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-'''Toutenkou''' {{kana|東天紅}} is a special [[sanma|3-player mahjong]] variation mainly popular in [[wikipedia:Kantō_region|Kanto region]]. Currently available in [[Tenhou.net|Tenhou]] computer matches (beta test).
+'''Toutenkou''' {{kana|東天紅}} is a [[sanma|3-player mahjong]] variant mainly popular in [[wikipedia:Kantō_region|Kanto region]]. It is currently available in [[Tenhou.net|Tenhou]] computer matches (beta test).
+'''Disclaimer''': This page only introduces the rules used in Tenhou. Details are not consistent, and variation exists in other platforms.
-'''Disclaimer''': This page only introduces rules used in Tenhou. Details are not consistent, and variation exists in other platforms.
 == Rule Introduction ==
-Only uses {{#mjt:159m}} of [[manzu]] tiles, while all of [[pinzu]], [[souzu]] and [[honor]] tiles are used (including red fives {{#mjt:0m0p0s}}). 112 tiles in total.
+There are 112 tiles, 28 types in total. All [[pinzu]], [[souzu]], and [[honor]]s are used; only {{#mjt:159m}} of [[manzu]] are used.
-{{#mjt:159m4z}} are gari {{kana|ガリ}} (similar to [[Dora#Nukidora|nukidora]]). 20 rinshan tiles in total.
+{{#mjt:159m4z}} are gari {{kana|ガリ}}; gari tiles function identically to [[Sanma|nukidora]] in [[sanma]]. There are 20 rinshan tiles in total:
+* They can be called and set aside to count as 1 dora. After the call, one tile is drawn from the dead wall; winning with the tile scores [[rinshan]].
+* They can be used in the hand or discarded, but won't count as points.
-A valid winning hand must include at least one of any regular yakus (identical to regular riichi mahjong yakus). A hand cannot win with only special yakus.
+===Scoring===
+A valid winning hand must include at least one regular [[yaku]]; it cannot win with just special yaku. The list of "regular yaku" is identical to the standard riichi mahjong yaku.
 Instead of calculating with [[fu]] and [[han]], the score is only counted with points.
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 == Special Yakus ==
-'''Notes''': All of the followings are bonuses. A hand cannot be claimed with only those following yakus.
+All valid winning hands obtain 2 points by default (listed as '''base point''' / '''banban''' {{kana|バンバン}}).
+All of the following yaku are bonuses. Like [[dora]], a hand cannot be won with only these yaku:
 (1 pt) '''Oya''' {{kana|親}}: Add one point when winning as dealer.
-(1 pt) '''Menzen''' {{kana|門前}}: Add one point when the winning hand is concealed.
+(1 pt) '''Menzen''' {{kana|門前}}: Add one point when the winning hand is closed.
 (1 pt) '''Honba''' {{kana|本場}}: Add one point for each [[honba]].
-(1 pt) '''Gari''' {{kana|ガリ}}: Add one point for each nukidora ({{#mjt:159m4z}}). For {{#mjt:0m}} it is also a red dora, so it actually worths 2 points.
+(1 pt) '''Gari''' {{kana|ガリ}}: Add one point for each tile called for ''gari'' and set aside like nukidora ({{#mjt:159m4z}}). {{#mjt:0m}} is also a red dora, so it is worth 2 points.
-(2 pts) '''Base point''' / '''Banban''' {{kana|バンバン}}: Add two points for each winning hand for no reason.
 (2 pts) '''Minkan''' {{kana|明槓}}: Add two points for each opened kan.
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 (4 pts) '''Ankan''' {{kana|暗槓}}: Add four points for each concealed kan.
-(4 pts) '''Set''' {{kana|セット}} <ref group="note">Set is also called Storm / Arashi {{kana|アラシ}} in some platform.</ref> : Add four points for each collected set of gari (four identical tiles of gari). Can be stacked with gari.
+(4 pts) '''Set''' {{kana|セット}} <ref group="note">Set is also called Storm / Arashi {{kana|アラシ}} in some platforms.</ref> : Add four points for each collected set of gari (four identical tiles of gari). Can be stacked with gari.
+* Does not require the gari tiles to be called, e.g., a closed triplet of 5m + a called 5m will still count towards this yaku.
-(8 pts) '''Ron''' {{kana|ロン}}: Add eight points when winning by other's dealing-in.
+(8 pts) '''Ron''' {{kana|ロン}}: Add eight points when winning by another player's discard.
-(10 / 20 pts) '''Crow''' / '''Karasu''' {{kana|カラス}}: Winning a hand without drawing any gari tiles. Add ten points when winning hand is opened, while twenty points when concealed.
+(10 / 20 pts) '''Crow''' / '''Karasu''' {{kana|カラス}}: Win a hand without drawing any gari tiles. Worth ten points when winning hand is opened, or twenty points when concealed.
 (20 pts) '''All Gari''' {{kana|全ガリ}}: Add twenty points when collecting all gari tiles. Can be stacked with gari.
 == Notes ==
-* Dora for manzu part is a bit weird. When indicator is {{#mjt:1m}}, dora is {{#mjt:9m}}; when indicator is {{#mjt:9m}}, dora is {{#mjt:1m}}; however when indicator is {{#mjt:5m}}, none of the tiles is dora. <ref group="note">In general, to determine dora for manzu tiles, there're two different ways in use. One is <code>1m → 5m → 9m → 1m</code>; the other is <code>1m → 9m → 1m</code> while <code>5m → 5m</code>.</ref>
+* Dora for manzu:
-* Gari tiles can be used in hand, and also can be discarded, but can only get Gari's point when it is claimed as a nukidora.
+** A 1m indicator points to 9m; a 9m indicator points to 1m.
-* Set is still acquirable with some gari tiles used in hand. They're not required to be all claimed as nukidora.
+** When 5m is the indicator, no tile is considered dora.<ref group="note">Outside of tenhou, there are two separate rulesets in use. One is <code>1m → 5m → 9m → 1m</code>; the other is <code>1m → 9m → 1m</code> while <code>5m → 5m</code>.</ref>
-* [[Riichi]] values 1 point. Riichi bet is also 1 point.
+* [[Riichi]] is worth 1 point. The riichi bet is also 1 point.
-* A single round ends when there's no tile left before dora indicators.
+* A single hand ends when there's no tile left before dora indicators.
-* Noten penalty of [[ryuukyoku]] is 20 points.
+* The noten penalty of [[ryuukyoku]] is 20 points.
 * Gari can be claimed even in last turn.
-* [[Rinshan Kaihou]] is available with rinshan tiles drawn from Gari.
+* [[Yakuman]] yaku cannot stack with other regular non-yakuman yaku as usual, though they can still stack with toutenkou-specified special yakus. Each yakuman is worth 20 points.
-* Crow / Karasu requires no any gari tiles both existing in hand, in discards and used as nukidoras.
-* [[Yakuman]] yakus cannot stack with other regular non-yakuman yakus as usual, though they can still stack with toutenkou-specified special yakus. Each yakuman yaku values 20 points.
 == References ==