The 9th Cho Chikun (25th Honinbo) Cup 42.195 Marathon Go Championship
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Popular event 42.195 Marathon Championship was well received so we organize it again this year.
You have 42 days and 19.5 hours to play your games, as many as possible (with a minimum percentage).

However, this year there are some minor changes in the basic rules of Marathon Go Championship: We believe in "Health First" policy. Therefore, the playing time is limited to 5 hours a day (please refer to the details below)

Cho Chikun (25th Honinbo), the referee of the event always tries to spread the game of Go.

About the tournament
official sponsor:PANDANET
special support:Japan Pair Go Association
Referee:Cho Chikun (25th Honinbo)
Winner:Player with most games and at least 30% winning percentage
Period : July 20th through August 31st (Japan time)
Registration period
Registration period :30th of June till 15th of July (Japan Time)
How to register:click the green button above or below
Entry fee:free of charge
Participants:all members of PANDANET
Tournament rules
In Marathon Go event, you compete for the number of games played in the designated period. However the following games will not be counted:
  • The maximum playing-time per day is 5 hours and any game starting after this time limit will not be counted (In case of a game played over two days in Japan Time, it shall be counted in the date it has started).
  • A game not started within the designated period
  • A game which was interrupted due to disconnection by both players
  • A game played on other than 19x19 board
  • A game played against Robot (Robots' User IDs begin with "Robot")
  • A game played with Professional players teaching games
  • A game that does not meet the following time requirements:
    (1) Pandanet style: at least 5 minutes for 25 moves
    (2) Byoyomi style: at least 20 seconds per move
    (3) No Byoyomi: at least 30 minutes for one game
  • A game with less than 40 moves
  • A game which Organizing Committee considered to be inappropriate

[ Ranking ]

Participants with the winning percentage of 30% or more are subject to the final ranking and the winners will be decided as follows:
  1. A player with largest number of games played, if the tie remains, then:
  2. A player with better winning percentage, if the tie remains, then:
  3. A player with larger moves (the sum of all games), if the tie remains, then:
  4. These players are considered co-winners
The Organizing Committee reserves the right to disqualify any player who is excessively discourteous to other players.
Prizes and prize giving
Prize winner will be announced on the PANDANET website
A high-ranking prizewinner(1-5 rank) winners will receive a trophy and a diploma signed by Cho Chikun from the Japan Pair Go Association

Result updates
Results will be published on the PANDANET website. The final results will be published in September.
The results will not be subject for any discussions.

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