Defense: Difference between revisions

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 **Note: Full suji is when both suji interval tiles are safe. Half suji is when only one suji interval tile is safe. So a 1 being safe makes 4 half suji; both 1 and 7 being safe makes 4 full suji.
-Using suji on the riichi declaration tile is more dangerous than normal. This is because of the ryankan shape (e.g. 135, 246, or 357). Ryankans are often kept as they can improve [[tile efficiency]]. But if the hand reaches tenpai with a ryankan intact, then it must discard one of the tiles. In this case, a player can discard the 5 and wait on the suji tile 2.
+Using suji on the riichi declaration tile is more dangerous than normal. This is because of the ryankan shape (e.g. 135, 246, or 357). Ryankans are often kept as they can improve [[tile efficiency]]. If the hand reaches tenpai with a ryankan intact, then one of its tiles must be discarded. This creates a suji trap. For example, with a ryankan of 135, a player can discard the 5 and wait on the suji tile 2.
 In addition, opponents may intentionally take advantage of this strategy by setting up suji traps, like discarding a 6 and waiting on the 9. Players may also declare riichi on a one-sided wait or a [[shanpon]] wait, where suji would be useless. Relying only in suji to defend will result in many play-ins. Therefore, suji should be used when genbutsu tiles have ran out, or in Uchi-mawashi.