\section{虎口切断常虚跳\quad{}双单形见定靠单}
\setcounter{tuxxx}{2}%图编号从3开始
{\heiti 题解}：这是两个有联系但内容不同的要诀。``虎口切断''并不是指从对方虎口内切断，而是象图一那样，在断处下方有一虎口，这时就需要象白1那样虚跳。\par
``双单形见定靠单''，象图二那样，白子一方为两个子，一方为一个子，这样的形，称为``双单''。《弈理指归续编》中《凡遇要处总诀》的``双单形见定靠单，乃令粘重''就是指黑1这样的形。\par
\begin{psgopartialboard*}{(1,1)(10,7)}
	%1
	\stone{black}{b}{3}
	\stone{black}{b}{4}	
	\stone{black}{c}{3}
	\stone{black}{c}{6}
	\stone{black}{d}{3}
	\stone{black}{e}{2}
	\stone{black}{f}{3}
	\stone{black}{f}{4}
	\stone{black}{g}{2}
	\stone{black}{g}{5}
	
	\stone{white}{b}{5}
	\stone{white}{c}{4}
	\stone{white}{c}{5}
	\stone{white}{d}{4}
	\stone{white}{e}{3}
	\stone{white}{e}{4}
	\stone{white}{e}{5}
	\stone{white}{f}{5}
	\stone{white}{g}{4}

	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{j}{4}%1

\end{psgopartialboard*}\par
\begin{psgopartialboard*}{(1,1)(10,7)}
	%2
	\stone{black}{b}{3}
	\stone{black}{b}{4}	
	\stone{black}{c}{3}
	\stone{black}{c}{6}
	\stone{black}{d}{3}
	\stone{black}{e}{2}
	\stone{black}{f}{2}
	\stone{black}{f}{3}
	\stone{black}{f}{4}
	\stone{black}{g}{2}
	\stone{black}{g}{5}
	\stone{black}{g}{6}
	
	\stone{white}{b}{5}
	\stone{white}{c}{4}
	\stone{white}{c}{5}
	\stone{white}{d}{4}
	\stone{white}{e}{3}
	\stone{white}{e}{4}
	\stone{white}{e}{5}
	\stone{white}{f}{5}
	\stone{white}{g}{3}
	\stone{white}{g}{4}
	\stone{white}{j}{4}
	\stone{white}{j}{6}
	
	\setcounter{gomove}{0}%步数编号从1开始
	\move{j}{3}%1

\end{psgopartialboard*}\par
这两条都是讲棋形和子力的，前者为了避免愚形，后者是使对方成为凝形。\par
\begin{psgopartialboard*}{(1,1)(10,7)}
	%3
	\markpos{A}{g}{3}

	\stone{black}{b}{3}
	\stone{black}{b}{4}	
	\stone{black}{c}{3}
	\stone{black}{c}{6}
	\stone{black}{d}{3}
	\stone{black}{e}{2}
	\stone{black}{f}{3}
	\stone{black}{f}{4}
	\stone{black}{g}{2}
	\stone{black}{g}{5}
	
	\stone{white}{b}{5}
	\stone{white}{c}{4}
	\stone{white}{c}{5}
	\stone{white}{d}{4}
	\stone{white}{e}{3}
	\stone{white}{e}{4}
	\stone{white}{e}{5}
	\stone{white}{f}{5}
	\stone{white}{g}{4}

	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{h}{4}%1
	\move{g}{6}%2

\end{psgopartialboard*}\par
\tx （长）：白1长，忽视了下方是虎口这一特点，黑2长后，由于将来A位打成愚形，因此白只能放弃这步打的权利，徒受损。\par
\begin{psgopartialboard*}{(1,1)(10,7)}
	%4
	\stone{black}{b}{3}
	\stone{black}{b}{4}	
	\stone{black}{c}{3}
	\stone{black}{c}{6}
	\stone{black}{d}{3}
	\stone{black}{e}{2}
	\stone{black}{f}{3}
	\stone{black}{f}{4}
	\stone{black}{g}{2}
	\stone{black}{g}{5}
	
	\stone{white}{b}{5}
	\stone{white}{c}{4}
	\stone{white}{c}{5}
	\stone{white}{d}{4}
	\stone{white}{e}{3}
	\stone{white}{e}{4}
	\stone{white}{e}{5}
	\stone{white}{f}{5}
	\stone{white}{g}{4}

