- Click Here To Show Diagram Code
[go]$$Bm113 7 MSL
$$ +---------------------------------------+
$$ | . . . . O . . . . . . . X . . . O X . |
$$ | . . . X X O b X O O . X O X O . . O . |
$$ | . . . X O X . O . . . X O a 2 O O . . |
$$ | . X O , . . . . . O . X . O O X . . . |
$$ | . . X X X X O O O . O X X 1 X X O O . |
$$ | . X . O O O X X X O . . X . X O . . . |
$$ | O O O O . X O O X X O O . O X . . W . |
$$ | O X . X . X . O O X O . . . X X X X X |
$$ | O X . X . . . O X X O . X X X X O O O |
$$ | O O O X . X . O X O O X X O O O O X . |
$$ | X O O O X . . O X O . X O O O . X X X |
$$ | X X O O X . . O X O . X O O X X X O O |
$$ | X . O O X . . O X O . X O O O X X X O |
$$ | . O O . O X . O X O . X X O O O X O O |
$$ | O O X O 3 X . O X O X . O X X X O O O |
$$ | O X X X X . . O X O O O O X O X O O X |
$$ | O . . . O X . O X X X X X . O X X O X |
$$ | O . X . . . X O O O O O O X O X . O X |
$$ | . X . . . . . O . . . . O X X X . O . |
$$ +---------------------------------------+[/go]
-- Michael Redmond's Kikashi in the Bamboo Joint is a tesuji, which only unfolds its effect in the "classical" line, where WHITE occupied the Guzumi Point
.
It forces White to choose between the solid connection
and the atari W
A above.
-- The solid connection is mandatory in this position, where White must not lose any tempo in the Main Semeai, despite is loses points compared to the atari.
The atari of W
A would benefit White in the upper right territorially, but would also lose one tempo in the Main Semeai. Black would be able to play the large endgame move B
B in the upper left, capturing all single White stones in this area.
-- Black gives atari at White's two stones in the lower left.
- Click Here To Show Diagram Code
[go]$$Wm116 7 MSL
$$ +---------------------------------------+
$$ | . . 4 3 O 5 . . . . . . X . . . O X . |
$$ | . . 6 X X O 1 X O O . X O X O . . O . |
$$ | . . . X O X . O . . . X O . O O O . . |
$$ | . X O , 8 7 . . . O . X . O O X . . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | . X . O O O X X X O . . X . X O . . . |
$$ | O O O O . X O O X X O O . O X . . O . |
$$ | O X . X . X . O O X O . . . X X X X X |
$$ | O X . X . . . O X X O . X X X X O O O |
$$ | O O O X . X . O X O O X X O O O O X . |
$$ | X O O O X . . O X O . X O O O . X X X |
$$ | X X O O X . . O X O . X O O X X X O O |
$$ | X . O O X . . O X O . X O O O X X X O |
$$ | . O O a O X . O X O . X X O O O X O O |
$$ | O O X O X X . O X O X . O X X X O O O |
$$ | O X X X X . . O X O O O O X O X O O X |
$$ | O . . . O X . O X X X X X . O X X O X |
$$ | O . X . . b X O O O O O O X O X . O X |
$$ | . X . . . . 2 O . . . . O X X X . O . |
$$ +---------------------------------------+[/go]
-- White continues with the interrupted sequence in the upper left corner.
She is unable to connect her two stones with a move at W
A, instead, as Black would answer with
again.
-- This descent to the bottom line is MANDATORY in the "classical" line, defending Black's territory in the lower left corner.
Mistakenly playing the "usual" block / atari at
would be one point worse for Black (White would continue with the hasami-tsuke W
B in the lower left).
(Contrary, with the Guzumi Exchange played, this variation would NOT affect the outcome of the game.) -- White pushes at the upper edge, reducing Black's territory in the upper left in return.
-- White gives atari at Black's single stone.
-- Black captures, of course.
