Under area rules III: White 66, Black pass, White 'c,' Black 'a,' White
'f,' Black 'g,' White takes ko, Black 'd,' White 'h,' Black 'a,' White
'e,' Black 'b,' White 'i,' Black 'j,' White pass, Black pass (end of the
game). Black wins by one point.
Under territory rules I: White 66, Black pass, White 'c,' Black 'a,'
White 'f,' Black 'g,' White takes ko, Black 'd,' White 'h,' Black 'a,'
White pass, Black pass (preliminary end), White 'e,' Black 'b,' White
'i,' Black 'j,' White pass, Black pass (end of the game). Black wins by
one point.
If White ignores Black's ko threat at 'd' and plays for an exchange,
Black still wins. The sequence is: White 66, Black pass, White 'c,'
Black 'a,' White 'f,' Black 'g,' White takes ko, Black 'd,' White 'b,'
Black 'h,' White pass, Black pass (preliminary end). Dia. 6-4-2 shows
the result at this point. Black wins by one point.
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