	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{j}{4}%1
	\move{h}{4}%2
	\move{h}{5}%3
	\move{g}{3}%4
	\move{g}{6}%5

\end{psgopartialboard*}\par
\tx （滚打）：白1虚跳，这步棋初学者往往不敢走，原因是怕被黑2打吃掉一子，其实白有3位滚打的手段，取得了成功。所以说``滚打''是``虚跳''的保障。\par
\begin{psgopartialboard*}{(1,1)(10,9)}
	%5
	\markpos{A}{j}{3}

	\stone{black}{b}{3}
	\stone{black}{b}{4}	
	\stone{black}{c}{3}
	\stone{black}{c}{6}
	\stone{black}{d}{3}
	\stone{black}{e}{2}
	\stone{black}{f}{3}
	\stone{black}{f}{4}
	\stone{black}{g}{2}
	\stone{black}{g}{5}
	
	\stone{white}{b}{5}
	\stone{white}{c}{4}
	\stone{white}{c}{5}
	\stone{white}{d}{4}
	\stone{white}{e}{3}
	\stone{white}{e}{4}
	\stone{white}{e}{5}
	\stone{white}{f}{5}
	\stone{white}{g}{4}

	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{j}{4}%1
	\move{g}{6}%2
	\move{g}{3}%3
	\move{f}{2}%4
	\move{j}{6}%5

\end{psgopartialboard*}\par
\tx （对比）：现在白1按要诀虚跳，黑2长，白3打，白子力发挥得较好。白5视局势亦可在A补。以图五和图三对比，得失自明。\par
\begin{psgopartialboard*}{(1,1)(11,8)}
	%6
	\markpos{A}{g}{6}

	\stone{black}{b}{3}
	\stone{black}{b}{4}	
	\stone{black}{c}{3}
	\stone{black}{c}{6}
	\stone{black}{d}{3}
	\stone{black}{e}{2}
	\stone{black}{f}{3}
	\stone{black}{f}{4}
	\stone{black}{g}{2}
	\stone{black}{g}{5}
	
	\stone{white}{b}{5}
	\stone{white}{c}{4}
	\stone{white}{c}{5}
	\stone{white}{d}{4}
	\stone{white}{e}{3}
	\stone{white}{e}{4}
	\stone{white}{e}{5}
	\stone{white}{f}{5}
	\stone{white}{g}{4}

	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{g}{3}%1
	\move{f}{2}%2
	\move{j}{4}%3
	\move{j}{3}%4

\end{psgopartialboard*}\par
\tx （俗）：初学者总怕不保险，喜欢先在1位打，再在3位跳，但这样下是俗手。这时黑方下法较多，不一定在A位长了，例如直接4位靠，就相当有力，这就是``双单形见定靠单''。\par
\begin{psgopartialboard*}{(1,1)(11,8)}
	%7
	\stone{black}{b}{3}
	\stone{black}{b}{4}	
	\stone{black}{c}{3}
	\stone{black}{c}{6}
	\stone{black}{d}{3}
	\stone{black}{e}{2}
	\stone{black}{f}{2}
	\stone{black}{f}{3}
	\stone{black}{f}{4}
	\stone{black}{g}{2}
	\stone{black}{g}{5}
	\stone{black}{g}{6}
	
	\stone{white}{b}{5}
	\stone{white}{c}{4}
	\stone{white}{c}{5}
	\stone{white}{d}{4}
	\stone{white}{e}{3}
	\stone{white}{e}{4}
	\stone{white}{e}{5}
	\stone{white}{f}{5}
	\stone{white}{g}{3}
	\stone{white}{g}{4}
	\stone{white}{j}{4}
	\stone{white}{j}{6}
	
	\setcounter{gomove}{0}%步数编号从1开始
	\move{h}{2}%1
	\move{j}{3}%2

\end{psgopartialboard*}\par
\tx （乏力）：再回复到图二，黑不靠而长，白2双补，白得好形。\par
\begin{psgopartialboard*}{(1,1)(11,7)}
	%8
	\stone{black}{b}{3}
	\stone{black}{b}{4}	
	\stone{black}{c}{3}
	\stone{black}{c}{6}
	\stone{black}{d}{3}
	\stone{black}{e}{2}
	\stone{black}{f}{2}
	\stone{black}{f}{3}
	\stone{black}{f}{4}
	\stone{black}{g}{2}
	\stone{black}{g}{5}
	\stone{black}{g}{6}
	
