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'''Riichi''' {{kana|立直}} or {{kana|リーチ}} is the most common [[List of yaku|yaku]] in the game | '''Riichi''' {{kana|立直}} or {{kana|リーチ}} is the most common [[List of yaku|yaku]] in the game. Any closed hand that reaches [[tenpai]] can declare "riichi", gaining this yaku. It occurs in ≥40% of winning hands across various platforms and professional settings. | ||
Declaring riichi is not mandatory. Players may decline to declare riichi, keeping the hand's tenpai status hidden - this is a tactic known as [[damaten]]. Various game scenarios should be considered before calling riichi, such as current point standing and available tiles. | Declaring riichi is not mandatory. Players may decline to declare riichi, keeping the hand's tenpai status hidden - this is a tactic known as [[damaten]]. Various game scenarios should be considered before calling riichi, such as current point standing and available tiles. | ||
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===Noten riichi=== | ===Noten riichi=== | ||
In real life play, a player may declare riichi without tenpai - this would be a '''noten riichi''' {{kana|ノーテンリーチ}}, which is highly ill-advised. If the hand results in [[ryuukyoku]], then it is required to reveal the hand. The hand would naturally show noten, which is illegal, and thus subject to a [[chombo]] penalty. Likewise, an incorrectly called win would also be subject to chombo. This dubious situation can be escaped if another player wins, another player commits a chombo, or if an [[abortive draw]] occurs. Of course, most | In real life play, a player may declare riichi without tenpai - this would be a '''noten riichi''' {{kana|ノーテンリーチ}}, which is highly ill-advised. If the hand results in [[ryuukyoku]], then it is required to reveal the hand. The hand would naturally show noten, which is illegal, and thus subject to a [[chombo]] penalty. Likewise, an incorrectly called win would also be subject to chombo. This dubious situation can be escaped if another player wins, another player commits a chombo, or if an [[abortive draw]] occurs. Of course, most mahjong software will prevent players from declaring a riichi without tenpai. | ||
== Scoring == | == Scoring == | ||