- Click Here To Show Diagram Code
[go]$$Wm124 7 MSL
$$ +---------------------------------------+
$$ | . . X O O O . . . . . . X . . . O X . |
$$ | . . X X X O O X O O . X O X O . . O . |
$$ | . . . X . X . O . . . X O . O O O . . |
$$ | . X O , X O . . . O . X . O O X 1 . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | . X . O O O X X X O . . X . X O . . . |
$$ | O O O O . X O O X X O O . O X . . O . |
$$ | O X . X . X . O O X O . . . X X X X X |
$$ | O X . X . . . O X X O . X X X X O O O |
$$ | O O O X . X . O X O O X X O O O O X . |
$$ | X O O O X . . O X O . X O O O . X X X |
$$ | X X O O X . . O X O . X O O X X X O O |
$$ | X . O O X . . O X O . X O O O X X X O |
$$ | . O O 2 O X . O X O . X X O O O X O O |
$$ | O O X O X X . O X O X . O X X X O O O |
$$ | O X X X X . . O X O O O O X O X O O X |
$$ | O . . . O X . O X X X X X . O X X O X |
$$ | O . X . . . X O O O O O O X O X . O X |
$$ | . X . . . . X O . . . . O X X X . O . |
$$ +---------------------------------------+[/go]
-- White continues with the Main Semeai.
Connecting at
, instead, would be still a mistake.
-- Black captures White's two stones in the lower left.
- Click Here To Show Diagram Code
[go]$$Wm126 7 MSL
$$ +---------------------------------------+
$$ | . . X O O O . . . . . . X . . . O X . |
$$ | . . X X X O O X O O 3 X O X O . . O . |
$$ | . . . X . X . O . . 5 X O . O O O . . |
$$ | . X O , X O . . . O . X . O O X O . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | 2 X . O O O X X X O . . X . X O . . . |
$$ | O O O O 4 X O O X X O O . O X . a O 1 |
$$ | O X . X . X . O O X O . . . X X X X X |
$$ | O X . X . . . O X X O . X X X X O O O |
$$ | O O O X . X . O X O O X X O O O O X . |
$$ | X O O O X . . O X O . X O O O . X X X |
$$ | X X O O X . . O X O . X O O X X X O O |
$$ | X . O O X . . O X O . X O O O X X X O |
$$ | . O O X . X . O X O . X X O O O X O O |
$$ | O O X . X X . O X O X . O X X X O O O |
$$ | O X X X X . . O X O O O O X O X O O X |
$$ | O . . . O X . O X X X X X . O X X O X |
$$ | O 6 X . . . X O O O O O O X O X . O X |
$$ | . X . . . . X O . . . . O X X X . O . |
$$ +---------------------------------------+[/go]
-- The mutual occupation of opponent's liberties continues.
The placement of this move is a bit unusual, more often it is played at W
A.
- Click Here To Show Diagram Code
[go]$$Wm132 7 MSL
$$ +---------------------------------------+
$$ | . . X O O O . . . . . . X . . . O X . |
$$ | . . X X X O O X O O O X O X O . . O . |
$$ | . . . X . X . O . . O X O . O O O . . |
$$ | . X O , X O . . . O . X . O O X O . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | X X . O O O X X X O . . X . X O . . . |
$$ | O O O O X X O O X X O O . O X . . O O |
$$ | O X . X . X 3 O O X O . . . X X X X X |
$$ | O X . X 4 1 2 O X X O . X X X X O O O |
$$ | O O O X . X a O X O O X X O O O O X . |
$$ | X O O O X . . O X O . X O O O . X X X |
$$ | X X O O X . . O X O . X O O X X X O O |
$$ | X . O O X . . O X O . X O O O X X X O |
$$ | . O O X . X . O X O . X X O O O X O O |
$$ | O O X . X X . O X O X . O X X X O O O |
$$ | O X X X X . . O X O O O O X O X O O X |
$$ | O . . . O X . O X X X X X . O X X O X |
$$ | O X X . . . X O O O O O O X O X . O X |
$$ | . X . . . . X O . . . . O X X X . O . |
$$ +---------------------------------------+[/go]
-- KataGo likes this wedge in the left centre, but which is NOT really effective here.
The usual "calm" kikashi of W
A,
would also do the job of preventing Black from getting any territory in the central area below in sente.
-- Black must give atari from the outside.
-- White's counter-atari is usually played at W
A.
-- As a matter of course, Black has to capture.
- Click Here To Show Diagram Code
[go]$$Wm136 7 MSL
$$ +---------------------------------------+
$$ | . . X O O O . . . . 1 2 X . . . O X . |
$$ | . . X X X O O X O O O X O X O . . O . |
$$ | . . . X . X . O . . O X O . O O O . . |
$$ | . X O , X O . . . O . X . O O X O . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | X X 6 O O O X X X O . . X . X O . . . |
$$ | O O O O X X O O X X O O 3 O X . . O O |
$$ | O X . X . X O O O X O . . . X X X X X |
$$ | O X 8 X X . X O X X O 5 X X X X O O O |
$$ | O O O X . X . O X O O X X O O O O X . |
$$ | X O O O X . . O X O . X O O O . X X X |
$$ | X X O O X . . O X O . X O O X X X O O |
$$ | X . O O X . . O X O . X O O O X X X O |
$$ | . O O X . X . O X O 7 X X O O O X O O |
$$ | O O X . X X . O X O X . O X X X O O O |
$$ | O X X X X . . O X O O O O X O X O O X |
$$ | O 4 . . O X . O X X X X X . O X X O X |
$$ | O X X . . . X O O O O O O X O X . O X |
$$ | . X . . . . X O . . . . O X X X . O . |
$$ +---------------------------------------+[/go]
-- White continues with the Main Semeai.
