Shanten: Difference between revisions

Shanten (view source)

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 *Every hand starts at 8-shanten.
-*"Group shanten" factor: Each complete group reduces shanten by 2. Each taatsu/pair in hand reduces shanten by 1.
+*Each complete group reduces shanten by 2. Each taatsu/pair in hand reduces shanten by 1.
-**However, once a hand has 4 blocks, any blocks past the 4th no longer count towards group shanten. This is because mahjong hands require exactly 4 tile groups.
+**However, once a hand has 4 blocks, any blocks past the 4th no longer count towards this. This is because mahjong hands require exactly 4 tile groups.
-*"Pair shanten" factor: When the hand has at least 5 blocks, having at least one pair will reduce shanten by 1.
+*When the hand has one pair (''in addition to 4 other blocks''), shanten is reduced by 1
 For example, a hand with 6 taatsu and a lone tile is not (8-6=) 2-shanten; it is instead (8-4=) 4-shanten. A hand with 5 taatsu + 1 pair would be (8-4-1=) 3-shanten.