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computer-go: Mirror Go
I'd like to introduce two Mirror Go games in CGF special meeting.
At first White turn's mirror Go.
It's hard to understand at a glance, White plays mirror Go.
If Black did not play Tengen(Center of the board) till the last,
White would win by 5.5 komi points.
But in 205th move, GnuGo played Tengen with capturing
white 9 stones, and stopped the mirror Go.
Black : GnuGo 3.3.6
White : Ando-Kun's Go
White played N-12 his 205th move.
A B C D E F G H J K L M N O P Q R S T
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19 | . . . . . . . . . . . . X X . . . . . | 19
18 | . . . X . . X X X . . X . O X O X . . | 18
17 | . . X O X . . O X O O X X O X . X . . | 17
16 | X X . , X . X . . X X O O X X X . . . | 16
15 | O X X . . . . X X . . O . O . . . X . | 15
14 | O O . X . X O X O O O . O . . X . O . | 14
13 | . . O X O X . X X X O O . . O X . X . | 13
12 | . . O . X . O O X O X O O O O O O X . | 12
11 | . . . O X X X X O O X O X O X . X O . | 11
10 | . O O , O X O O O , X X X O X , X X . | 10
9 | . X O . O X O X O X X O O O O X . . . | 9
8 | . O X X X X X X O X O X X . O . X . . | 8
7 | . O . O X . . X X O O O . O X O X . . | 7
6 | . X . O . . X . X X X O X O . O . X X | 6
5 | . O . . . X . X . . O O . . . . O O X | 5
4 | . . . O O O X X O O . . O . O , . O O | 4
3 | . . O . O X O O X X O X . . O X O . . | 3
2 | . . O X O X . O . . O O O . . O . . . | 2
1 | . . . . . O O . . . . . . . . . . . . | 1
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A B C D E F G H J K L M N O P Q R S T
By contrast, Katsunari played well smarter anti mirror Go.
Ando was black, and played Tengen its first move to play mirror Go.
But Katsunari's next move was near Tengen soon!
Black : Ando-Kun's Go
White : Katsunari
White played K-9 his 2nd move.
A B C D E F G H J K L M N O P Q R S T
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19 | . . . . . . . . . . . . . . . . . . . | 19
18 | . . . . . . . . . . . . . . . . . . . | 18
17 | . . . . . . . . . . . . . . . . . . . | 17
16 | . . . , . . . . . , . . . . . , . . . | 16
15 | . . . . . . . . . . . . . . . . . . . | 15
14 | . . . . . . . . . . . . . . . . . . . | 14
13 | . . . . . . . . . . . . . . . . . . . | 13
12 | . . . . . . . . . . . . . . . . . . . | 12
11 | . . . . . . . . . . . . . . . . . . . | 11
10 | . . . , . . . . . X . . . . . , . . . | 10
9 | . . . . . . . . . O . . . . . . . . . | 9
8 | . . . . . . . . . . . . . . . . . . . | 8
7 | . . . . . . . . . . . . . . . . . . . | 7
6 | . . . . . . . . . . . . . . . . . . . | 6
5 | . . . . . . . . . . . . . . . . . . . | 5
4 | . . . , . . . . . , . . . . . , . . . | 4
3 | . . . . . . . . . . . . . . . . . . . | 3
2 | . . . . . . . . . . . . . . . . . . . | 2
1 | . . . . . . . . . . . . . . . . . . . | 1
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A B C D E F G H J K L M N O P Q R S T
And it's a strange shape!
Black could not play L-9 for his only one liberty.
This is a well-known anti mirror Go opening.
and Katsunari had it.
Black played C-17 his 19th move.
A B C D E F G H J K L M N O P Q R S T
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19 | . . . . . . . . . . . . . . . . . . . | 19
18 | . . . . . . . . . . . . . . . . . . . | 18
17 | . . X . . . . . . . . . . . . . . . . | 17
16 | . . . , . . . . . , . . . . . , . . . | 16
15 | . . . . . . . . . . . . . . . . . . . | 15
14 | . . . . . . . . . . . . . . . . . . . | 14
13 | . . . . . . . . . . . . . . . . . . . | 13
12 | . . . . . . . . O O O . . . . . . . . | 12
11 | . . . . . . . O X X X O . . . . . . . | 11
10 | . . . , . . . . O X . . . . . , . . . | 10
9 | . . . . . . . X O O O X . . . . . . . | 9
8 | . . . . . . . . X X X . . . . . . . . | 8
7 | . . . . . . . . . . . . . . . . . . . | 7
6 | . . . . . . . . . . . . . . . . . . . | 6
5 | . . . . . . . . . . . . . . . . . . . | 5
4 | . . . , . . . . . , . . . . . , . . . | 4
3 | . . . . . . . . . . . . . . . . . . . | 3
2 | . . . . . . . . . . . . . . . . . . . | 2
1 | . . . . . . . . . . . . . . . . . . . | 1
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A B C D E F G H J K L M N O P Q R S T
Hiroshi Yamashita