- Click Here To Show Diagram Code
[go]$$Wm144 7 MSL
$$ +---------------------------------------+
$$ | . . X O O O . 5 . . O X X . . . O X . |
$$ | . . X X X O O X O O O X O X O . . O . |
$$ | . . . X . X 4 O . . O X O . O O O . . |
$$ | . X O , X O . . . O . X . O O X O . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | X X X O O O X X X O . . X . X O . . . |
$$ | O O O O X X O O X X O O O O X . . O O |
$$ | O X . X a X O O O X O . . . X X X X X |
$$ | O X X X X 2 X O X X O O X X X X O O O |
$$ | O O O X . X 1 O X O O X X O O O O X . |
$$ | X O O O X . . O X O . X O O O . X X X |
$$ | X X O O X . . O X O . X O O X X X O O |
$$ | X . O O X . . O X O . X O O O X X X O |
$$ | . O O X . X . O X O O X X O O O X O O |
$$ | O O X . X X . O X O X . O X X X O O O |
$$ | O X X X X . . O X O O O O X O X O O X |
$$ | O X . . O X 3 O X X X X X . O X X O X |
$$ | O X X . . 6 X O O O O O O X O X . O X |
$$ | . X . . . . X O . . . . O X X X . O . |
$$ +---------------------------------------+[/go]
-- White's atari erases Black's hopes on some points of territory below.
-- Black's connection is mandatory.
He is unable to fight a ko after
, as White threatens to capture his three cutting stones above with W
A.
-- White plays her kikashi in the lower left corner.
-- Black inserts a kikashi of his own at the upper edge in return.
- Click Here To Show Diagram Code
[go]$$Wm150 7 MSL
$$ +---------------------------------------+
$$ | . . X O O O . O . . O X X . . . O X . |
$$ | . . X X X O O . O O O X O X O . . O . |
$$ | . . . X . X X O . . O X O . O O O . . |
$$ | . X O , X O . . . O . X . O O X O . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | X X X O O O X X X O . . X . X O . . . |
$$ | O O O O X X O O X X O O O O X 1 a O O |
$$ | O X 2 X . X O O O X O . 5 . X X X X X |
$$ | O X X X X X X O X X O O X X X X O O O |
$$ | O O O X . X O O X O O X X O O O O X . |
$$ | X O O O X . . O X O . X O O O . X X X |
$$ | X X O O X . . O X O . X O O X X X O O |
$$ | X 6 O O X . . O X O . X O O O X X X O |
$$ | 7 O O X . X . O X O O X X O O O X O O |
$$ | O O X . X X . O X O X 3 O X X X O O O |
$$ | O X X X X . . O X O O O O X O X O O X |
$$ | O X . . O X O O X X X X X . O X X O X |
$$ | O X X . . X X O O O O O O X O X . O X |
$$ | 4 X . . . . X O . . . . O X X X . O . |
$$ +---------------------------------------+[/go]
-- White continues with the Main Semeai.
Again, a move at W
A would look less extraordinary.
- Click Here To Show Diagram Code
[go]$$Bm157 7 MSL
$$ +---------------------------------------+
$$ | . . X O O O . O . . O X X 5 6 . O X . |
$$ | . . X X X O O . O O O X O X O . . O . |
$$ | . . . X . X X O . . O X O 8 O O O . . |
$$ | . X O , X O . . . O . X . O O X O . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | X X X O O O X X X O . 4 X . X O . . . |
$$ | O O O O X X O O X X O O O O X O 2 O O |
$$ | O X X X . X O O O X O . O . X X X X X |
$$ | O X X X X X X O X X O O X X X X O O O |
$$ | O O O X . X O O X O O X X O O O O X . |
$$ | 9 O O O X . . O X O . X O O O . X X X |
$$ | 1 7 O O X . . O X O . X O O X X X O O |
$$ | 3 . O O X . . O X O . X O O O X X X O |
$$ | O O O X . X . O X O O X X O O O X O O |
$$ | O O X . X X . O X O . O O X X X O O O |
$$ | O X X X X . . O X O O O O X O X O O X |
$$ | O X . . O X O O X X X X X 0 O X X O X |
$$ | O X X . . X X O O O O O O X O X . O X |
$$ | X X . . . . B O . . . . O X X X . O . |
$$ +---------------------------------------+[/go]
-- Black plays the final oki into White's eye at the left edge.
