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Kabe: Difference between revisions
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Kabe works on tiles towards the outside, up to +/- 2 away from the all-visible tile. E.g., if all four 4-pin are visible, 2-pin and 3-pin are safer but 1-pin is not. | Kabe works on tiles towards the outside, up to +/- 2 away from the all-visible tile. E.g., if all four 4-pin are visible, 2-pin and 3-pin are safer but 1-pin is not. | ||
Kabe can be combined with other kabe or [[suji]] to eliminate [[ryanmen]] waits. For example, with all four 3-sou and 7-sou visible, 5-sou is safer. Similarly, if all four 4-pin are visible and an opponent discards 9-pin, the 6-pin is safer against that opponent (45-pin in hand impossible due to kabe, 78-pin in hand would be [[furiten]] due to 9 discard). | Kabe can be combined with other kabe or [[suji]] to eliminate [[ryanmen]] waits. For example, with all four 3-sou and 7-sou visible, 5-sou is safer. Similarly, if all four 4-pin are visible and an opponent discards 9-pin, the 6-pin is safer against that opponent. (There are two possible ryanmen waits for 6-pin: 45-pin and 78-pin. A 45-pin in hand is impossible due to kabe, while a 78-pin in hand would be [[furiten]] due to the 9 discard). | ||
=== One chance === | === One chance === | ||
'''One chance''' occurs when three copies of a tile are visible. The concept works like no chance: when three copies are visible, then it is less likely (but still possible) for an opponent to have the fourth copy hidden in their hand. For example, if you can see three copies of 3-pin, then 1-pin and 2-pin are less likely to be an opponent's winning tile. | '''One chance''' occurs when three copies of a tile are visible. The concept works like no chance: when three copies are visible, then it is less likely (but still possible) for an opponent to have the fourth copy hidden in their hand. For example, if you can see three copies of 3-pin, then 1-pin and 2-pin are less likely to be an opponent's winning tile. | ||
A one chance tile is less safe than no chance, but still safer than a regular tile. However, | A one chance tile is less safe than no chance, but still safer than a regular tile in the early- to mid- game. However, it is no longer safe in the late-game because it's not unlikely that the opponent has the last copy of that tile. | ||
=== Double one chance === | === Double one chance === | ||
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=== Safety === | === Safety === | ||
No chance is as safe or safer than [[suji]], since no chance prevents [[ryanmen]] and [[kanchan]] waits, while a suji tile is only immune against ryanmen waits. In addition, kabe applies to all players, while suji only works on specific players. However, since kabe is relatively rare, both defensive techniques should be | No chance is as safe or safer than [[suji]], since no chance prevents [[ryanmen]] and [[kanchan]] waits, while a suji tile is only immune against ryanmen waits. In addition, kabe applies to all players, while suji only works on specific players. However, since kabe is relatively rare, both defensive techniques should be considered. | ||
One chance tiles are less safe than suji. One chance becomes | One chance tiles are less safe than suji. One chance becomes dangerous in the late game, since it becomes likely for an opponent to have the last copy of a tile. | ||
Like suji, kabe implies that an opponent has a ryanmen (or kanchan) wait. So if an opponent is going for a hand like [[toitoi]] or [[chiitoitsu]], the usual rules of kabe don't apply. Instead, if you are certain an opponent | Like suji, kabe implies that an opponent has a ryanmen (or kanchan) wait. So if an opponent is going for a hand like [[toitoi]] or [[chiitoitsu]], the usual rules of kabe don't apply. Instead, if you are certain an opponent has a pair/triplet wait, like if they have a [[hadaka tanki]], rely on tiles that have all 4 copies visible. | ||
== Tile Efficiency == | == Tile Efficiency == | ||