	\stone{white}{b}{5}
	\stone{white}{c}{4}
	\stone{white}{c}{5}
	\stone{white}{d}{4}
	\stone{white}{e}{3}
	\stone{white}{e}{4}
	\stone{white}{e}{5}
	\stone{white}{f}{5}
	\stone{white}{g}{3}
	\stone{white}{g}{4}
	\stone{white}{j}{4}
	\stone{white}{j}{6}
	
	\setcounter{gomove}{0}%步数编号从1开始
	\move{h}{5}%1
	\move{k}{3}%2
	\move{j}{5}%3
	\move{k}{5}%4
	\move{k}{6}%5
	\move{l}{6}%6
	\move{k}{7}%7
	\move{l}{5}%8

\end{psgopartialboard*}\par
\tx （大恶）：黑1企图冲断，自己先走愚形，是不可取的。到白8后，完全是帮白方走棋，黑方大恶。\par
这两个图都不能和靠单的正着相比。靠单的目的是``乃令粘重''，即破坏对方棋形。虎口切断常虚跳，``虚跳''这步棋用途是比较广的。\par
\begin{psgopartialboard*}{(1,1)(8,12)}
	%9
	\markpos{A}{c}{8}

	\stone{black}{c}{4}
	\stone{black}{c}{7}	
	\stone{black}{d}{7}
	\stone{black}{e}{8}
	\stone{black}{h}{4}

	\stone{white}{d}{8}
	\stone{white}{e}{3}
	\stone{white}{e}{6}
	\stone{white}{e}{7}

\end{psgopartialboard*}\par
\tx （习题）：这是二间高夹最常见的型，黑方切断之后轮白走，应当怎样下？\par
\begin{psgopartialboard*}{(1,1)(8,12)}
	%10
	\stone{black}{c}{4}
	\stone{black}{c}{7}	
	\stone{black}{d}{7}
	\stone{black}{e}{8}
	\stone{black}{h}{4}
	
	\stone{white}{d}{8}
	\stone{white}{e}{3}
	\stone{white}{e}{6}
	\stone{white}{e}{7}
	
	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{c}{8}%1
	\move{b}{7}%2
	\move{d}{10}%3
	\move{e}{9}%4
	\move{d}{11}%5
	\move{g}{7}%6

\end{psgopartialboard*}\par
\tx （俗手）：白1先挡是俗手，黑2立后黑角较净了。白3如跳先定形，黑4就长，窥白弱点，白5还得委曲再补。右方黑可以先下手了，比如在6位封就是好点，这样白处于下风。\par
\begin{psgopartialboard*}{(1,1)(8,10)}
	%11
	\markpos{A}{c}{8}
	\markpos{B}{b}{7}

	\stone{black}{c}{4}
	\stone{black}{c}{7}	
	\stone{black}{d}{7}
	\stone{black}{e}{8}
	\stone{black}{h}{4}
	
	\stone{white}{d}{8}
	\stone{white}{e}{3}
	\stone{white}{e}{6}
	\stone{white}{e}{7}
	
	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{d}{10}%1
	\move{e}{9}%2
	\move{d}{9}%3

\end{psgopartialboard*}\par
\tx （相反）：白1单跳，在这个型中仍是要点。这时黑2长反而是俗手了，白3粘后，由于未作A、B两手交换，黑角较弱，中间黑两子气又撞紧了，这样攻守逆转，白有利。\par
其中黑2于3位打吃一子，白可在2位包打，黑中套。\par
\begin{psgopartialboard*}{(1,1)(8,10)}
	%12
	\stone{black}{c}{4}
	\stone{black}{c}{7}	
	\stone{black}{d}{7}
	\stone{black}{e}{8}
	\stone{black}{h}{4}
	
	\stone{white}{d}{8}
	\stone{white}{e}{3}
	\stone{white}{e}{6}
	\stone{white}{e}{7}
	
	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{d}{10}%1
	\move{f}{8}%2
	\move{c}{8}%3
	\move{d}{5}%4
	\move{e}{5}%5
	\move{d}{2}%6
	\move{g}{7}%7

\end{psgopartialboard*}\par
\tx （定式）：白1跳时，黑2向中间长是正着，这时白3再挡次序好。黑4、6补角，白7跳出，这是定式，两不吃亏。\par
这里可以看到``虚跳''的好处。用它的条件是：一、可如图四滚打；二、3位挡是先手。\par
\begin{psgopartialboard*}{(1,1)(8,11)}
	%13
	\stone{black}{c}{4}
	\stone{black}{c}{7}	
	\stone{black}{d}{7}
	\stone{black}{e}{8}
	\stone{black}{h}{4}
	
