lasker-2.2.3/bots/mamer/help/rating

   1 mamer_rating
   2
   3 mamer rating formula
   4 --------------------
   5
   6  Pre_tourney stats:
   7    pre_wins
   8    pre_draws
   9    pre_losses
  10    pre_rating  - this is what we have to initialize
  11
  12
  13  From the tourney just completed:
  14    tourn_wins, tourn_draws, tourn_losses
  15
  16  Post tourney stats: stuff that is saved.
  17    post_wins, post_draws, post_losses, post_rating
  18
  19
  20  Calculations:
  21   tourn_expect = sigma(over all rounds) {1/[1+10^(delta/400)]}
  22          delta = player_FICS_rating - opponent_FICS_rating
  23
  24     pre_expect = (pre_wins + 0.5*pre_draws)/pre_rating
  25
  26      post_wins = pre_wins + tourn_wins
  27     post_draws = pre_draws + tourn_draws
  28    post_losses = pre_losses + tourn_losses
  29
  30    post_rating = (post_wins + 0.5*post_draws)/(pre_expect + tourn_expect)
  31
  32
  33   Comments:
  34 ----------------
  35 Ratings will tend to be near 1.0, and a typical range is 0.5 to 1.5.
  36 Ratings are initialized based on your win percentage.
  37
  38  Questions, comments, suggestions?? contact mlong.
  39
  40 [Last modified: August 19, 1998 -- fpawn & mlong]