: ( 58bc)
White pushes at the left edge.

: (146 58br)
Black connects in the corner.

We primarily thought that Black would benefit by one point, if he blocked immediately with . But, as it turned out later, Black's choice how to defend at the left edge does not affect the final scores of the game.

:
White's move is a tesuji that ca be easily overlooked.

:
Sooner or later, Black will have to add a protective move inside his lower left corner.

Otherwise, if he approached White's left-hand group with and in the lower left corner, White's placement at would threaten a double snap-back, with or .

:
Black has to add a protective move in the upper left corner as well, before occupying White's liberty with .

Black plays 4/4 reductions.

Capture Variation:

Compared to the super²ordinate variation, ...

• White's cumulated gain in the upper left corner is two points.
• Black gained one point of territory in the upper left centre.
• Black did not capture a White stone in the left centre, so losing two points.
• White's cumulated gain in the lower left corner is four points.
• Black destroyed two points of White's territory in the upper right.
• Black captured White's single stone in the right centre, so gaining two points.
• White did not capture Black's stone in the lower right, so losing two points.

In total, White gained one point.

White + 1 => White + 2

Semeai Variation:

Compared to the super²ordinate variation, ...

• Black's cumulated gain in the upper left corner is two points.
• Black gained one point of territory in the upper left centre.
• Black did not capture a White stone in the left centre, so losing two points.
• Black's cumulated gain in the lower left corner is two points.
• Black captured one White stone less in the left centre, so losing two points.
• White capture two Black stones more in the upper right, so gaining two points.
• White captured one Black stone more in the lower right, so gaining two points.

In total, White gained three points.

Black + 7 => Black + 4