Boston Riichi Open 2026

Boston Riichi Open 2026

8 Round cummunulative with no cut. Swiss pairings based on performance. Seats and winds determined by random draw.

World Riichi Championship 2025 Ruleset with the following optional modifications:

2.1 Red Fives, 3.2 Nagashi Mangan, 4.1 Modified Uma (+30, +10), 4.4 Counted Yakuman

Kiriage Mangan is on.
Immediate Dora Flips for all Kans.
Pao (liability payments) is off.
Busting is off. If a player's points reduce below zero, they will be given Busting Sticks and will have 20,000 points deducted from their final score.
Timer is 75 min + 0.

30, 10 Uma. No Oka.

We invite you to read our complete rules and penalties here.

By entering, you consent to follow Mass Riichi's Player Code of Conduct.

Please familiarize yourself with these rules and expectations before attending.

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Host or Publisher Massachusetts Riichi Society (Mass Riichi)