@Chef: Actually, your strategy did work. You built influence, cut, and as a result, he was weak enough to be attacked profitably.

The only problem is that you didn't notice that your strategy had worked.
At move 91, the basic outline of your attack is in place, cutting at J17. In the next score or so moves, your central influence supports those cutting stones, and you can attack at move 119 with M18.
$$Bc
$$-------------------------
$$ . . . X . . . . . . . . . .
$$ . . . X O O . 1 . . . . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .
- Click Here To Show Diagram Code
[go]$$Bc
$$-------------------------
$$ . . . X . . . . . . . . . .
$$ . . . X O O . 1 . . . . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .[/go]
You don't have to wait until he carelessly shorts himself on liberties. As best I can tell, if you play M18 from move 119 onward, he has to win a ko for life.
This doesn't work:
$$Bc
$$-------------------------
$$ . . . X 6 5 3 . 4 . . . . .
$$ . . . X O O 7 1 2 . . . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .
- Click Here To Show Diagram Code
[go]$$Bc
$$-------------------------
$$ . . . X 6 5 3 . 4 . . . . .
$$ . . . X O O 7 1 2 . . . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .[/go]
...nor does this:
$$Bc
$$-------------------------
$$ . . . X . 7 5 . 6 . . . . .
$$ . . . X O O 2 1 3 4 . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .
- Click Here To Show Diagram Code
[go]$$Bc
$$-------------------------
$$ . . . X . 7 5 . 6 . . . . .
$$ . . . X O O 2 1 3 4 . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .[/go]
...nor this:
$$Bc
$$-------------------------
$$ . . . X 9 6 5 7 . 8 . . .
$$ . . . X O O 2 1 3 4 . . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .
- Click Here To Show Diagram Code
[go]$$Bc
$$-------------------------
$$ . . . X 9 6 5 7 . 8 . . .
$$ . . . X O O 2 1 3 4 . . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .[/go]
...nor this:
$$Bc
$$-------------------------
$$ . . . X 5 7 2 3 . . . . . .
$$ . . . X O O 4 1 6 . . . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .
- Click Here To Show Diagram Code
[go]$$Bc
$$-------------------------
$$ . . . X 5 7 2 3 . . . . . .
$$ . . . X O O 4 1 6 . . . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .[/go]
...so the best for white may be this:
$$Bc The ko - which he has to win TWICE
$$-------------------------
$$ . . . X 4 . 2 3 . . . . . .
$$ . . . X O O 5 1 6 . . . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .
- Click Here To Show Diagram Code
[go]$$Bc The ko - which he has to win TWICE
$$-------------------------
$$ . . . X 4 . 2 3 . . . . . .
$$ . . . X O O 5 1 6 . . . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .[/go]
EDIT: this may be better. He still has to win it twice, but he takes first:
$$Bc 10 @ 6
$$-------------------------
$$ . . . X 9 8 5 6 7 . . . . .
$$ . . . X O O 2 1 3 4 . . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .
- Click Here To Show Diagram Code
[go]$$Bc 10 @ 6
$$-------------------------
$$ . . . X 9 8 5 6 7 . . . . .
$$ . . . X O O 2 1 3 4 . . . .
$$ . . . X X O . X O O . O . .
$$ . . . . X O O O X X O O . .
$$ . . . X X O O X . X O . . .
$$ . . . . X X X . . X O . . .
$$ . . . . . X . . X . X . . .
$$ . . . . . X . . . . X . . .
$$ . . . . . . . . . . . . . .[/go]
...but then, I'm not known for reading accuracy...
