Is this a tesuji? Does it have a name?

[luigi]

I just played a sequence analog to the following in a 9x9 game:

$$ Black splits White
$$ . . O . X . O . .
$$ . . O . X . O . .
$$ . . O . X . O . .
$$ . . O X X X O . .
$$ . . O 2 5 4 O . .
$$ . . . 1 O 3 . . .
$$ . . . 7 6 . . . .
$$ ----------------

Click Here To Show Diagram Code

[go]$$ Black splits White
$$ . . O . X . O . .
$$ . . O . X . O . .
$$ . . O . X . O . .
$$ . . O X X X O . .
$$ . . O 2 5 4 O . .
$$ . . . 1 O 3 . . .
$$ . . . 7 6 . . . .
$$ ----------------[/go]

Is this a tesuji? Does it have a name?

[DrStraw]

It is certainly a well-known tesuji but I never seen that it has a name.

[gowan]

It is known as the "two stone edge squeeze" or "stone tower" tesuji. See this Sensei's Library page for more information: http://senseis.xmp.net/?TwoStoneEdgeSqueeze

[Uberdude]

It is known as the "two stone edge squeeze" or "stone tower" tesuji. See this Sensei's Library page for more information: http://senseis.xmp.net/?TwoStoneEdgeSqueeze

Although that was also my thought at a cursory glance, it's not what is shown. It is simply what I would describe as cutting a double knight's move on the 3rd to 2nd line. Here are the key stones from which I expect a ~15 kyu or stronger to realise it is cut.

$$ Black splits White
$$ . . . . . . . . .
$$ . . . . . . . . .
$$ . . . . . . . . .
$$ . . . X X X . . .
$$ . . O . . . O . .
$$ . . . 1 O . . . .
$$ . . . . . . . . .
$$ ----------------

Click Here To Show Diagram Code

[go]$$ Black splits White
$$ . . . . . . . . .
$$ . . . . . . . . .
$$ . . . . . . . . .
$$ . . . X X X . . .
$$ . . O . . . O . .
$$ . . . 1 O . . . .
$$ . . . . . . . . .
$$ ----------------[/go]

[Bill Spight]

I just played a sequence analog to the following in a 9x9 game:

$$ Black splits White
$$ . . O . X . O . .
$$ . . O . X . O . .
$$ . . O . X . O . .
$$ . . O X X X O . .
$$ . . O 2 5 4 O . .
$$ . . . 1 O 3 . . .
$$ . . . 7 6 . . . .
$$ ----------------

Click Here To Show Diagram Code

[go]$$ Black splits White
$$ . . O . X . O . .
$$ . . O . X . O . .
$$ . . O . X . O . .
$$ . . O X X X O . .
$$ . . O 2 5 4 O . .
$$ . . . 1 O 3 . . .
$$ . . . 7 6 . . . .
$$ ----------------[/go]

Is this a tesuji? Does it have a name?

is a jump attachment. is a clamp. - capture White in a ladder.

The whole operation may be called a scissors. That term is not in common use in English, but I saw it (in Japanese, OC) in an old copy of the problem classic, Gokyo Shumyo. (See http://senseis.xmp.net/?GokyoShumyo )

Congratulations on seeing it!

[luigi]

I just played a sequence analog to the following in a 9x9 game:

$$ Black splits White
$$ . . O . X . O . .
$$ . . O . X . O . .
$$ . . O . X . O . .
$$ . . O X X X O . .
$$ . . O 2 5 4 O . .
$$ . . . 1 O 3 . . .
$$ . . . 7 6 . . . .
$$ ----------------

Click Here To Show Diagram Code

[go]$$ Black splits White
$$ . . O . X . O . .
$$ . . O . X . O . .
$$ . . O . X . O . .
$$ . . O X X X O . .
$$ . . O 2 5 4 O . .
$$ . . . 1 O 3 . . .
$$ . . . 7 6 . . . .
$$ ----------------[/go]

Is this a tesuji? Does it have a name?

is a jump attachment. is a clamp. - capture White in a ladder.

The whole operation may be called a scissors. That term is not in common use in English, but I saw it (in Japanese, OC) in an old copy of the problem classic, Gokyo Shumyo. (See http://senseis.xmp.net/?GokyoShumyo )

Congratulations on seeing it!

Thanks.