Defense: Difference between revisions

Defense (view source)

Revision as of 03:07, 21 June 2024

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-Defense in [[Japanese mahjong]] means to '''avoiding dealing into other players' hands by not discarding winning tiles'''. Defense is an important skill, especially when other players call [[riichi]] and/or have a high scoring hand. All else equal, a player with a lower "[[ron|deal in rate]]" will have a higher chance of winning the game.
+Defense in [[Japanese mahjong]] means to '''avoid dealing into other players' hands by not discarding winning tiles'''. Defense is an important skill, especially when other players call [[riichi]] and/or have a high scoring hand. All else equal, a player with a lower "[[ron|deal in rate]]" will have a higher chance of winning the game.
 == General overview ==
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 ===Honors===
-[[Honor]] tiles, especially those which have been discarded before, are generally safer. This is because the honor tiles cannot form [[shuntsu|sequences]], meaning they are harder to wait off of.
+[[Honor]] tiles with multiple copies visible are generally safer. This is because the honor tiles cannot form [[shuntsu|sequences]], meaning they are harder to wait off of.
 *Honor tiles you can see all four copies of are safe against everything except [[kokushi musou]]. If kokushi isn't possible (e.g. all four copies of a ''different'' honor/terminal are also visible), then these honors are 100% safe.
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 {{main|Suji}}
-'''Suji''' focuses on taking advantage of the furiten rule, and its application to the "mahjong intervals". Most two-sided or better waits will wait on tiles that are 3 numbers apart. E.g. a {23} wait wins off either a 1 or 4 (4-3=1). Therefore, if a tile is safe, the tiles that are 3 apart from that tile are safer - the intervals of 3 are called "suji intervals". For instance, if a player has discarded 4-pin, the 1-pin and 7-pin become safer against that player. Neither 1 or 7 is perfectly safe, however.
+'''Suji''' focuses on taking advantage of the furiten rule and the most common type of wait.
-It is ''very'' important to note that the middle tiles (4, 5, 6) require two tiles to be considered true suji. A discarded 1-pin by itself does not make 4-pin much safer, since the hand could contain a 4-7 wait. In order for 4-pin to be "full" suji, both 1-pin and 7-pin must be safe.
+A [[ryanmen]] wait, a two-sided wait to complete a sequence (e.g. {23} waiting for 1 or 4), is the most common wait in the game, appearing in ~50% of all hands. A ryanmen always waits on tiles that are 3 numbers apart, such as 1-4 or 4-7.
+Therefore, when a tile is safe, the other tiles that are 3 apart become safer. For instance, if a player has discarded 4-pin, the 1-pin and 7-pin become safer against that player. Neither 1 or 7 is perfectly safe, however. These intervals of 3 are called "suji intervals".
+It is important to note that the middle tiles (4, 5, 6) require two tiles to be considered true suji. The 4 is part of two suji intervals: 1-4 and 4-7. If a 1 is discarded, a player could still have a 4-7 open wait. The 4 is only full suji if ''both'' 1 and 7 are safe.
 Some suji are safer than others: