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Riichi strategy: Difference between revisions
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=== Winning chance === | === Winning chance === | ||
Pressing players to defend will lower your chance of winning. If a hand has a yaku other than riichi, declaring riichi will generally lower your winrate by about 40%. Since riichi more-than-doubles your score until reaching mangan, riichi generally has the better expected value. | Pressing players to defend will lower your chance of winning. If a hand has a yaku other than riichi, declaring riichi will generally lower your winrate by about 40%. Since riichi more-than-doubles your score until reaching mangan (1 han from riichi doubles score, then extra han from ippatsu/uradora), riichi generally has the better expected value. | ||
If you don't care about points, but you do care about winning, you should dama. As mentioned above, if you are in the lead by a large amount, dama. | If you don't care about points, but you do care about winning, you should dama. As mentioned above, if you are in the lead by a large amount, dama. | ||
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*Players that are ahead should be more willing to dama. Late in the game, increasing your point lead doesn't matter as much, but the risk of dealing in matters more. Also, as mentioned above, dama increases your winrate, allowing you to end the game faster. | *Players that are ahead should be more willing to dama. Late in the game, increasing your point lead doesn't matter as much, but the risk of dealing in matters more. Also, as mentioned above, dama increases your winrate, allowing you to end the game faster. | ||
*Meanwhile, players in 4th by a large amount are often forced to riichi, hoping for a big hand. Players in the middle should analyze their own specific situations to determine if riichi is right. If being in 4th place confers a huge penalty (as in | *Meanwhile, players in 4th by a large amount are often forced to riichi, hoping for a big hand. Players in the middle should analyze their own specific situations to determine if riichi is right. If being in 4th place confers a huge penalty (such as high ranked gameplay in [[tenhou.net]]/[[Majsoul]]), players not in 4th may want to dama to end the game faster, even if riichi could let you rise up a rank. | ||
*The 1000 points used to declare riichi could cause you to drop down a rank. If this is the case during all last, you probably shouldn't riichi if you have another yaku. | *The 1000 points used to declare riichi could cause you to drop down a rank. If this is the case during all last, you probably shouldn't riichi if you have another yaku. | ||
*If a damaten win and riichi win would cause you to end up in the same placement, and it's all last, you should dama. | *If a damaten win and riichi win would cause you to end up in the same placement, and it's all last, you should dama. | ||
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== Oikake riichi == | == Oikake riichi == | ||
'''Oikake riichi''' {{kana|追いかけリーチ}} is a "chasing riichi", or a declared riichi after another player had already declared riichi. | '''Oikake riichi''' {{kana|追いかけリーチ}} is a "chasing riichi", or a declared riichi after another player had already declared riichi. In this state, two or even three players have simultaneously declared riichi. In this state, players are locked into a "riichi duel" - any riichi declarer is liable of playing into another's riichi call. | ||
Players often declare chasing riichi because they have no option to defend, or when they have a big hand. At the same time, if after an opponent riichi's, you reach a good wait tenpai, then trying to win is often better than folding. When you do have the option to defend, the decision to push or fold should depend more on [[shanten]], [[ukeire|tile acceptance]], and wait rather than the value of the hand. | |||
The process of four active riichi hands is not possible due to [[Tochuu ryuukyoku|suucha riichi]], or four called riichi. In this case, the hand ends if the fourth riichi discard is not a winning tile for any of the previous three. | The process of four active riichi hands is not possible due to [[Tochuu ryuukyoku|suucha riichi]], or four called riichi. In this case, the hand ends if the fourth riichi discard is not a winning tile for any of the previous three. | ||