Renchan: Difference between revisions

Latest revision as of 18:59, 18 November 2024

When a renchan 「連荘」, or dealer repeat, occurs, a new hand is started, but the wind seating does not rotate. Therefore, for each renchan, the game is extended by 1 hand. In addition, a honba is added, slightly increasing the value of the next win.

A renchan occurs when the dealer wins. In many rulesets, they also occur when the dealer retains tenpai when no one wins the hand. They also occur after an abortive draw.

Renchan are a major part of the game's strategy. Dealers get more points for winning, so the dealer is encouraged to renchan to keep their position (each renchan is +1 hand where they are dealer). In addition, the extra hands can allow players more chances to comeback from a losing situation.

Strategy

The dealer is encouraged to win a bit more quickly in order to trigger renchan. Note, however, that the value of renchan is not very big. In an average situation, the expected value of a renchan is around 500 (as a lowball estimate) to 750 points.^[1] This is quite small, so in normal situations, you shouldn't change your play by a lot just for an extra renchan.

When nearing all last, renchan can be a lot more valuable. A player who is very far behind is hard-pressed to win many renchan in order to climb back up. Conversely, when late in the game, a player with a big lead may deliberately avoid a renchan to end the game faster (giving other players less chances to make a comeback).

If tenpai renchan is used, then dealers have a greater incentive to remain tenpai by exhaustive draw. This may result in riskier play than usual, since the dealer has more at stake than the other players.

Rule variations

Main article: Scoring variations#Renchan

Practically every ruleset allows renchan after a dealer win. Other than that, the rules can vary:

Agari renchan: Renchan only occurs after a dealer win.
Tenpai renchan: Renchan occurs after a dealer win, or if the dealer is tenpai at exhaustive draw.
Ryuukyoku renchan: Renchan occurs after a dealer win or any exhaustive draw (even if dealer is not tenpai). This is mainly used in rulesets when the East round is tenpai renchan, and South round is ryuukyoku renchan.

In addition, if abortive draws are used, an abortive draw always triggers a renchan.

Some rulesets may have different renchan rules depending on whether it is East round or South round. In these rules, renchans are usually harder in East round, and easier in the South round.

All last

Outside of all last, renchan is usually mandatory when possible.

During all last, there are a few main variations:

A 1st-place dealer must end the game once they win in all last. Non-1st place dealers must renchan if they win. This is the rule used in most online clients.
A dealer must start a new renchan if they win in all last, even if in 1st place.
A dealer, regardless of place, can choose to end the round once they win in all last.

What qualifies as winning

If multiple ron is enabled:

Some rules only allow renchan if the dealer is the first player in turn order after the player who dealt in (similar to how atamahane works).
Some rules allow the dealer to renchan so long as they win, regardless of seat order.

If nagashi mangan is used:

If nagashi mangan is treated as a win, then the dealer renchans when scoring nagashi mangan.
If nagashi mangan is treated as a point exchange, then the dealer renchans as if nagashi mangan did not exist. This means if the dealer scores nagashi mangan but is not tenpai, no renchan occurs. If a non-dealer scores nagashi mangan, but the dealer is tenpai, a renchan does occur (assuming tenpai renchan is used).

External links

↑ Gō, Kobayashi. Super Digital Mahjong. Translation: https://natsuai.com/mahjong/digital/chapter-2-3

[1] Gō, Kobayashi. Super Digital Mahjong. Translation: https://natsuai.com/mahjong/digital/chapter-2-3

[1]

