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[[Image:Damaten.png|250px|right|thumb|Damaten applied to a standalone baiman hand. [http://tenhou.net/0/?log=2014070418gm-0089-0000-092c00f3&tw=2]]] | [[Image:Damaten.png|250px|right|thumb|Damaten applied to a standalone baiman hand. [http://tenhou.net/0/?log=2014070418gm-0089-0000-092c00f3&tw=2]]] | ||
'''Damaten''' {{kana|黙聴}}, or '''dama''' for short, | '''Damaten''' {{kana|黙聴}} ("hidden tenpai"), or '''dama''' for short, refers to a closed [[tenpai]] hand that has not called [[riichi]]. Typically, a dama hand will have a [[yaku]] without needing to riichi; otherwise, [[menzen tsumo]] (or another circumstantial yaku) would be needed to win. An older term '''yamiten''' {{kana|闇聴}} refers to the same thing. | ||
==Usage== | ==Usage== | ||
{{Main|Riichi strategy}} | {{Main|Riichi strategy}} | ||
There are many reasons to dama. In most cases, it occurs when the extra points from riichi do not matter: | There are many reasons to dama. In most cases, it occurs when the extra points from riichi do not matter: | ||
*When the call for riichi | *When the call for riichi would not increase the hand's value by itself. For example, a [[haneman]] is scored with a 6-7 han hand. If a player had a 6 han hand, the +1 han from riichi would not increase the score. While declaring riichi could still with a tsumo, ippatsu, and/or ura dora, these aren't reliable,. | ||
*When the hand is valuable. Because players will often [[defense|defend]] against a riichi hand, declaring riichi will usually lower your hand's win rate. With a guaranteed [[mangan]] or higher, the increased win rate from dama may outweigh riichi's score bonus. Plus, once mangan is reached, each han afterwards has reduced value. | *When the hand is valuable. Because players will often [[defense|defend]] against a riichi hand, declaring riichi will usually lower your hand's win rate. With a guaranteed [[mangan]] or higher, the increased win rate from dama may outweigh riichi's score bonus. Plus, once mangan is reached, each han afterwards has reduced value. | ||
*When winning at all is the only thing that matters. When far in the lead, dama can be used to increase win rate (thus, ending the game faster). If the game is in [[oorasu|all last]], and winning with riichi wouldn't improve placement (even with ippatsu ron), dama can also be considered. | *When winning at all is the only thing that matters. When far in the lead, dama can be used to increase win rate (thus, ending the game faster). If the game is in [[oorasu|all last]], and winning with riichi wouldn't improve placement (even with ippatsu ron), dama can also be considered. | ||
*When the hand can improve. Riichi locks | *When the hand can improve. Riichi locks the hand in, preventing you from upgrading the wait or gaining yaku. If your hand has many upgrades, you may wish to dama. | ||
*When the hand is poor. If a hand would be riichi-only with a bad wait, committing to riichi may not be worthwhile. Staying dama gives a chance to tsumo and gives the option to [[fold]] if another player reaches tenpai. | *When the hand is poor. If a hand would be riichi-only with a bad wait, committing to riichi may not be worthwhile. Staying dama gives a chance to tsumo and gives the option to [[fold]] if another player reaches tenpai. | ||
That being said, dama should not be overused. Riichi is a guaranteed +1 han, and on average provides +1.5 han. Since each han | That being said, dama should not be overused. Riichi is a guaranteed +1 han, and on average provides +1.5 han. Since each han until mangan will roughly doubles score, riichi offers a large score boost. See [[riichi strategy]] for more details on the decision to riichi or dama. | ||
==Game examples== | ==Game examples== | ||
Latest revision as of 23:46, 1 September 2024
Damaten 「黙聴」 ("hidden tenpai"), or dama for short, refers to a closed tenpai hand that has not called riichi. Typically, a dama hand will have a yaku without needing to riichi; otherwise, menzen tsumo (or another circumstantial yaku) would be needed to win. An older term yamiten 「闇聴」 refers to the same thing.
Usage
Main article: Riichi strategy
There are many reasons to dama. In most cases, it occurs when the extra points from riichi do not matter:
- When the call for riichi would not increase the hand's value by itself. For example, a haneman is scored with a 6-7 han hand. If a player had a 6 han hand, the +1 han from riichi would not increase the score. While declaring riichi could still with a tsumo, ippatsu, and/or ura dora, these aren't reliable,.
- When the hand is valuable. Because players will often defend against a riichi hand, declaring riichi will usually lower your hand's win rate. With a guaranteed mangan or higher, the increased win rate from dama may outweigh riichi's score bonus. Plus, once mangan is reached, each han afterwards has reduced value.
- When winning at all is the only thing that matters. When far in the lead, dama can be used to increase win rate (thus, ending the game faster). If the game is in all last, and winning with riichi wouldn't improve placement (even with ippatsu ron), dama can also be considered.
- When the hand can improve. Riichi locks the hand in, preventing you from upgrading the wait or gaining yaku. If your hand has many upgrades, you may wish to dama.
- When the hand is poor. If a hand would be riichi-only with a bad wait, committing to riichi may not be worthwhile. Staying dama gives a chance to tsumo and gives the option to fold if another player reaches tenpai.
That being said, dama should not be overused. Riichi is a guaranteed +1 han, and on average provides +1.5 han. Since each han until mangan will roughly doubles score, riichi offers a large score boost. See riichi strategy for more details on the decision to riichi or dama.
Game examples
- Damaten in Japanese Wikipedia
- Multiple instances where damaten was employed.
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