MahjongSoft is pleased to announce Annual Riichi Marathon 2025-2026 (MIL rules version, the same as EMA 2016 rules version), a long-term open online tournament, which starts on 01.03.2025 at 00:00 and ends on 28.02.2026 23:59 (UTC+3).
Marathon is opened to all players, with no restrictions with respect to participation, or the number of accounted games.
Annual Riichi Marathon 2025-2026 is composed of four periods, which are called as "seasons":
All games played by a player within a period are then consolidated using four-component formula to get player's score. All player's scores are then ranked accordingly to get rank (place) and basic rank for the considered period.
The player's annual result is a sum of basic rank values taken from each of four periods.
The table of results by periods is available at Marathon results by periods page.
The table of annual results is available at Results of Annual Marathon page.
Please, choose the rules and period in a drop-down menu accordingly.
Annual Riichi Marathon 2025-2026:
Comment: medals will be awarded provided there are at least 16 players with the non-zero annual result.Each season:
Comment: medals will be awarded provided there are at least 16 players with the non-zero basic rank for the respective season.To enter Riichi Marathon, please, enter the table marked "Riichi Marathon" on the starting page.
Comment: participant has to have a valid the "verified user" ("VU") status.
The disconnected during Riichi Marathon game player is replaced by the system by so-called "inert" bot, which does not have any functions except to discard freshly taken from the wall tile (hence, no declarations are possible by such inert bot). Any moves made by the system while a player is disconnected are called as "automoves", AM, that concept is then used to determine Riichi Marathon game possible disqualification.
To enforce "healthy" competition, and to address disconnected players issue, the following criteria for Riichi Marathon games disqualification will be applied:
The ultimate value to maintain high-standard online competition is keeping in the current game ALL PLAYERS online. No penalty can be viewed as a full-fledged compensation of the disconnected player, no matter whether the solution is "technical" (replacing player with a bot), or "statistical" (scoring penalty), or "legally enforced" (suspension of player from the participation). Furthermore, the event organizer never can distinguish two cases of the disconnected player, whether the reason is "technical" (no internet connection), or "psychological" (abandoning the game for any reason). The participants of Riichi Marathon are strongly advised to ensure good internet connection, to have the "backup scenario" (the second device to play, subscription for the alternative internet provider, etc), to restrain from playing in Riichi Marathon having "seemingly bad" internet connection; the way to improve may be a change of browser, playing device, or even internet provider.
IMPORTANT NOTE: Any time when a player has got 80 or more AM during Riichi marathon game, that player receives so-called "progressive ban" point. In addition, one more "progressive ban" point is added if that Riichi marathon game has been disqualified. The player is then penalized by losing the "verified user" ("VU") status for the period in days equal to the amount of accumulated "progressive ban" points. After player receives 5 or more "progressive ban" points, the whole scale of "ban days" has been changed: 5 cases would lead to 30 days, 6 cases would lead to 90 days, 7 cases or more would lead to 365 days of losing the "verified user" ("VU") status, which would lead, in turn, to impossibility to participate in Riichi Marathon, or other tournaments. It is important to know, that all records of "progressive ban" points are kept on the continuous basis. Furthermore, any "progressive ban" point expires after 365 days upon acquiring it.
Deals per session: 8+ (hanchan), Time for session: 60 min., Time for own action: 8 sec., Time for declaration: 6 sec., Additional time: 10 sec., Time for results: 10 sec.
Marathon is a long-term open tournament, usually played by periods. Marathon is opened to all players, with no restrictions with respect to participation, or the number of accounted within a period games.
The player's score within a period is a weighted sum of four components: 50%*average_TP (taken for all games) + 50%*average_TP (taken for best 10 by TP games) + 1%*number_of_games + 10%*average_TP_opponents (against whom player played).
Comment: TP stands for total_points divided by 1000, that is the sum of game_points and bonus_points, which players receives from each game played, though that sum is divided by 1000.
To be rated, 10 games have to be played by the player within a period. While determining the player's score, all missing to the amount of 10 games will forceably be counted as having 0 TP.
For the sake of simplicity, all the components are rounded to the two digits after decimal point. For tied results number_of_games is used as an additional criterion — the lesser is that number, the higher player's score is.
All players' scores within the same period are then ranked (including breaking-ties algorithms). Each player, who played the established within a period minimum number of games (10), is called as "qualified player". Each "qualified player" receives so-called "Basic Rank" (BR) according to the formula:
BR = 1000*(number_of_qualified_players-player's_place+1)/number_of_qualified_players, rounded to the closest integer number
All players who have not played within a considered period the established minimum number of games (10), receive BR=0.
In "Annual Marathon" all the "Basic Rank" (BR) values, received in individual periods, are summed up to obtain "annual" player's result.
The disconnected during Riichi Marathon game player is replaced by the system by so-called "inert" bot, which does not have any functions except to discard freshly taken from the wall tile (hence, no declarations are possible by such inert bot). Any moves made by the system while a player is disconnected are called as "automoves", AM, that concept is then used to determine Riichi Marathon game possible disqualification.
To enforce "healthy" competition, any game with seemingly unequal opportunities to compete should not be counted (disqualified). Thus, any games having "excessive" number of "automoves" should be disqualified. Furthermore, the player who had "excessive" number of "automoves" is penalized by losing the "verified user" ("VU") status for the certain period, up to 365 days!
Updated: 19.02.2025