Player rating for tournaments across all installments of Heroes.

It reflects the results in descending order... The most significant result is from the latest tournament - 1.0. The result from the second-to-last tournament is less significant because only 0.9 remains, the third-to-last tournament is even less significant (0.81), then 0.729; 0.6561... and so on, in descending order.
I wonder, who should be explaining this to whom?..