-- White captures the hanezeki's tail, choosing the Capture Variation.
Here, with Black's descent
in the lower left, the Semeai Variation would end two points worse for her.
- Click Here To Show Diagram Code
[go]$$Bm167 Capture Variation
$$ +---------------------------------------+
$$ | . . X O O O . O . . O X X X O . O X . |
$$ | . . X X X O O . O O O X O X O . . O . |
$$ | . . . X . X X O . . O X O O O O O . . |
$$ | . X O , X O . . . O . X . O O X O . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | X X X O O O . . . O . O X . X O . . . |
$$ | O O O O X X O O . . O O O O X O O O O |
$$ | O X X X . X O O O . O . O . X X X X X |
$$ | O X X X X X X O . . O O X X X X O O O |
$$ | O O O X . X O O . O O X X O O O O X . |
$$ | X O O O X . . O . O . X O O O . X X X |
$$ | X X O O X . . O . O . X O O X X X O O |
$$ | X . O O X . . O . O . X O O O X X X O |
$$ | O O O X . X . O . O O X X O O O X O O |
$$ | O O X . X X . O . O . O O X X X O O O |
$$ | O X X X X . . O . O O O O X O X O O X |
$$ | O X . . O X O O . . . . 1 O O X X O X |
$$ | O X X . . X X O O O O O O X O X . O X |
$$ | X X . . . . X O . . . . O X X X . O . |
$$ +---------------------------------------+[/go]
-- Black recaptures four White stones.
- Click Here To Show Diagram Code
[go]$$Wm168 Capture Variation
$$ +---------------------------------------+
$$ | . . X O O O . O . . O X X X O . O X . |
$$ | . . X X X O O . O O O X O X O . . O . |
$$ | . . . X . X X O . . O X O O O O O . . |
$$ | . X O , X O . . . O . X . O O X O . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | X X X O O O . . . O . O X . X O . . . |
$$ | O O O O X X O O . . O O O O X O O O O |
$$ | O X X X . X O O O . O . O . X X X X X |
$$ | O X X X X X X O . . O O X X X X O O O |
$$ | O O O X . X O O . O O X X O O O O X . |
$$ | X O O O X . . O . O . X O O O . X X X |
$$ | X X O O X . . O . O . X O O X X X O O |
$$ | X . O O X . . O . O . X O O O X X X O |
$$ | O O O X . X . O . O O X X O O O X O O |
$$ | O O X . X X . O . O . O O X X X O O O |
$$ | O X X X X . . O . O O O O X . X O O X |
$$ | O X . . O X O O . . . . X 3 1 X X O X |
$$ | O X X . . X X O O O O O O X . X 2 O X |
$$ | X X . . . . X O . . . . O X X X 4 O 5 |
$$ +---------------------------------------+[/go]
-- Joachim Meinhardt's Rediscovered Oki wins White the game.
-- Black is forced to continue with the dissolving of the hanezeki.
- Click Here To Show Diagram Code
[go]$$Bm173 Capture Variation
$$ +---------------------------------------+
$$ | . . X O O O . O . . O X X X O . O X . |
$$ | . . X X X O O . O O O X O X O . . O . |
$$ | . . . X . X X O . . O X O O O O O . . |
$$ | . X O , X O . . . O . X . O O X O . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | X X X O O O . . . O . O X . X O . . . |
$$ | O O O O X X O O . . O O O O X O O O O |
$$ | O X X X . X O O O . O . O . X X X X X |
$$ | O X X X X X X O . . O O X X X X O O O |
$$ | O O O X . X O O . O O X X O O O O X . |
$$ | X O O O X . . O . O . X O O O . X X X |
$$ | X X O O X . . O . O . X O O X X X O O |
$$ | X . O O X . . O . O . X O O O X X X O |
$$ | O O O X . X . O . O O X X O O O X O O |
$$ | O O X . X X . O . O . O O X X X O O O |
$$ | O X X X X . . O . O O O O X 4 X O O 3 |
$$ | O X . . O X O O . . . 2 X O O X X O 1 |
$$ | O X X . . X X O O O O O O X . X X O 5 |
$$ | X X . . . . X O . . . . O X X X X O O |
$$ +---------------------------------------+[/go]
-- Typical for AI, KataGo likes to play White's kikashi in the lower right "early".
