: ( 648cx)
Black continues with the ko fight in the centre.

Ko: ; ; ; ; ;

; :
Please understand these two moves as replacement for White's kikashi , in the centre, which had been played too early by us.

We now know that White's atari cannot be counted as an additional ko threat.
However, White is comfortably ahead in ko threats (3 x vs. 1 x ). Therefore, our above mentioned earlier mistake does not matter here.
White would win the ko, even with one ko threat less.

:
We will end the ko fight here, and let Black connect at the upper edge.

:
White connects the ko in the centre.

:
The Main Semeai continues.

Black plays 1/2 reductions.

Later, White will play her kikashi , in the lower left corner, so that Black must capture with before the end of the game.

Capture Variation:

Compared to the superordinate variation ...

• Black destroys an additional two points of White's territory at the top.
• White captured Black's stone in the lower right, so gaining two points.

In total, gains and losses compensate for each other.

White + 1 => White + 1

Semeai Variation:

Compared to the superordinate variation ...

• White captured an additional two Black stones at the top, so gaining two points.
• White captured one Black stone less in the lower right, so losing two points.

In total, gains and losses compensate for each other.

White + 1 => White + 1