corner problem after Joseki

[LR24]

$$c first 10 joseki moves
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . 0 . . . . .
$$ | . 8 4 . . 3 . . . .
$$ | . 6 5 1 . . . . . ,
$$ | . 7 9 . . . . . . .
$$ | . . 2 . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .

Click Here To Show Diagram Code

[go]$$c first 10 joseki moves
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . 0 . . . . .
$$ | . 8 4 . . 3 . . . .
$$ | . 6 5 1 . . . . . ,
$$ | . 7 9 . . . . . . .
$$ | . . 2 . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .[/go]

$$c joseki continuation
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . O 1 . . . .
$$ | . O O 4 2 X . . . .
$$ | . O X X 3 . . . . ,
$$ | . X X . . . 5 . . .
$$ | . . O . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .

Click Here To Show Diagram Code

[go]$$c joseki continuation
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . O 1 . . . .
$$ | . O O 4 2 X . . . .
$$ | . O X X 3 . . . . ,
$$ | . X X . . . 5 . . .
$$ | . . O . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .[/go]

My question:

$$c What now?
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . O X . . . .
$$ | . O O . O X . . . .
$$ | . O X X X W . . ,
$$ | . X X . . . . . . .
$$ | . . O . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .

Click Here To Show Diagram Code

[go]$$c What now?
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . O X . . . .
$$ | . O O . O X . . . .
$$ | . O X X X W . . ,
$$ | . X X . . . . . . .
$$ | . . O . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .[/go]

DO NOT READ THIS IF YOU WANT TO SOLVE THE CORNER PROBLEM BELOW YOURSELF

Blak could kill white, but he has to be careful about his stones too. Should black go for the kill, or does he have to defend before? He probably can kill, as otherwise white could take this cut as part of the joseki sequence.

Promised Corner problem:

$$c Black to play - status of white corner?
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . O X . . . .
$$ | . O O . O X . . . .
$$ | . O X X X X . . ,
$$ | . X X . . . . . . .
$$ | . . a . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .

Click Here To Show Diagram Code

[go]$$c Black to play - status of white corner?
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . O X . . . .
$$ | . O O . O X . . . .
$$ | . O X X X X . . ,
$$ | . X X . . . . . . .
$$ | . . a . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .[/go]

There was a white stone at a which I edited out. Not totally sure if it changes anything, you may see it as an extra-question

[Sverre]

Promised Corner problem:

$$c Black to play - white corner dies
$$ ------------------
$$ | . 2 . 7 1 . . . . .
$$ | 3 . . 4 O X . . . .
$$ | 6 O O . O X . . . .
$$ | 5 O X X X X . . ,
$$ | . X X . . . . . . .
$$ | . . a . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .

Click Here To Show Diagram Code

[go]$$c Black to play - white corner dies
$$ ------------------
$$ | . 2 . 7 1 . . . . .
$$ | 3 . . 4 O X . . . .
$$ | 6 O O . O X . . . .
$$ | 5 O X X X X . . ,
$$ | . X X . . . . . . .
$$ | . . a . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .[/go]

[Bill Spight]

My question:

$$c What now?
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . O X . . . .
$$ | . O O . O X . . . .
$$ | . O X X X W . . ,
$$ | . X X . . . . . . .
$$ | . . O . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .

Click Here To Show Diagram Code

[go]$$c What now?
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . O X . . . .
$$ | . O O . O X . . . .
$$ | . O X X X W . . ,
$$ | . X X . . . . . . .
$$ | . . O . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .[/go]

$$c What now?
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . O X . . . .
$$ | . O O . O X . 1 . .
$$ | . O X X X O 6 7 ,
$$ | . X X . . . . . . .
$$ | . . O 3 2 5 . . . .
$$ | . . . 4 . . . . . .
$$ | . . . . . . . . . .

Click Here To Show Diagram Code

[go]$$c What now?
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . O X . . . .
$$ | . O O . O X . 1 . .
$$ | . O X X X O 6 7 ,
$$ | . X X . . . . . . .
$$ | . . O 3 2 5 . . . .
$$ | . . . 4 . . . . . .
$$ | . . . . . . . . . .[/go]

From the Suzuki-Kitani Small Joseki Dictionary.

[Jonas]

Oh boy the move 5 simply looks gorgeous, while so simple I bet I'd have missed it in an actual game.

[LR24]

A late "Thanks" for the replies

I would never come to think about the sequence Bill posted

[HermanHiddema]

For a more interesting corner problem, remove the stone at E16.

So:

$$W
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . 7 8 . . . .
$$ | . 5 1 . 9 0 . . . .
$$ | . 3 2 X . B . . . ,
$$ | . 4 6 . . . . . . .
$$ | . . W . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .

Click Here To Show Diagram Code

[go]$$W
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . 7 8 . . . .
$$ | . 5 1 . 9 0 . . . .
$$ | . 3 2 X . B . . . ,
$$ | . 4 6 . . . . . . .
$$ | . . W . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .[/go]

In this joseki (3-3 invasion after black answers the approach with the high move ), what is the status if white plays tenuki with ?

[Bill Spight]

For a more interesting corner problem, remove the stone at E16.

So:

$$W
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . 7 8 . . . .
$$ | . 5 1 . 9 0 . . . .
$$ | . 3 2 X . B . . . ,
$$ | . 4 6 . . . . . . .
$$ | . . W . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .

Click Here To Show Diagram Code

[go]$$W
$$ ------------------
$$ | . . . . . . . . . .
$$ | . . . . 7 8 . . . .
$$ | . 5 1 . 9 0 . . . .
$$ | . 3 2 X . B . . . ,
$$ | . 4 6 . . . . . . .
$$ | . . W . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .[/go]

In this joseki (3-3 invasion after black answers the approach with the high move ), what is the status if white plays tenuki with ?

White needs medical help. He is in critical condition.