How to calculate ELO

[Krzysztof Grzelak]

Please write as someone knows how to calculate the ELO all programs taking off in the tournament.

[BertTuyt]

One can calculate the ELO Difference D-ELO between 2 programs A and B, as follows.
Assume the win probability or expected outcome = E (E=1, program A wins always against program B, E=0, program A loses always against program B).

Than: D-ELO = 400 * log10( E/(1-E) )

Note for E = 0.5, D-ELO = 0

Bert

[Krzysztof Grzelak]

One can calculate the ELO Difference D-ELO between 2 programs A and B, as follows.
Assume the win probability or expected outcome = E (E=1, program A wins always against program B, E=0, program A loses always against program B).

Than: D-ELO = 400 * log10( E/(1-E) )

Note for E = 0.5, D-ELO = 0

Bert

Please give an example, because it is very complicated writing Bert.

[Jelle Wiersma]

At a speed of 99 moves in 15 minutes, Scan played 46 draws and 4 wins against Sjende Blyn.
E = (46*1+4*2)/(50*2) = 0.54
D-ELO = 400 * log10 ( 0.54 / (1-0.54) ) = 28