Score table memorization: Difference between revisions

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===Fu===
===Fu===
{{Main|Fu}}
{{Main|Fu}}
Fu starts at 20 fu. It is then determined by:
All hands start with a base of 20 fu. Then, a hand may increase fu by:
*Having [[triplet]]s and/or [[kan]] calls
*Having a [[kanchan]], [[penchan]], or [[tanki]] wait
*Having a pair of [[yakuhai]].
*Winning by [[tsumo]] or closed hand [[ron]].


*The type and number of [[triplet]]s and [[kan]] calls.
(See the [[fu]] article for exact details).
**Each triplet is worth a base of 4 fu, half if an [[naki|open]] triplet, double if a [[terminal]] or [[honor]] tile.
**Each kan is worth a base of 16 fu, half if an open kan, double if a terminal or honor tile.
**Note: a win by [[ron]] opens the triplet, reducing the fu count.
*The [[Machi|wait]] of the hand. [[Tanki]], [[kanchan]], and [[penchan]] waits are worth +2 fu. The others are worth +0 fu.
*If the hand has a [[yakuhai]] pair. A pair of yakuhai ([[dragon]]s, round wind, seat wind) are worth +2 fu. A pair of a wind that is both round + seat wind is often worth +4 fu, but some rules score it as +2 fu.
*Method of winning. Tsumo is +2 fu unless [[pinfu]]. A closed hand ron is +10 fu. Open hand ron is 0 fu.
*Special cases: [[Chiitoitsu]] is always set to 25 fu. An open hand with 20 fu is bumped up to 30 fu.


Finally, fu is rounded up to the next interval of 10 fu, unless it is chiitoitsu. This rounding makes it easier to memorize the hand values.
After calculating fu, the fu count is rounded up to the next interval of 10 fu, unless it is chiitoitsu. For example, a hand with 32 fu is rounded to 40 fu. This rounding makes it easier to memorize the hand values.


== Common Fu Values ==
== Common Fu Values ==
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*30 fu - Most open hands; most closed hand tsumo; pinfu ron
*30 fu - Most open hands; most closed hand tsumo; pinfu ron
*40 fu - Closed hand ron; most open [[toitoi]]
*40 fu - Most closed hand ron; most open [[toitoi]]
*20 fu - Pinfu + tsumo
*20 fu - Pinfu + tsumo
*25 fu - Chiitoitsu
*25 fu - Chiitoitsu
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Therefore, you can multiply fu by 2, then subtract 1 han, and end up with the same score value. You can also add 1 han, then divide fu by 2, and end up with the same score. This means by memorizing the 30 fu values, you will also memorize the 60 fu values. By memorizing the 25 fu values, you will also memorize the 50 fu values.
Therefore, you can multiply fu by 2, then subtract 1 han, and end up with the same score value. You can also add 1 han, then divide fu by 2, and end up with the same score. This means by memorizing the 30 fu values, you will also memorize the 60 fu values. By memorizing the 25 fu values, you will also memorize the 50 fu values.


By proxy, this means that when a hand gains +1 han with the same fu, it roughly doubles in point value. Due to rounding, a hand may not ''exactly'' double in value, but it is often very close to double.
By proxy, this means that when a hand gains +1 han (without changing fu), it roughly doubles in point value. Due to rounding, a hand may not ''exactly'' double in value, but it is often very close to double.
 
==Memorizing common values==
Due to the size of the scoring table, it is important to know the most common values first. Knowing the (1-4 han) + (20, 25, 30, 40) fu hands, as well as mangan+ hands, are the most important.


=== Mangan and more ===
=== Mangan and more ===
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|colspan=6| † ''Dealer tsumo applies to all non-dealer players''
|colspan=6| † ''Dealer tsumo applies to all non-dealer players''
|}
|}
==Memorizing common values==
Due to the size of the scoring table, it is important to know the most common values first. Other than the mangan+ hands, knowing the (1-4 han) + (20, 25, 30, 40) fu hands are the more important.


===30 and 40 fu===
===30 and 40 fu===
30 and 40 fu are the most common point values, so it is logical to start here. The smallest possible hand is 1 han 30 fu from ron, which is worth 1000 points.
30 and 40 fu are the most common point values. The smallest possible hand is 1 han 30 fu from ron, which is worth 1000 points.


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==Equivalent point values==
==Equivalent point values==
As mentioned above, adding one han is equivalent to doubling the hand's fu. This rule makes it easier memorize, say, 20 fu, if you already know the 40 fu values.
As mentioned above, adding one han is equivalent to doubling the hand's fu. This rule makes it easier to memorize, say, 20 fu, if you already know the 40 fu values.


===20 fu and 40 fu===
===20 fu and 40 fu===
Only hands with [[pinfu]] + [[menzen tsumo]] can score 20 fu. Pinfu with ron is worth 30 fu (+10 from closed ron). From the 40 fu values, you can add 1 han and divide fu by 2 to reach the 20 fu values. Therefore, you can memorize the 20 fu values by memorizing the 40 fu values.
Only hands with [[pinfu]] + [[menzen tsumo]] can score 20 fu. Pinfu with ron is worth 30 fu (+10 from closed ron). All other hands cannot reach this amount.
 
If you know the 40 fu values, you can add 1 han and divide fu by 2 to get the associated 20 fu value. Because pinfu + tsumo is at least 2 han, there is no 1 han 20 fu amount needed to worry about.


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