	\stone{white}{d}{8}
	\stone{white}{e}{3}
	\stone{white}{e}{6}
	\stone{white}{e}{7}
	
	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{d}{9}%1
	\move{f}{8}%2
	\move{g}{6}%3
	\move{e}{11}%4
	\move{c}{5}%5

\end{psgopartialboard*}\par
\tx （特殊）：白1长是本型的一种特殊下法，读者在谱上如见到，请不要以为这是常法。\par
白1伏有5靠的手段而成立，如果遇到黑角稍坚固的棋形时，这样长就显得笨重了。所以白1长，不如虚跳那样带有普遍性。\par
\begin{psgopartialboard*}{(1,1)(19,9)}
	%14
	\markpos{A}{j}{7}
	
	\stone{black}{c}{4}
	\stone{black}{e}{3}	
	\stone{black}{h}{6}
	\stone{black}{k}{5}
	\stone{black}{k}{6}
	\stone{black}{l}{3}
	\stone{black}{l}{4}
	\stone{black}{m}{3}
	\stone{black}{n}{2}
	\stone{black}{n}{3}	
	\stone{black}{o}{2}
	\stone{black}{p}{3}
	\stone{black}{q}{2}
	\stone{black}{q}{3}
	
	\stone{white}{k}{7}
	\stone{white}{l}{5}
	\stone{white}{l}{6}
	\stone{white}{l}{8}
	\stone{white}{m}{4}
	\stone{white}{n}{4}
	\stone{white}{o}{3}
	\stone{white}{o}{4}
	\stone{white}{p}{2}
	\stone{white}{p}{4}
	\stone{white}{r}{3}
	\stone{white}{r}{5}

\end{psgopartialboard*}\par
\tx （习题）：这是常见定式，黑本当A补，但未补。轮白走，要点在哪里？\par
\begin{psgopartialboard*}{(1,1)(13,8)}
	%15
	\markpos{A}{g}{5}
	\markpos{B}{h}{5}

	\stone{black}{c}{4}
	\stone{black}{e}{3}	
	\stone{black}{h}{6}
	\stone{black}{k}{5}
	\stone{black}{k}{6}
	\stone{black}{l}{3}
	\stone{black}{l}{4}
	\stone{black}{m}{3}
	\stone{black}{n}{2}
	\stone{black}{n}{3}	
	\stone{black}{o}{2}
	\stone{black}{p}{3}
	\stone{black}{q}{2}
	\stone{black}{q}{3}
	
	\stone{white}{k}{7}
	\stone{white}{l}{5}
	\stone{white}{l}{6}
	\stone{white}{l}{8}
	\stone{white}{m}{4}
	\stone{white}{n}{4}
	\stone{white}{o}{3}
	\stone{white}{o}{4}
	\stone{white}{p}{2}
	\stone{white}{p}{4}
	\stone{white}{r}{3}
	\stone{white}{r}{5}

	\stone[\marktr]{white}{l}{8}

	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{j}{7}%1
	\move{g}{6}%2

\end{psgopartialboard*}\par
\tx （不得法）：白1长，不得要领。白已有\stone[\marktr]{white}之子，中腹已强，白1作用不大，被黑2（或A、B）补，下方成空。白方吃亏。\par
\begin{psgopartialboard*}{(1,1)(13,8)}
	%16
	\markpos{A}{f}{7}
	
	\stone{black}{c}{4}
	\stone{black}{e}{3}	
	\stone{black}{h}{6}
	\stone{black}{k}{5}
	\stone{black}{k}{6}
	\stone{black}{l}{3}
	\stone{black}{l}{4}
	\stone{black}{m}{3}
	\stone{black}{n}{2}
	\stone{black}{n}{3}	
	\stone{black}{o}{2}
	\stone{black}{p}{3}
	\stone{black}{q}{2}
	\stone{black}{q}{3}
	
	\stone{white}{k}{7}
	\stone{white}{l}{5}
	\stone{white}{l}{6}
	\stone{white}{l}{8}
	\stone{white}{m}{4}
	\stone{white}{n}{4}
	\stone{white}{o}{3}
	\stone{white}{o}{4}
	\stone{white}{p}{2}
	\stone{white}{p}{4}
	\stone{white}{r}{3}
	\stone{white}{r}{5}

