: ( 267)
Black tries to gain some advantage on the upper edge.

:
White pre-empts another outside ko for Black's group.

:
White has enough time to pre-empt Black's ko-threats on the left side.

:
Black must connect one of the ko-shapes.

:
White erases another Black ko-threat.

:
White connects the ko on the right.

In the centre, a double-ko is remaining, favouring White.

:
White wins the semeai by one move.