View source for Professional League Game Rules



==Scoring treatment==
Wins may be treated differently according to the rules in effect in a pro league, a jansou (or chain), a game server, or an organization.
{| class="wikitable sortable"
|-
! Index !! Rule !! M-League !! <-§ !! JPML 競技!! <-§ !! Saikouisen !! <-§ !! NPM !! <-§ !! MU !! <-§ !! RMU !! <-§ 
|-
| 000 || 1-han limit || Yes || §1.3 || 
|-
| 000 || Basic dora || Yes || §2.6.1 || Yes || (Implied)
|-
| 000 || Kan dora || Yes (4) || §2.6.2<br />§4.5.4 || No || §1.3<br />§4.1
|-
| 000 || Hidden dora || Yes || §2.6.3 || No || §1.3<br />§4.1
|-
| 000 || Red dora || Yes (3) || §2.6.4 || No || (Implied)
|-
| 000 || Seat shuffle || 4 tiles || §3.1 || ___ || ___
|-
| 000 || Abortive draws || None || §3.2.3 || Yes (4) || §3.3
|-
| 000 || Busting out || None || §3.2.4 || ___ || ___
|-
| 000 || Furiten riichi || Yes || §4.8.3 || Yes || §6.2 ||
|-
| 000 || Drawless riichi || Yes || §4.8.3 || Yes || §2.5 || 
|-
| 000 || Endgame deposits || Top || §4.8.5<br />§6.2.5 || "Deposit"??|| §2.4
|-
| 000 || Kan after riichi || Same tile || §4.8.9 || Same shape || §4.5
|-
| 000 || Multiple win cases || 1 || §5.1.3 || 1 || §1.6
|-
| 000 || Starting points || 25,000 || §6.1 || Not specified || N/A
|-
| 000 || Target points || 30,000 || §6.2.1 || Same || N/A
|-
| 000 || Conversion before || N/A || N/A || +XX.X<br />▲YY.Y || (§8.0)
|-
| 000 || Ante || +20,000 || §6.2.3 || None || (implied)
|-
| 000 || Placement bonus: 1st || +30,000 || §6.2.3 || +12/+8/+8 || §8.0
|-
| 000 || Placement bonus: 2nd || +10,000 || §6.2.3 || -1/+4/+3 || §8.0
|-
| 000 || Placement bonus: 3rd || -10,000 || §6.2.3 || -3/-4/+1 || §8.0
|-
| 000 || Placement bonus: 4th || -30,000 || §6.2.3 || -8/-8/-12 || §8.0
|-
| 000 || Conversion after || +XX.Xp<br />▲YY.Yp || §6.2.4 || N/A || N/A
|-
| 000 || Split ranks on tie || Yes || §6.2.6 || Yes || §8.0
|-
| 000 || Split deposits on tie || 500+500<br />400+300+300 || §6.2.6 || ___ || ___
|-
| 000 || Double wind pair || 2 fu || §6.3.2 || 4 fu || §7.4 
|-
| 000 || Rinshan draw points || unknown || unknown || 0 fu || §7.5 
|-
| 000 || Rounded mangan || Yes || §6.6.1 || No || §7.1 || 
|-
| 000 || Cumulative yakuman || Yes || §6.6.1 || Yes || §7.3
|-
| 000 || Counted yakuman || No || §6.6.2 || No || §7.2
|-
| 000 || Fault: Long hand || Dead || §7.2.1 || Chombo || §6.4
|-
| 000 || Fault: Short hand || Dead || §7.2.1 || Chombo || §6.4
|-
| 000 || Fault: Future draw || Dead || §7.2.2 || ___ || ___
|-
| 000 || Fault: Pick-and-switch || Dead || §7.2.3 || Allowed<br />(diff. tile) || §1.2 ||
|-
| 000 || Fault: Empty call || Dead || §7.2.4 || Dead || §6.4
|-
| 000 || Fault: Empty tsumo/ron<br />hand remained concealed || Dead || §7.2.4 || Chombo || §6.3
|-
| 000 || Fault: Tsumo for ron<br />or ron for tsumo || Warning || §7.2.4 || ___ || ___
|-
| 000 || Fault: Bad grouping || Dead || §7.3.1+2 || Chombo || §6.4
|-
| 000 || Chombo penalty || ▲20p || §7.4.1 || ___ || ___
|-
| 000 || Fault: Bad ron/tsumo<br />hand was exposed || Chombo || §7.4.2.1 || Chombo || §6.3
|-
| 000 || Fault: Noten riichi on draw || Chombo || §7.4.2.2 || Chombo || §2.3
|-
| 000 || Fault: Illegal kan after riichi || Chombo || §7.4.2.2 || ___ || ___
|-
| 000 || Fault: Breaking walls before scoring || Chombo || §7.4.2.3 || ___ || ___
|-
| 000 || Fault: Breaking uradora before scoring || Chombo || §7.4.2.3 || ___ || ___
|-
| 000 || Fault: Intentional destroyed wall || Chombo || §7.4.2.4 || ___ || ___
|-
| 000 || Fault: Unintentional destroyed wall || Chombo || §7.4.2.5 || ___ || ___
|-
| 000 || YELLOW CARDS || None || §7.5 || ___ || ___
|-
| 000 || Liability: 3 Dragons || Yes || §8.0.1 || Yes || §5.1
|-
| 000 || Liability: 4 Winds || Yes || §8.0.2 || Yes || §5.1
|-
| 000 || Liability: 4 Kans || Yes || §8.0.3 || Yes || §5.1
|-
| 000 || Liability: Live tile kan || No || N/A || Yes (furiten<br />override!) || §4.2
|-
| 000 || Override: Closed kan kokushi || ??? || N/A || Yes || §4.3
|-
| 000 || Count both rinshan + haitei || No || §5.4 || No || §4.4
|-
| 000 || One-shot yaku || Yes || §9.1.2 || No || §1.3 
|-
| 000 || All Green yaku dragon required || No || §9.5.6 || Yes || §7.6 
|-
| 000 || Runaway victory || unknown || unknown || No || §1.8 
|-
| 000 || Abortive draws || None || §3.2.3 || ___ || ___
|-
| 000 || Abortive draws || None || §3.2.3 || ___ || ___
|-
| 000 || Abortive draws || None || §3.2.3 || ___ || ___
|}
1. Trivial rules are not recorded, that should form the basis of a basic riichi rules page.<br/>
2. "Priority" designates current player priority (from discarder: Right > Across > Left), and not game seating priority as used to split ties on Tenhou (starting: East > South > West > North).