@@ Line 1: / Line 1: @@
-'''Renchan''' {{kana|連荘}} functions as the '''dealer repeat'''.  When renchan occurs, the wind seating does not rotate.  Consequently, the [[jikaze|winds]] do not rotate. The [[kyoku|hand]] is played again with the same [[oya|dealer]].  Additionally, a [[honba]] is added, slightly increasing the value of the next hand.  This rule is invoked when either the dealer wins the hand or the dealer retains [[tenpai]] when [[Ryuukyoku|no one wins the hand]].
+When a '''renchan''' {{kana|連荘}}, or '''dealer repeat''', occurs, a new [[kyoku|hand]] is started, but the [[jikaze|wind seating]] does not rotate. Therefore, for each renchan, the game is extended by 1 hand. In addition, a [[honba]] is added, slightly increasing the value of the next win.
-Renchan factor significantly into game strategy: because the dealer scores more points for winning, it is generally preferred to have as many hands as dealer as possible. While the exact conditions for renchan [[scoring variations#renchan|vary by ruleset]], in general, a renchan is a bonus given to a dealer who does well.
+A renchan occurs when the [[dealer]] wins. In many rulesets, they also occur when the dealer retains [[tenpai]] when [[Ryuukyoku|no one wins the hand]]. They also occur after an [[abortive draw]].
-Renchan are not the only situations where a honba can be added, nor the only situations where the hand can be repeated with the same dealer. Honba are also added if the deal rotates without a player winning, and the hand can be repeated with the same dealer in event of a [[chombo]]. If a chombo occurs, however, no honba are added.
+Renchan are a major part of the game's strategy. Dealers get more points for winning, so the dealer is encouraged to renchan to keep their position (each renchan is +1 hand where they are dealer). In addition, the extra hands can allow players more chances to [[gyakuten|comeback]] from a losing situation.
-== Conditions ==
+== Strategy ==
+The dealer is encouraged to win a bit more quickly in order to trigger renchan. Note, however, that the value of renchan is not very big. In an average situation, the expected value of a renchan is around 500 (as a lowball estimate) to 750 points.<ref>Gō, Kobayashi. ''Super Digital Mahjong''. Translation: https://natsuai.com/mahjong/digital/chapter-2-3</ref> This is quite small, so in normal situations, you shouldn't change your play by a lot just for an extra renchan.
-Under all rulesets, renchan occurs any time the dealer wins a hand. Under rulesets which allow [[tochuu ryuukyoku|abortive draws]], renchan occurs every time an abortive draw occurs.
-Beyond these commonalities, the conditions for renchan can vary from ruleset to ruleset. In some rulesets, they can vary depending on the [[ba|wind round]] of the game. If this is the case, then renchan is usually more difficult in the east round, and more commmon during the south round.
-=== Agari renchan ===
+When nearing [[oorasu|all last]], renchan can be a lot more valuable. A player who is very far behind is hard-pressed to win many renchan in order to climb back up. Conversely, when late in the game, a player with a big lead may deliberately avoid a renchan to end the game faster (giving other players less chances to make a comeback).
-The most restrictive form of renchan rules is '''agari renchan''' (win renchan), under which there are no other conditions for renchan. In particular, renchan never occurs at [[ryuukyoku|an exhaustive draw]].
+If tenpai renchan is used, then dealers have a greater incentive to remain tenpai by exhaustive draw. This may result in riskier play than usual, since the dealer has more at stake than the other players.
-=== Tenpai renchan ===
+== Rule variations ==
+{{Main|Scoring variations#Renchan}}
-The most common form of renchan is '''tenpai renchan''', under which a renchan also occurs at an exhaustive draw if the dealer declares a [[tenpai]] hand.
+Practically every ruleset allows renchan after a dealer win. Other than that, the rules can vary:
-=== Ryuukyoku renchan ===
+*'''Agari renchan''': Renchan only occurs after a dealer win.
+*'''Tenpai renchan''': Renchan occurs after a dealer win, or if the dealer is tenpai at exhaustive draw.
+*'''Ryuukyoku renchan''': Renchan occurs after a dealer win or any exhaustive draw (even if dealer is not tenpai). This is mainly used in rulesets when the East round is tenpai renchan, and South round is ryuukyoku renchan.
-The most permissive form of renchan is '''ryuukyoku renchan''', under which a renchan also occurs at any exhaustive draw, regardless of players' tenpai status. Usually, this variation is only found in the south round where the east round is played with tenpai renchan.
+In addition, if [[abortive draw]]s are used, an abortive draw always triggers a renchan.
-=== Minor variations ===
+Some rulesets may have different renchan rules depending on whether it is East round or South round. In these rules, renchans are usually harder in East round, and easier in the South round.
-If [[multiple ron]] is permitted, there may be a variation to the rule that the dealer always get a renchan after winning the hand. Under some rulesets, if a multiple ron occurs and the dealer is one of the winners, a renchan occurs in a multiple ron only if the dealer is the first player in turn order after the player who dealt in, similar to how [[atamahane]] awards the win only to the first player in turn order.
-If [[nagashi mangan]] is used, then its interaction with renchan depends on how it is scored. Under some rulesets, nagashi mangan is scored as a winning hand, in which case renchan occurs if the dealer was the player to complete it. Under other rulesets, nagashi mangan is treated as a replacement for the usual points exchange at an exhaustive draw, in which case the renchan occurs based on the usual rules for an exhaustive draw. This may allow the dealer to complete and score nagashi mangan but, because they are not [[tenpai]], to lose the deal.
-== Strategy ==
-In general, the dealer wants to win repeatedly and quickly in order to trigger renchan. The dealer receives a score bonus for winning, and while taking slower, bigger hands may be enticing, it is better to save that for large hands ([[mangan]] or better) in order to minimize the risk of someone else winning and the deal rotating.
+=== All last ===
+Outside of [[all last]], renchan is usually mandatory when possible.
-Every time the dealer wins a hand, they receive a renchan. This means that they will receive the points for winning the hand, and then the hand will repeat with the same dealer. The points exchange means that the game is no closer to its conclusion, but the dealer now has more points, putting them into a better situation. If the dealer wins repeatedly, these points can add up, and the points for the honba will also add up.
+During all last, there are a few main variations:
+* A 1st-place dealer must end the game once they win in all last. Non-1st place dealers must renchan if they win. This is the rule used in most online clients.
+* A dealer must start a new renchan if they win in all last, even if in 1st place.
+* A dealer, regardless of place, can choose to end the round once they win in all last.
-If tenpai renchan is the rule in effect, then as a hand nears an exhaustive draw, the dealer is encouraged to remain tenpai in order to claim a renchan. This may result in riskier play than usual, since the dealer has more at stake than the other players.
+=== What qualifies as winning ===
+If [[multiple ron]] is enabled:
+* Some rules only allow renchan if the dealer is the first player in turn order after the player who dealt in (similar to how [[atamahane]] works).
+* Some rules allow the dealer to renchan so long as they win, regardless of seat order.
-Near the end of the game, the strategy regarding renchan can change. A player who is very far behind is hard-pressed to win many renchan in order to climb back up and possibly surpass other players' scores, while a player in first wants the game to end as quickly as possible. Nearing the end, a dealer with a sizeable lead may deliberately avoid a renchan (especially if [[agariyame]] is not being used) in order to avoid the risk of a large tsumo, and to hasten the end of the game.
+If [[nagashi mangan]] is used:
+* If nagashi mangan is treated as a win, then the dealer renchans when scoring nagashi mangan.
+* If nagashi mangan is treated as a point exchange, then the dealer renchans as if nagashi mangan did not exist. This means if the dealer scores nagashi mangan but is not tenpai, no renchan occurs. If a non-dealer scores nagashi mangan, but the dealer is tenpai, a renchan does occur (assuming tenpai renchan is used).
 == External links==
+{{References}}
 [[Category:Game rules]]
 [[Category:Terminology]]
 {{Navbox strategy}}