Life In 19x19

Hey guys,

There is this one trick following a night's approach to a corner star point stone (I don't know much Go terminology). I used to have a book on how to deal with it, but I had to return it, and now I that I faced it today, I fell for the trick.

I attached a short file of the sequence I know that is correct. I just need to know how to follow up (white).
If the file doesn't work, here's the sequence, B: Q16, W: O17, B: N16, W: O16, B:O15. How do I follow up correctly?

Please provide all logical sequences .

Thank you so much in advance,
-RedHazel

For everyone else's convinience:

White should cut at N15, playing P15 is falling for the trick. Specifically:

Click Here To Show Diagram Code

[go]$$W Endgame tesuji at [b]a[/b]
$$ --------------------+
$$ . . . . . . . . . . |
$$ . . . . a . . . . . |
$$ . . . . O . . . . . |
$$ , . 5 X O 2 X . . . |
$$ . . 7 3 X 1 . . . . |
$$ . . . 6 4 . . . . . |
$$ . . . . . . . . . . |
$$ . . . . . . . . . . |[/go]

Click Here To Show Diagram Code

[go]$$W No tesuji at [b]a[/b]
$$ --------------------+
$$ . . . . . . . . . . |
$$ . . . . a . . . . . |
$$ . . . . O . . . . . |
$$ , . 3 X O . X . . . |
$$ . . 5 1 X 2 . . . . |
$$ . . . 4 . . . . . . |
$$ . . . . . . . . . . |
$$ . . . . . . . . . . |[/go]

Black can also go for the crazy sacrifice the corner and build a big wall variation:

Click Here To Show Diagram Code

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

Or if he's extra crazy play 6 as nobi in the corner and try to live in the corner and make a wall and even pressure the white group in between but it's rather adventurous and needs support to work.