- Click Here To Show Diagram Code
[go]$$Wm178 Capture Variation
$$ +---------------------------------------+
$$ | . . X O O O . O . . O X X X O . O X . |
$$ | . . X X X O O . O O O X O X O . . O . |
$$ | . . . X 2 X X O . . O X O O O O O . . |
$$ | . X O , X O 1 . . O . X . O O X O . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | X X X O O O . . . O . O X . X O . . . |
$$ | O O O O X X O O . . O O O O X O O O O |
$$ | O X X X . X O O O . O . O . X X X X X |
$$ | O X X X X X X O . . O O X X X X O O O |
$$ | O O O X . X O O . O O X X O O O O X . |
$$ | X O O O X . . O . O . X O O O . X X X |
$$ | X X O O X . . O . O . X O O X X X . . |
$$ | X . O O X . . O . O . X O O O X X X . |
$$ | O O O X . X . O . O O X X O O O X . . |
$$ | O O X . X X . O . O . O O X X X . . . |
$$ | O X X X X . . O . O O O O X O X . . X |
$$ | O X . . O X O O . . . O . O O X X . X |
$$ | O X X . . X X O O O O O O X . X X . X |
$$ | X X . . . . X O . . . . O X X X X . . |
$$ +---------------------------------------+[/go]
White has sente to return to the upper left, saving her single stone, also giving atari at Black's two stones above.
Black connects.
- Click Here To Show Diagram Code
[go]$$B White's gains, compared to KataGo's solution ( = 1 / = 2).
$$ +---------------------------------------+
$$ | . . B O W O C O . . O X X X O . O X . |
$$ | . . B X X O O . O O O X O X O . . O . |
$$ | . . . X B X X O . . O X O O O O O . . |
$$ | . X O , B O O C C O . X . O O X O . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | X X X O O O . . . O . O X . X O C C C |
$$ | O O O O X X O O . . O O O O X O O O O |
$$ | O X X X . X O O O . O . O . X X X X X |
$$ | O X X X B X X O . . O O X X X X O O O |
$$ | O O O X . X O O . O O X X O O O O X . |
$$ | X O O O X . . O . O . X O O O . X X X |
$$ | X X O O X . . O . O . X O O X X X . . |
$$ | X . O O X . . O . O . X O O O X X X . |
$$ | O O O X . X . O . O O X X O O O X . . |
$$ | O O X . X X . O . O . O O X X X . . . |
$$ | O X X X X . . O . O O O O X O X . . X |
$$ | O X . . O X O O . . . O . O O X X . X |
$$ | O X X . . X X O O O O O O X . X X . X |
$$ | X X . . . . X O . . . . O X X X X . . |
$$ +---------------------------------------+[/go]
White gained twelve points.
- Click Here To Show Diagram Code
[go]$$B Black's gains, compared to KataGo's solution ( = 1 / = 2).
$$ +---------------------------------------+
$$ | . . X O O O . O . . O X X X O . O X . |
$$ | . . X X X O O . O O O X O X O . . O . |
$$ | . . . X X X X O . . O X O O O O O . . |
$$ | . X O , X O O . . O . X . O O X O . . |
$$ | . . X X X X O O O . O X X X X X O O . |
$$ | X X X O O O . . . O . O X . X O . . . |
$$ | O O O O X X O O . . O O O O X O O O O |
$$ | O X X X C X O O O . O . O . X X X X X |
$$ | O X X X X B X O . . O O X X X X O O O |
$$ | O O O X . X O O . O O X X O O O O X . |
$$ | X O O O X . . O . O . X O O O . X X X |
$$ | X X O O X . . O . O . X O O X X X . . |
$$ | X . O O X . . O . O . X O O O X X X . |
$$ | O O O X M X . O . O O X X O O O X . . |
$$ | O O X M X X . O . O . O O X X X . . . |
$$ | O X X X X . . O . O O O O X O X . . X |
$$ | O X . . O X O O . . . O . O O X X . X |
$$ | O X X . C X Z O O O O O O X . X X . X |
$$ | X X . . C C X O . . . . O X X X X . . |
$$ +---------------------------------------+[/go]
Black gained eleven points.
In total, Black lost one point by NOT playing the Guzumi Exchange.This slight advantage of just one point may have been one of the reasons why KataGo only found my Guzumi on the very last day of its initial training in 2019.