|                In this full(=14 tile) hand case, I may take one of the following 2 tactics; according to the number of unseen pais I need. | 組合龍と全不靠、そのどちらかの一向聴を選択することができる。 どちらにするかは、待ち牌の残り枚数と相談して決めるであろう。 | 
det := 1/4*n*((2*w1+w2)*p1 - 40*D) - 7*dd.
I will take tactics a(suite serpentin) or b(petit serpentin) according as it is potisitve or negative respectively.
parameters:
p := points/2 + 8; 15 or 15.5 for suite serpentin(=p1), 20 for grand serpentin and 14 for petit serpentin.
n := #unseen( ), w1,w2 := #unseen(
), w1,w2 := #unseen( ,
, ); assuming #unseen(
); assuming #unseen( )>=#unseen(
)>=#unseen( )>=#unseen(
)>=#unseen( ) without loss of generarity, w :=2*w1+w2, d1, d2, d3 := #unseen(
) without loss of generarity, w :=2*w1+w2, d1, d2, d3 := #unseen( ,
, ,
, ). D := d1+d2+d3. dd=d1*d2+d2*d3+d3*d1.
). D := d1+d2+d3. dd=d1*d2+d2*d3+d3*d1.
| (1) if n=0 or w=0, then I do't take the tactics a. (2) if D=0, then I don't take the tactics b. | 
 
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| (3) if D>=4, then I take the tactics b. If D>=4, then 2*m1+m2<=9. Thus det < 9*p1 - 160 < 0. (4) If m1=1 and m2=0, then det<0. So I take the tactics b. (5) If dd=0, then I take the tactics a. | 
 
 
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| (6) When m1>=m2>=1, I choose a or b as the following table. 
 (6.4) In case D=2 and w=7, det>0 except when n=1 and dd=1. | 以下 (1)  (2)  (3)  (4)  | ||||||||||||||||||||||||||||||||||||||
| (7) In case D=2 and w=6; 
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 (1)  (2)    | ||||||||||||||||||||||||||||||||||||||
| (8) In case D=3 and w=9; 
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 (1)  (2)    | ||||||||||||||||||||||||||||||||||||||