Suukantsu: Difference between revisions

Suukantsu
Type	Yakuman
Kanji	四槓子
English	Four kans
Value	Yakuman
Speed	Extremely slow
Difficulty	The most difficult

VisualWikitext

Latest revision as of 13:01, 24 August 2024

Suukantsu 「四槓子」 is a yakuman scored when the hand has called kan four times. Suukantsu is the rarest hand in the game, even rarer than tenhou or chiihou. It is also the longest, requiring 18 tiles total.

Tile pattern

Agari:

Development

Suukantsu tenpai with an inescapable hadaka tanki situation.

This yakuman requires four kan calls. As a result, the hand in tenpai always has a hadaka tanki wait. In order to call each kan, a player must draw at least 3 out of 4 tiles of a single tile type:

A player has a pair and calls pon, then draws the fourth to call kan.
A player has a closed triplet and calls kan on a discarded fourth.
A player draws all four of a tile type and calls kan.

Since suukantsu requires a player to draw into four closed triplets, any hand that scores suukantsu would also have met the requirements for the significantly easier suuankou. Since they are both worth the same value, there are very few reasons to go for suukantsu.

Reasons why suukantsu is so difficult:

You must obtain a total of 4/4 tiles of four different types, where 3/4 are self drawn.
If any other player has called kan, the hand becomes impossible. If playing with abortive draws, this will trigger suukaikan. If playing without, then players are still only allowed a combined total of 4 kans in one game, preventing the yakuman.
Calling four kans adds a total of four kan dora, which will greatly boost the value of others' hands. A player may not want to kan even once in order to avoid the extra dora.
Open & added kans are the easiest type of kan, but they require you to open your hand. Since there is no yaku for a kan until the third kan, committing to an open kan is risky.
Calling four kans immediately reveals you have a yakuman hand, so players are likely to defend.
The hand always has a hadaka tanki wait.

Finally, like any other yakuman, another player could have a faster hand and win before you.

Value

Despite the greater degree of difficulty and exceptionally low frequency of occurrence, the value remains as that of the other single yakuman.

External links

四槓子

Suukantsu in Japanese Wikipedia

@@ Line 15: / Line 15: @@
 * [http://tenhou.net/0/?log=2013020807gm-0009-7447-8494ff98&tw=3&ts=2 With chinroutou]
 * [http://tenhou.net/0/?log=2010101720gm-0009-0000-4e36568a&tw=2&ts=1 Four daiminkan]
+* [http://tenhou.net/0/?log=2016051320gm-00c1-0000-3e439565&tw=2&ts=3 With suuankou]
 }}
-'''Suukantsu''' {{kana|四槓子}} is a standard [[yakuman]], where the hand has collected [[kan]] four times.  As a result, this hand always has uses a [[Tanki|hadaka tanki machi]], because four [[naki|tile calls]] are required.  Unlike all the other patterns, this yakuman cannot afford to have particular tiles unavailable via discards, the [[dead wall]], or used in other player's hands.  By far, it is the longest possible hand in the game, requiring 18-tiles.  Of all the hands possible, suukantsu is the rarest.  It is even more rare than either [[Tenhou and chiihou|tenhou]] or [[Tenhou and chiihou|chiihou]].
+'''Suukantsu''' {{kana|四槓子}} is a [[yakuman]] scored when the hand has called [[kan]] four times. Suukantsu is the rarest hand in the game, even rarer than [[tenhou and chiihou|tenhou or chiihou]]. It is also the longest, requiring 18 tiles total.
 ==Tile pattern==
@@ Line 23: / Line 24: @@
 {{#mjt:4z}} {{#mjt:0z44p0z1'111m777'7s0660z}} Agari: {{#mjt:4z}}
-==Viability==
+==Development==
-This yakuman requires four kan calls.  As a result, the hand in [[tenpai]] always uses [[Tanki|hadaka tanki]].  In order to call a single kan, a player must draw at least 3 out of 4 of a single tile type under any of these three scenarios:
+[[Image:Hadakabind.png|thumb|250px|right|Suukantsu tenpai with an [http://tenhou.net/0/?log=2014031007gm-0009-7447-xfcc2dd624f0d&tw=3 inescapable hadaka tanki situation].]]
-* A player has a pair and calls pon.  Then draws the fourth to [[shouminkan|call kan]].
+This yakuman requires four kan calls. As a result, the hand in [[tenpai]] always has a [[Tanki|hadaka tanki]] wait. In order to call each kan, a player must draw at least 3 out of 4 tiles of a single tile type:
+* A player has a pair and calls pon, then draws the fourth to [[shouminkan|call kan]].
 * A player has a closed triplet and [[daiminkan|calls kan]] on a discarded fourth.
 * A player draws all four of a tile type and [[ankan|calls kan]].
-For this yakuman, a player must repeat any of those kan calls four times.  This yakuman is the most difficult yakuman to attain tenpai, let alone score.  If any of those tiles are rendered unavailable for kan, it forces the hand to seek other possible tiles to call kan with; or the hand is made virtually impossible.
+Since suukantsu requires a player to draw into four closed triplets, any hand that scores suukantsu would also have met the requirements for the significantly easier [[suuankou]]. Since they are both worth the same value, there are very few reasons to go for suukantsu.
-===Pitfalls===
+Reasons why suukantsu is so difficult:
-[[Image:Hadakabind.png|thumb|250px|right|Suukantsu tenpai with an [http://tenhou.net/0/?log=2014031007gm-0009-7447-xfcc2dd624f0d&tw=3 unescapable hadaka tanki situation].]]
+*You must obtain a total of 4/4 tiles of four different types, where 3/4 are self drawn.
-The difficulty of this yakuman stems from the numerous pitfalls during its [[Tile efficiency|hand development]].  Any one of these scenarios can prevent this yakuman from completion.
+*If any other player has called kan, the hand becomes impossible. If playing with abortive draws, this will trigger [[suukaikan]]. If playing without, then players are still only allowed a combined total of 4 kans in one game, preventing the yakuman.
+*Calling four kans adds a total of four kan dora, which will greatly boost the value of others' hands. A player may not want to kan even once in order to avoid the extra dora.
+*Open & added kans are the easiest type of kan, but they require you to open your hand. Since there is no [[yaku]] for a kan until the third kan, committing to an open kan is risky.
+*Calling four kans immediately reveals you have a yakuman hand, so players are likely to defend.
+*The hand always has a hadaka tanki wait.
-* Another player developing and winning with a faster and easier hand.  This may be the case for any hand.
+Finally, like any other yakuman, another player could have a faster hand and win before you.
-* The winning tile is made unavailable, which again may be the case for any hand.
-* The player had avoided calling kan(s), in order to deny any additional dora.
-* The player has called [[pon]] on a tile type, but the fourth tile was not available - either discarded earlier, drawn by another player, or in the dead wall.
-* The added kan to a previously called pon may be subject to [[chankan]].
-* Another player has called kan.  This prevents one player from calling kan four times.
-* Hadaka tanki may create a perilous situation, where the last remaining tile and drawn tile are both dangerous tiles.
 ==Value==
@@ Line 49: / Line 49: @@
 ==External links==
 {{jpwiki|四槓子}}
 [[Category:Yakuman]]
 {{Navbox yaku}}