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 Post subject: Throwing In
Post #1 Posted: Wed Mar 08, 2017 6:03 am 
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Can someone explain how to tell where I should throw in/when to throw in? I hear players talk about it all the time, and I always have a hard time understanding when I should go for it in my games.

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 Post subject: Re: Throwing In
Post #2 Posted: Wed Mar 08, 2017 6:40 am 
Tengen

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Throw in to
- eliminate an eye if thereby the group is then not alive,
- connect the throw-in string if it wins the capturing race,
- accelerate reduction of approach liberties in a capturing race,
- create a liberty shortage,
- connect strings making them strong (thick),
- prepare a squeeze,
- prepare a semedori,
- threaten to do some of the above if the opponent's reply cannot defend against all threats because of multiple threats or ko,
- etc.

EDIT


Last edited by RobertJasiek on Wed Mar 08, 2017 6:43 am, edited 1 time in total.
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 Post subject: Re: Throwing In
Post #3 Posted: Wed Mar 08, 2017 6:43 am 
Tengen

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Well, what are you trying to do? A throw-in is often used to make a false eye, so if there's a group you are killing and you read the throw-in kills it then play it. Or they can be used to reduce liberties (e.g. on first line), so if you read the throw-in reduces their liberties and lets you capture some stones you want to capture then do it. A snapback is another example of a throw-in tactic taking away liberties and often come up as a tesuji to capture some cutting stones. I wouldn't approach a game as "today I will make 5 throw-ins", but if you post a game of yours for review I can probably find some opportunities for throw-ins as they are a fairly common technique.

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 Post subject: Re: Throwing In
Post #4 Posted: Wed Mar 08, 2017 6:46 am 
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TofuPython wrote:
Can someone explain how to tell where I should throw in/when to throw in? I hear players talk about it all the time, and I always have a hard time understanding when I should go for it in my games.


Most good tsumego series for beginners will drill you on the throw-in technique by covering many, many typical situations. If you want to develop your intuition for it I would recommend the Level Up & Jump Level Up! series.

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 Post subject: Re: Throwing In
Post #5 Posted: Wed Mar 08, 2017 8:18 am 
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The sequence to kill the J group is a good example of using a throw-in to eliminate eye space. In the second diagram in the following webpage, move 7 is the throw-in.

Site: http://senseis.xmp.net/?JGroup

Here are a few other examples of throw-ins: http://senseis.xmp.net/?ThrowIn

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 Post subject: Re: Throwing In
Post #6 Posted: Wed Mar 08, 2017 8:41 am 
Gosei
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Basically, it's sacrificing a stone inside your opponent's group to try and either kill it (usually), or make profit out of it that's greater than the sacrifice value.

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 Post subject: Re: Throwing In
Post #7 Posted: Wed Mar 08, 2017 10:30 am 
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Throwing in happens in joseki, too. Here's a familiar one:

Click Here To Show Diagram Code
[go]$$B joseki beginning
$$ ------------------
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . 4 . . . . . .
$$ | . . 1 , 2 5 . . .
$$ | . . . . 3 . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]


Click Here To Show Diagram Code
[go]$$W joseki continuation
$$ ------------------
$$ | . . . . . . . . .
$$ | . . . . 6 . . . .
$$ | . 5 O 8 . . . . .
$$ | 9 4 X 1 O X . . .
$$ | . 7 3 2 X . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]


WHite 10 throws in to the left of W1 in the second diagram to set up a squeeze.

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 Post subject: Re: Throwing In
Post #8 Posted: Wed Mar 08, 2017 12:27 pm 
Judan

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Here is an example of the throw-in to take away a potential eye and kill a group.

Click Here To Show Diagram Code
[go]$$B Black to play and kill
$$ -------------------------------
$$ . . . . O . X X . O B 1 2 . . .
$$ . . . X O O . O O O O O X . . .
$$ . . X . X O O X O X . X . . . .
$$ . . . . X X X X X X . . X . . .
$$ . . . . . . . . . . . . . . . .
$$ . . . . . . . . . . . . . . . .[/go]


White threatens to capture the :bc: stone and make a second eye. After :w2: :b3: at1 takes away that eye.

Here is a throw-in to reduce liberties and capture stones.

Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . .
$$ | . . X X . . . .
$$ | . X O 4 5 . . .
$$ | . X O 1 O . . .
$$ | . X O 2 3 . . .
$$ | . . X X . . . .
$$ | . . . . . . . .[/go]


One to remember, called the Cranes’ Nest. :)

Edit: Also, here is a throw-in in a strange corner sequence.



White has horrible shape. ;)

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