I have a question about the endgame tesuji in this position

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[go]$$W
$$ ----------------
$$ - . . . . . . . . . .
$$ - . . . . . . O X . .
$$ - . . . O O . O X . .
$$ - . O O X X X X X . .
$$ - . . . . . . . . . .
$$ - . . O . . . . . . .
$$ - . . . . . . . . . .
$$ - . . . . . . . . . .
$$ - . . . . . . . . . .[/go]

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[go]$$W
$$ ----------------
$$ - . . . . B 3 2 . . .
$$ - . . 5 . . 1 O X . .
$$ - . . 4 O O 6 O X . .
$$ - . O O X X X X X . .
$$ - . . . . . . . . . .
$$ - . . O . . . . . . .
$$ - . . . . . . . . . .
$$ - . . . . . . . . . .
$$ - . . . . . . . . . .[/go]

The tesuji is at the marked black stone, the above continuation is given as the solution.

Click Here To Show Diagram Code

[go]$$W
$$ ----------------
$$ - . . . . B 3 2 . . .
$$ - . . . . 5 1 O X . .
$$ - . . 4 O O . O X . .
$$ - . O O X X X X X . .
$$ - . . . . . . . . . .
$$ - . . O . . . . . . .
$$ - . . . . . . . . . .
$$ - . . . . . . . . . .
$$ - . . . . . . . . . .[/go]

But I can't see the continuation after white goes here. It seems that white either gets away or there's a ko where white takes first. It's really bugging me, is there anything black can do?

Ko would be a giant disaster for white, so it's fine.

Usually in endgame problem books ko is considered a worse result for the opponent. The books will post solutions consistent with this idea.

hmmm, okay O: the reason I asked was that on this page on sensei's http://senseis.xmp.net/?EndgameTesuji18, it shows white 1 as white's resistance and that it is futile.

Ko should be fine then, thanks guys O: