- #1
luckis11
- 272
- 2
A player has (wins+0.5draws)/(wins+draws+losses)=(200+0.5*0)/(200+0+0) and another has (1200+0.5*0)/(1200+0+1000). This rating shows correctly that the first player is much stronger than the second. Whereas the Elo, Glicko and Truskill rates (roughly about) the first with 800+200*8-0*8=2400 and the second with 800+1200*8-1000*8=2400, if the points with which they started is 800. In essence what Elo etc count is wins-losses, whereas (w+0.5d)/(w+d+l)<=>(w-l)/(w+d+l). They fail to show that the first is much stronger than the second, they say that they are of the same strength! It is WRONG and it needs to be replaced. Correct me if I am wrong, e.g. that these are not the points Glicko gives to these 2 players (then how many points does it give), but am I wrong enough that the point I mentioned does not apply? These, if they had faced opponents from all ranges of ratings (selected randomly), and not opponents of almost of the same rating, and the latter is what happens. They should face opponents from all ranges of ratings and not opponents of almost the same rating, because the latter makes it (at least for me) impossible to judge the system.
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