Oorasu Condition Calculator
Final-hand score requirement calculator for 4-player riichi mahjong — any scores, rules, or uma.
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Rules
Preset rules
M-League
Saikouisen
Saikouisen Classic
WRC
JPML A
Starting score
Uma + Oka (1st, 2nd, 3rd, 4th)
Honba
Riichi sticks on table
Reset game
Players
Dealer
Name
Current score
Rank
Previous total
Overall total
Overall rank
"Overall total" = previous total + this game's uma-adjusted result if the current scores held at hand end. Used for the session-wide standings below.
Condition to check
Player
Target
Ron / Tsumo requirements
Deal-in tolerance
Simulate a specific result
Winner
Method
Ron
Tsumo
Off of (direct hit)
Hand
Exhaustive draw outcome