	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{h}{5}%1
	\move{j}{6}%2
	\move{g}{6}%3
	\move{g}{5}%4
	\move{f}{5}%5
	\move{g}{4}%6
	\move{g}{7}%7

\end{psgopartialboard*}\par
\tx （靠单）：白1靠单是要点。黑2粘，白3扳，走到7,白利用弃子，将黑封锁，白有利。其中黑4如不断而在7位扳，白可A位连扳。本图为``乃令粘重''之例，``粘重''并不意味着可大吃，只要使对方行动稍受牵制就算达到目的。``粘重''，其本身子力即不充分。\par
\begin{psgopartialboard*}{(1,1)(9,7)}
	%17
	\stone{black}{b}{3}
	\stone{black}{b}{4}	
	\stone{black}{c}{3}
	\stone{black}{c}{6}
	\stone{black}{d}{3}
	\stone{black}{e}{2}
	\stone{black}{f}{2}
	\stone{black}{f}{3}
	\stone{black}{f}{4}
	\stone{black}{g}{5}	

	\stone{white}{b}{5}
	\stone{white}{c}{4}
	\stone{white}{c}{5}
	\stone{white}{d}{4}
	\stone{white}{e}{3}
	\stone{white}{e}{4}
	\stone{white}{e}{5}
	\stone{white}{f}{5}
	\stone{white}{g}{4}

	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{j}{4}%1
	\move{g}{6}%2
	\move{g}{3}%3

\end{psgopartialboard*}\par
\tx （细察）：本图切断处下方不是虎口，白1虚跳失去意义。白3空落后手，因此白3不是先手时不宜跳。\par
\begin{psgopartialboard*}{(1,1)(12,7)}
	%18	
	\stone{black}{b}{2}
	\stone{black}{c}{2}	
	\stone{black}{c}{4}
	\stone{black}{c}{5}
	\stone{black}{d}{2}
	\stone{black}{d}{3}
	\stone{black}{e}{2}
	\stone{black}{e}{3}
	\stone{black}{f}{4}
	\stone{black}{g}{3}	
	\stone{black}{g}{4}
	\stone{black}{g}{6}

	\stone{white}{b}{3}
	\stone{white}{c}{3}
	\stone{white}{d}{4}
	\stone{white}{d}{6}
	\stone{white}{e}{1}
	\stone{white}{e}{4}
	\stone{white}{f}{2}
	\stone{white}{f}{3}
	\stone{white}{g}{2}
	\stone{white}{h}{3}
	\stone{white}{h}{4}

	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{f}{6}%1
	\move{h}{5}%2
	\move{k}{4}%3
	\move{j}{5}%4
	\move{m}{3}%5
	\move{f}{7}%6

\end{psgopartialboard*}\par
\tx （特殊）：白1``靠单''，如图到黑6扳，白反而穷屈。原因何在呢？因为白不走1位靠，黑也要走2、4的，那么，白就可以另选好点了。白1``靠单''不仅没有起到``乃令粘重''的作用，而且自塞了变化。\par
\begin{psgopartialboard*}{(1,1)(12,9)}
	%19
	\stone{black}{b}{2}
	\stone{black}{c}{2}	
	\stone{black}{c}{4}
	\stone{black}{c}{5}
	\stone{black}{d}{2}
	\stone{black}{d}{3}
	\stone{black}{e}{2}
	\stone{black}{e}{3}
	\stone{black}{f}{4}
	\stone{black}{g}{3}	
	\stone{black}{g}{4}
	\stone{black}{g}{6}
	
	\stone{white}{b}{3}
	\stone{white}{c}{3}
	\stone{white}{d}{4}
	\stone{white}{d}{6}
	\stone{white}{e}{1}
	\stone{white}{e}{4}
	\stone{white}{f}{2}
	\stone{white}{f}{3}
	\stone{white}{g}{2}
	\stone{white}{h}{3}
	\stone{white}{h}{4}

	\setcounter{gomove}{0}%步数编号从1开始
	\pass*
	\move{d}{5}%1
	\move{h}{5}%2
	\move{k}{4}%3
	\move{j}{5}%4
	\move{m}{3}%5
	\move{d}{9}%6
	\move{c}{6}%7
	\move{b}{4}%8
	\move{b}{5}%9
	\move{a}{3}%10
	\move{e}{8}%11

\end{psgopartialboard*}\par
\tx （常法）：白1粘是常法，黑走2、4，白可得7、9之利。从本图可以看出，有时局部的要点在全局却并非要点。\par
\clearpage