Japan Chess Championship 2023 – The 24th Argentina Cup



Date: Wednesday (National Holiday), May 3 – Sunday, May 7

Venue: Curian (Shinagawa Ward General Civic Hall) 6F Main Conference Room

5-18-1 Higashi-Oi, Shinagawa-ku, Tokyo (Map)

Format: 9R, 90m+30s/move, NCS and FIDE standard rated



Entry criteria: Must be a member of NCS during the tournament period and seeded player of the Japan Championships (see the list of seeded players for the Japan Championships in 2023).

Non-Japanese chess players are also eligible to participate and win prizes, but the title of Japanese Chess Champion will be given only to players of Japanese chess nationality.

Entry fee: 20,000 yen

Registration: Purchase Peatix during the registration period.

The registration URL will be sent separately to the seeded players in early March.
(It will be sent sequentially to the players seeded after that.)

Entries are accepted from the day when the above mail is sent to 23:59 on Wednesday, April 26



Wednesday (National Holiday), May 3

09:30-10:10 Check-in

10:10 Opening Ceremony

10:30 R1

15:30 R2

Thursday (National Holiday), May 4

09:30 R3

14:30 R4

Friday (National Holiday), May 5

09:30 R5

14:30 R6

Saturday, May 6

09:30 R7

14:30 R8

Sunday, May 7

09:30 R9

14:00 Prize Giving


Prizes/Qualified players:

  • 1st place-50,000 yen, 2nd place-30,000 yen, 3rd place-10,000 yen, 4th place-7,000 yen, 5th place-5,000 yen
  • Awards will be given to the top 1 to 5 finishers. Awards for 1st place each in Women’s, Junior (U18), and Senior (O50).
  • Rankings will be determined using a tie-breaker. No sharing of prize money on the same points.
  • The top 5 finishers and the first woman, junior, and senior finishers will be seeded for the Japan Chess Championship 2024.
  • The highest ranked Japanese chess national will be recognized as the Japan Chess Champion and will receive the Argentine Cup from the Embassy of the Argentina Republic.
  • The top 5 finishers will receive a bottle of Argentine wine.
  • Plaques will be awarded to the top 1-5 finishers and to the first-place finishers in the women’s, junior and senior categories.
  • The top one Japanese chess national will be informally selected to represent Japan at the 2024 Chess Olympiad. (For details, see “Selection Criteria for the Japanese Representatives for the Chess Olympiad 2024 onwards“)
  • Tiebreakers will be used for ranking, and prize money will not be shared among players with the same points.
  • We will select the representatives for international tournaments from players who belong to Japan Chess Federation, based on the results of this tournament.

Other regulations

Tournament rules

  • Tie-breaks: 1) Buchholz Cut-1, 2) Buchholz, 3) Sonneborn-Berger, 4) Sum of the ratings of the opponents, 5) Drawing of lots.
  • Default time:  If any player is not present within 30 min after the game started, she/he shall lose the game by default. The game is not rated.
  • Pre-registered byes: 0.5 point bye requests will be accepted until 18:00 on the day before the tournament. (Please fill in the Bye Register Form) However, 0 points are given for the last 2 rounds. Pairing-allocated bye will be 1 point.  If a player has more than 2 requested byes, the player will not qualify for prizes.
  • Pairings of the first round will be published at 20:00 the day before the tournament.
  • The organizer will provide chess equipment, including clocks and score sheets. Players must use them.
  • Players must record all moves. Once the game is finished, both players sign and hand over the original score sheets to the arbiters. Make sure the results are correct before signing.
  • All electronic devices, smartphones, tablets or smartwatches must be turned off and put away in a bag during games. Players may not wear or carry them out of the venue during the game. This rule applies whether or not the electronic device’s switch is on. Violation of this rule will result in a loss for the offending player, not a forfeited game. During the game, we prohibit using communication devices, including smartphones, in the venue, for visitors and players who have finished the game.
  • The pairings will be done according to the March NCS rating. If there are 2 players with the same NCS rating, the title and the alphabetical order of the players will be used.
  • The tournament will follow FIDE rules unless otherwise stated above. (2nd illegal move – loss of the game. Pressing the clock by mistake or pressing it with the other hand, which touched a piece, will also be judged as an illegal move)


Media related rules

  • The tournament results will be posted on the Internet (chess-results.com) for reporting purposes. The game record may also be published on the Internet. Participants agree to the publication of their real names, results, and game records.
  • Observers are allowed to take photos for the first 10 minutes of each game, including the use of a mobile, but after 10 minutes, all mobiles have to be put away by the observers, and they are not allowed to use them in the playing room. Exception for people with special permission.
  • Individuals who wish to use photos or videos of participants (during games, award ceremonies, etc) must be careful to protect their privacy. In addition to obtaining comprehensive consent in advance, for example, in the case of minors, the permission of their guardians must be obtained, and due consideration must be given to the protection of personal information and portrait rights.
  • The organizer will take photos, record videos, and broadcast live coverage of the event. These may be published and used in media such as websites, SNS, video sites, and journals managed by NCS. Participants are supposed to agree to publish and broadcast these photos and videos.


COVID-19 Guidelines

  • All players have to follow the COVID-19 Guidelines 3rd Edition.
    (Revisions will be made in light of the currently planned changes of the position of COVID-19 under the Infectious Disease Control Law and the related revision of the mask-wearing rule, etc.)
  • No observers are allowed without permission. Please contact NCS. You need to have permission by email the day before the tournament starts. (mail: japanchess.info@gmail.com ) However, one parent or guardian per underage participant is allowed in the venue.


Other rules

  • The organizer reserves the right to change the above conditions in case of reasonable cases before the first round begins.
  • Due to the spread of coronavirus infection or other unforeseeable reasons, there may be unavoidable changes to the duration of the event, or the event may be canceled.
  • If cancellation is made before the day 8-days before the registration deadline and the number of participants has not reached the maximum number, a refund will be made.We do not refund from 7-days before the application deadline. We do not refund once the number of applicants has reached the maximum.
    ( email : japanchess.info@gmail.com
  • NCS cannot be held responsible for any problems that occur between individuals.
  • If there is a discrepancy between English and Japanese, Japanese version prevails.

Organizer and Sponsorship


Japan Chess Federation


  Embassy of the Argentine Republic in Japan