Defense: Difference between revisions

Defense (view source)

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 Kabe is a tactic similar to suji. If all four copies of a tile are visible, then it is impossible to have a ryanmen wait on certain tiles nearby.
-For example, if you can see all four copies of 3-pin, then 1-pin and 2-pin cannot possibly be part of a ryanmen wait. This is because no opponent can possibly have a 23 or 34 shape, because no opponent can have a 3 in the first place. Tiles inside a kabe, such as 4-pin or 5-pin in this case, are not much safer, similar to how half suji are not much safer.
+For example, if you can see all four copies of 3-pin, then 1-pin and 2-pin cannot possibly be part of a ryanmen wait. This is because no opponent can possibly have a 23 or 34 shape, because no opponent can have a 3 in the first place. Tiles towards the middle, such as 4-pin or 5-pin in this case, are not much safer, similar to how half suji are not much safer.
 Like suji, other waits are still possible. Kabe is comparable to suji (though kabe is safer), and should be used in a similar fashion.