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[go]$$Wc Normally a mistake
$$ +--------------
$$ | . . 4 3 O . .
$$ | X X 6 X O . .
$$ | O 2 X O O . .
$$ | . X O . . . .
$$ | 1 X O . O . .
$$ | . O . . . . .
$$ | . O . . . . .
$$ | . . . . . . .[/go]

elsewhere
On the assumption that Black can win the ko, when he does so he gets 4 pts. in the corner instead of 3, a gain of 1 pt. over simply connecting with

. Normally this is a mistake, because White will play

and

when plays elsewhere on the board gain at least 3 pts. In that case spending one extra move to gain only 1 pt. will not be worth it.
N.B.

and

simply represent the results of the ko fight. That's not actually how play would go.