I played this game from move 47 up to move 79 as black, and lost about 5.9 points. Actually, I played a bit further and made a large mistake on move 81; however, since my study plan calls for this playout to cover moves 47–80, I am not including that mistake in this review. I will add it to my problem collection instead.
Game 32, position 1
- Click Here To Show Diagram Code
[go]$$Bc White clamps at
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . O X . X O X . . . X O O X O . |
$$ | . . . O . O X . X , . . . X . X O O . |
$$ | . . . . . O . . . . . . . . . X X X . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O X O . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . O X . . |
$$ | . . . . . O . 3 . . . . . X . . O . . |
$$ | . . . X X 2 . . . , . . X . . O . . . |
$$ | . . . . 5 O . 1 . . . X O X . . . . . |
$$ | . . a 4 X O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
I expected white to push through with
at
, but instead white played this clamp. I thought this move looked like a mistake, but it's only losing about 0.3 points. I felt pretty unsure about my response at
, but it is actually okay;
a is slightly worse and reverts to the same sequence as if
at
.
Game 32, position 2
- Click Here To Show Diagram Code
[go]$$Wc Several mistakes
$$ | . . X , . . . . . ,
$$ | . . . . . . . . . .
$$ | . . . . . . . . . .
$$ | . . . X 4 . . . . .
$$ | . . a 1 2 3 . . . .
$$ | . . . . b O . X . .
$$ | . . . X X O . . . ,
$$ | . . c . X O . X . .
$$ | . . 6 O X O . . . .
$$ | . . . . 5 . . . . .
$$ --------------------[/go]
With
, black's group is too thin; black should defend at
a instead. By reinforcing in this way, black would be strong enough to play
; but since black did not play
a in the game,
is too weak and black should have played at
c instead.
is also a mistake. White should push through at
b and fight.
Game 32, position 3
- Click Here To Show Diagram Code
[go]$$Wc More mistakes
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . O X . X O X . . . X O O X O . |
$$ | . . . O . O X . X , . . . X . X O O . |
$$ | . . . . . O . . . . . . . . . X X X . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O X O . . . . . . . . . . . . . . |
$$ | . 4 . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X X . O . . . . . . . . . O . . |
$$ | . . . O X O . a 1 3 . . . . . O X . . |
$$ | . . . X O O . X . 2 . . . X . . O . . |
$$ | . . . X X O . . X , . . X . . O . . . |
$$ | . . . X X O . X . O . X O X . . . . . |
$$ | . . X O X O . O X . . . . . . b . . . |
$$ | . . . . O . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
After
, I considered cutting off white's stone by playing at
a, but I thought the fight might be bad for me so I played
instead. Black's bottom group is a bit weak after
, which I think increases the value of
b, so
instead of
b is also a mistake.
Variation
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[go]$$Wc Territory
$$ | . . X , . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . 5 7 . . . . . . . . . |
$$ | . . . X X . O 3 4 6 8 . . . . . O . . |
$$ | . . . O X O . 2 1 . . . . . . O X . . |
$$ | . . . X O O . X . . . . . X . . O . . |
$$ | . . . X X O . . X , . . X . . O . . . |
$$ | . . . X X O . X . O . X O X . . . . . |
$$ | . . X O X O . O X . . . . . . . . . . |
$$ | . . . . O . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Black can build some pretty nice territory by cutting with
and
instead.
Game 32, position 4
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[go]$$Wc White's sagari
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . b . d 3 . . . . . . . . . . |
$$ | . . . . O X . X O X . . . X O O X O . |
$$ | . . . O . O X . X , . . . X . X O O . |
$$ | . . . . . O . . . c . . . . . X X X . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O X O . . . . . . . . . . . . . . |
$$ | . X . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X X . O . . . . . . . . . O . . |
$$ | . . . O X O . . O O . . . . . O X . . |
$$ | . . . X O O . X . X . . . X . . O . . |
$$ | . . . X X O . . X , . . X . . O . . . |
$$ | . . . X X O . X . O . X O X . . . . . |
$$ | . . X O X O . O X . . . . . . . . . . |
$$ | . . 2 1 O a . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
After
, white tenukis with
. This inconsistent play is not great for white, but what should black do?
Actually, capturing three stones with
a would be a fine move for black, even though white will be able to live on the top.
My move was
b, but this is losing 1.4 points and is worse than
c or
d. I was only thinking of ensuring
dies while preserving territory on the top, but this would allow white to aim for the center:
Variation b
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[go]$$Bc White's center-facing wall
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . 1 . a O . . . . . . . . . . |
$$ | . . . . O X . X O X 3 7 . X O O X O . |
$$ | . . . O . O X 5 X 2 6 . . X . X O O . |
$$ | . . . . . O . . 4 . . . . . . X X X . |
$$ | . . . . . . . 8 . . . . . . . . O . . |
$$ | . . O X O . . . . . . . . . . . . . . |
$$ | . X . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . O . . . |[/go]
By playing like this, white may profit from black's slack move at
. In the game, white played at
a instead of
, which is a mistake. There will be a followup post about this in my problem collection thread.
Variation c
- Click Here To Show Diagram Code
[go]$$Bc Tiger's mouth
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . a . . W . . . . . . . . . . |
$$ | . . . . O X . X W X d . . X O O X O . |
$$ | . . . O . O X . X , c . . X . X O O . |
$$ | . . . . . O . b . 1 . . . . . X X X . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O X O . . . . . . . . . . . . . . |
$$ | . X . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . O . . . |[/go]
With
, black maintains access to the center. This is more important than capturing the marked stones. For example, a white move at
a may simply be ignored. White moves such as
b,
c, or
d, however, which threaten the connection of black's top groups or access to the center, would merit some response.
Variation d
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[go]$$Bc White 10, black 11 at a, b
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . 1 W 6 9 7 . b . . . . . |
$$ | . . . . O X . X W X a 8 . X O O X O . |
$$ | . . . O . O X . X 2 4 . . X . X O O . |
$$ | . . . . . O . . 5 3 . . . . . X X X . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O X O . . . . . . . . . . . . . . |
$$ | . X . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . O . . . |[/go]
This
is not the best move, but I include it because it is the best move with a similar intention to the move I played. The sequence shown here is not white's best sequence, but is simply showing how black might deal with some white overplays. If white cuts at
, black maintains access to the center with
and
. White should now sacrifice the two marked stones, but if they stubbornly cling to life, black may kill white's corner instead with the sequence to
b.