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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 (1 han from riichi doubles score, then extra han from ippatsu/uradora), riichi generally has | 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 potential extra han from ippatsu/uradora), when you are below mangan, riichi will generally has a higher 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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In the first half of the game, your exact point standing (the # of points between you and 1st/2nd/3rd/4th place) is generally not a big concern. There are many opportunities to make up differences : a player who's ahead can hardly afford to rest on their laurels, while players who are behind are not as desperate. Thus, situations tend to be more "general" - riichi's increased reward is usually appreciated, its intimidation effect more often felt, and it is more often a good idea. | In the first half of the game, your exact point standing (the # of points between you and 1st/2nd/3rd/4th place) is generally not a big concern. There are many opportunities to make up differences : a player who's ahead can hardly afford to rest on their laurels, while players who are behind are not as desperate. Thus, situations tend to be more "general" - riichi's increased reward is usually appreciated, its intimidation effect more often felt, and it is more often a good idea. | ||
When the game is closer to its end (usually in the South round; can be earlier if a player is close to bankrupting), the game's precise point standing matters more. Most | When the game is closer to its end (usually in the South round; can be earlier if a player is close to bankrupting), the game's precise point standing matters more. Most places focus heavily on the player's end-of-game placement, so going from 3rd to 2nd is a major jump, and going from 3rd to 4th is a major blow. Even a +1000 point win is valuable if it causes you to rise in placement, or lets you keep your current placement. | ||
*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 (such as high ranked gameplay in [[tenhou.net]] | *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]] and [[Majsoul]]), players not in 4th may want to dama to end the game faster, even if riichi could let them rise a place. | ||
*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. | ||