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Riichi strategy: Difference between revisions
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** A riichi hand can no longer defend. If other players manage to reach tenpai, you could deal in. | ** A riichi hand can no longer defend. If other players manage to reach tenpai, you could deal in. | ||
* Riichi usually lowers the hand's win rate. A defending player is less likely to deal in, so you'll be less likely to win. | * Riichi usually lowers the hand's win rate. A defending player is less likely to deal in, so you'll be less likely to win. | ||
* If you do not declare a win on the first possible winning tile, you will enter [[furiten]]. Entering furiten is usually ill-advised, so players may have to accept a [[yasume]] (lower scoring tile). | * If you do not declare a win on the first possible winning tile, you will enter [[furiten]]. | ||
** Entering furiten is usually ill-advised, so players may have to accept a [[yasume]] (lower scoring tile). | |||
** A riichi call prevents you from [[targeting]] a specific player to ron off of. | ** A riichi call prevents you from [[targeting]] a specific player to ron off of. | ||
* A "riichi stick" of 1,000 points is spent to call the riichi, with the hopes of winning it back. However, other players may win the hand and capture those 1,000 points instead. | * A "riichi stick" of 1,000 points is spent to call the riichi, with the hopes of winning it back. However, other players may win the hand and capture those 1,000 points instead. | ||
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Since most of the risks of riichi only apply if the hand fails to win, having a good wait means that riichi is more desirable. Bad shape waits may be more pressured to keep the possibility of failure in mind, as well as the possibility of changing the hand into having a better wait. | Since most of the risks of riichi only apply if the hand fails to win, having a good wait means that riichi is more desirable. Bad shape waits may be more pressured to keep the possibility of failure in mind, as well as the possibility of changing the hand into having a better wait. | ||
If you are in [[furiten]], you should be more wary about riichi. A furiten riichi with a 3-sided wait or better is typically ok. A furiten two-sided wait may work if it's early in the game. | If you are in [[furiten]], you should be more wary about declaring riichi. A furiten riichi with a 3-sided wait or better is typically ok. A furiten two-sided wait may work if it's early in the game. | ||
=== Score === | === Score === | ||
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When the game is closer to its end (generally around the second half, but may be earlier if particularly large wins and losses have been going on), point standing becomes more of a concern. If the game could end on the next round, gaining +1000 points to go from 3rd to 2nd becomes much more valuable. At this stage, players who are ahead may not want to riichi, as the risks are amplified, among other considerations. | When the game is closer to its end (generally around the second half, but may be earlier if particularly large wins and losses have been going on), point standing becomes more of a concern. If the game could end on the next round, gaining +1000 points to go from 3rd to 2nd becomes much more valuable. At this stage, players who are ahead may not want to riichi, as the risks are amplified, among other considerations. | ||
In other words: in the earlier end of the game, going for raw points | In other words: in the earlier end of the game, going for raw points can be a good idea. In the later end, aiming to retain (or improve) your placement usually matters more than the points themselves. This consideration will depend on the game's [[oka and uma]] settings. | ||
=== Point standing === | === Point standing === | ||
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=== Winning chance === | === Winning chance === | ||
Pressing players to defend will lower your chance of winning. Assuming a | Pressing players to defend will lower your chance of winning. Assuming a damaten hand has a yaku (i.e. it can ron), declaring riichi will generally lower your winrate by about 40%. Therefore, if winning matters and the extra score does not matter you should dama. Also, with valuable hands (mangan/haneman or above), dama is usually better. | ||
Hands which have an extremely poor wait (e.g single tile wait on dora) are so bad that riichi doesn't reduce their chance of winning by much. | Hands which have an extremely poor wait (e.g single tile wait on dora) are so bad that riichi doesn't reduce their chance of winning by much. | ||