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Tenhou.net ranking: Difference between revisions
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== Ranking system == | == Ranking system == | ||
Tenhou.net uses two different number systems to determine player ranking: kyuu/dan ranks and the | Tenhou.net uses two different number systems to determine player ranking: kyuu/dan ranks and the Elo system. For every game, points may be awarded or deducted based on game placement (1st throught 4th). The points awarded or deducted are noted in tables below. Placing 1st or 2nd awards points, while 4th has points deducted. Prior to the rank of 2級 (2-kyuu), players need not worry about point deductions. Afterwards, that would no longer be the case. | ||
Every time a player moves up in rank, the points in Tenhou default to the value indicated at '''base points''' {{kana|初期pt}} column. If those base points fall below zero, then the player drops a rank. If the player attains enough points to surpass the '''target points''' {{kana|昇段pt}}, then a rank promotion occurs. | Every time a player moves up in rank, the points in Tenhou default to the value indicated at '''base points''' {{kana|初期pt}} column. If those base points fall below zero, then the player drops a rank. If the player attains enough points to surpass the '''target points''' {{kana|昇段pt}}, then a rank promotion occurs. | ||
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===The R rating=== | ===The R rating=== | ||
At the very beginning, every player begins with a base rating of 1500. That number increases or decreases based on wins or losses, as well as the relative rating of the other players. The change in rating after each game is applied as follows:<ref> | At the very beginning, every player begins with a base rating of 1500. That number increases or decreases based on wins or losses, as well as the relative rating of the other players. The change in rating after each game is applied as follows:<ref>https://tenhou.net/man/#Rating</ref> | ||
Rating_change = Adjustment*( | Rating_change = Adjustment*(Placement_base+(Average_table_rate - Own_rate)/40) | ||
Placement_base = 30/10/-10/-30 for ''yonma'', 30/0/-30 for ''sanma''. | |||
Adjustment = 1-(Games_played*0.002); if games played < 400, 0.2 if games played >=400 | Adjustment = 1-(Games_played*0.002); if games played < 400, 0.2 if games played >=400 | ||