: ( 648kh)
Black pushes at the top, but this move in no absolute sente (and a grave mistake, as we will see). Apparently, Black underestimated that his lower left corner is still open.

Black's push is played outside the Main Semeai area, so it loses one tempo at the moment - in principle.
White however, cannot afford to let unplayed. She will have to come back to this block - sooner or later.

Nevertheless, if Black were already par with the Punishment Semeai Liberty Level (i.e. had one Main Semeai Liberty less than here), pushing at would be a fatal mistake. White would continue with the Main Semeai; please refer to ( 648ap) for details.
This implies that Black must not lose another - second - tempo in the Main Semeai, as long as White has not blocked his push (and so returning one tempo in the Main Semeai).

: (A 648kj)
Quite surprisingly, White plays the wedge in the left centre, threatening to capture some of Black's stones, or even kill his entire group at the left.

Pushing with from above, instead, would be worse for her.

:
As we now know, this kikashi should not be played, but kept in reserve as a ko threat.

: ( A 648km)
White plays Dany's atekomi.

Please note that this move is played outside the Main Semeai, but does not lose a tempo therein, because becomes an approach-move liberty of White's group at the left.
Black is still par with the Punishment Semeai Liberty Level. Please remember that a White move at is still mandatory.

However, as we know now, it would be best for White to play her kikashi at in the lower left corner. Thereafter, Black cannot avoid losing the game by a large margin.

:
Black is bound to follow the Main Semeai, and so gives atari at White's two stones in the lower left.

:
White connects, as she does not want to sacrifice her two stones here, which would lose one point overall. Additionally, Dany's Sacrifice would bring Black's left-hand group to life easily.

:
Black intends to initiate Dany's Ko, but not necessarily to fight it until the very end.
Please note that this move loses a tempo in the Main Semeai, as the approach-move liberty at is still active.

Ko: ;

; :
The ko fight starts.

: (138 648kn)
Black secures two eyes in the lower left corner.

He is unable to give atari at the top by further pushing to .

: (A 648ko)
Now that Black is safely alive at the left, White blocks at the top, eventually answering Black's previous push.

She might want to take the opportunity of capturing some Black stones at the left, by giving atari at , but she will suffer from being too greedy.

; :
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 kikashi cannot be counted as an additional ko threat.
Here, in this subvariation, our earlier mistake will not matter, because White is able to win the ko anyway, see below.

:
Black erases his shortage of liberties at the left edge.

:
White connects her single stone at the upper edge, so losing one tempo in the Main Semeai.

:
Black will not win the ko fight in the left centre anyway, so he simplifies the issue by occupying one of White's approach-move liberties.

White is comfortably ahead in ko threats (9 x vs. 6 x ).

:
White has to connect the ko.

Black plays 3/3 reductions.

Please assume Black's second kikashi in the hanezeki (, ) played before.

Black will have to capture at before the end of the game.

Capture Variation:

Compared to the superordinate variation ...

• Black did not get any territory in the left centre, but captured one White stone there, so the net effect is zero.
• Black lost one point of territory in the lower left corner.
• Black did not destroy one point of White's territory at the top.

In total, Black lost two points.

Jigo => White + 2

Semeai Variation:

Compared to the superordinate variation ...

• Black did not get any territory in the left centre, but captured one White stone there, so the net effect is zero.
• Black lost one point of territory in the lower left corner.
• Black captured one White stone less in the upper left, so losing two points.
• White captured one Black stone less in the upper right, so losing one point.

In total, Black lost two points.

Jigo => White + 2