WRR: +15/+5/-5/-15 EMA: +30/+10/-10/-30 (was +9/+3/-3/-9 until 2012) JPML A: see below JPML B: +15/+5/-5/-15 (was +30/+10/-10/-30) Nihon Pro Mahjong: +30/10/-10/-30 (plus oka=20, the other rules I've listed here have a 0 oka) Saikouisen: +30/+10/-10/-30 Saikouisen Classic: +12/+4/-4/-12 Real Mahjong Unit: +15/+5/-5/-15 Korean Mahjong League: +20/+10/-10/-20 USPML: +30/+10/-10/-30 Club Riichi de Montréal: 0/0/0/0
JPML A's uma depends on how many players are "positive" (>=30k) or "negative" (<30k): 1 player positive: +12/-1/-3/-8 2 players positive: +8/+4/-4/-8 3 players positive: +8/+3/+1/-12 all players negative: +8/+4/-4/-8