Prior to actually reading where stones might be placed, lets see if we can establish where we generally want them to be. Black has a 3-5 stone, a 4-4 stone, and a 4-6 stone. The latter two are high stones; the first is a bit high and a bit low. When 2-1/2 stones of a 3-stone group are high, we know that it should be looking at going toward the center.
So even before white's latest stone is played, we know that black wants a stone somewhere in the shaded area:
- Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O X . . . . |
$$ | . . . , . . . . . O . . . O . X . . . |
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$$ | . . . . . . . . . . . . ? ? ? X . . . |
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$$ | . . . . . . . . . . . . . ? ? ? . . . |
$$ | . . . . . . . . . . . . . . ? ? . . . |
$$ | . . . , . . . . . , . . . . ? ? X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
When white plays his latest, its shock waves compress the area to this:
- Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O X . . . . |
$$ | . . . , . . . . . O . . . O . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . ? ? ? X . . . |
$$ | . . . . . . . . . . . . . ? ? W . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . . X . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------
$$ { AR Q10 Q12 }
$$ { LN R13 T10 }
$$ { LN P13 N10 }[/go]
From there, it is just a matter of reading to decide which of the shaded spots black should play in.
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Also, a little theory about contact moves, from the point of view of the person who plays them: there is a proverb that says "attach to strong stones, not weak stones". The logic behind this is that, when you attach to a stone, your opponent will probably defend, thereby making it stronger. It is obviously a bad idea to encourage your opponent to make a weak stone stronger, but often there is little lost in encouraging him to make a strong stone stronger. It can result in over-concentration of strength.
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If we combine the two ideas mentioned above, we can see that white's move is a deflecting play. He wants to disrupt your normal flow, and divert it westward. In doing so he hopes to isolate your R10 stone. It costs him very little to do so because he is attaching to a strong stone.
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BTW, lets do a little archeological explorataion. The only reason that he can do a diverting play successfully is because a move to the west, such as P14 or O14, does not harm him. His stones on the upper side are strong.
- Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O X . . . . |
$$ | . . . , . . . . . O . . . O . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X X X . . . |
$$ | . . . . . . . . . . . . . . . W . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . . X . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------
$$ { AR N11 N15 }
$$ { LN K16 O16 }[/go]
Lets weaken white a little by removing a two stones, 1 white, 1 black - marked with shading - and see how it looks:
- Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O ? . . . . |
$$ | . . . , . . . . . O . a . ? . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . B . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . . X . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Now the circled black stone is threatening something like 'a'.
It he is already too strong to be easily threatened, this suggests that the real source of your problem is a move or two back.
As a general rule, when white makes the low 1-space approach to a black star point stone, and there are no other stones nearby, kicking is a bad idea. Usually, black needs a stone in the shaded areas for it to be practical.
- Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . ? ? ? ? . 1 2 . . . . |
$$ | . . . , . . . . ? ? ? ? . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . ? ? ? . . |
$$ | . . . . . . . . . . . . . . ? ? ? . . |
$$ | . . . . . . . . . . . . . . . . . . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
For details, see my post on when to kick:
http://lifein19x19.com/forum/viewtopic. ... 322#p36322-----------------------------------------------
In summary, a theoretical description of what is happening is this: You kicked prematurely, leading him to quickly form a strong group up top. He then deflects your group in that direction, knowing that there is little downside in doing so. Having defected your group impotently westward, he will then try to isolate and attack your R10 stone.
If you don't kick at the wrong time, he can't do this.