kill these first rushers or wait for the other skilled players to come to their line of fire.” Why not K:M is considered in calculating those values ?!
K:M is not considered because that is not of importance. Even if someone could get 2 kills per minute but just killing noobs his skill would not get as high as someone getting 1 kill per minute but killing only highly ranked players.
What I tried to find is that which players know how to kill the skilled players.
One common situation is that one of the skilled (top-10) players manages to attack team from behind. Noobs don’t realize it and just look forward. Intelligent player realizes that someone is attacking from behind and starts aiming at that direction and kills the skilled player.
Another situation is when some skilled player always chooses same spot where he gets lots of easy frags (lots of noobs running to same place round after round). Killing that skilled player before he starts killing these noobs can be very valuable to team.
The ranking list above is not very good measure though. It’s just somewhat bad approximation what the list could look like if the comparison was done in proper way. Proper way to do it is to check how many players each player has killed and what has been the skill of those players. Then take the ratio of killed skilled players / killed all players. PS3 shows in the player statistics page the stats about victims, which includes information about how many times some victim has been killed and what is his skill.
ELO rating system is based on those 1 vs. 1 matches (you kill somebody or somebody kills you). That does not capture the essence of teamplay, which might be very hard to do.
Comment :: March 30, 2007 @ 4:17 pm