Posts: 476 Liked others: 193 Was liked: 83
Rank: Dutch 2 dan
GD Posts: 56
KGS: hopjesvla
Move 7 in the first diagramme is a nice tesuji, but I still wonder if this is really bigger than one of the other moves that were suggested. Effectively, white has pierced black's moyo in sente now. As to the merit of the peep he played at move 113 - I am baffled... To me, it really feels like game over now.
The difference between the game move and the monkey jump is quite subtle. As for the next move, I considered 'b' and 'c', but I think the straightforward 'a' is best here. For those interested, I put some analysis in the hidden tag.
[go]$$Wcm116 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . X . . . . . X . . . . . . . | $$ | . . . . . X O X X X . . . . X . . . . | $$ | . . X , X O . . O O O . . . . , X . . | $$ | . a . . X O . O . . . . . . X . . X . | $$ | b c . X . X O . . . . . . . . . O . . | $$ | . 1 . X . X O . . . . . . . . . . . . | $$ | . . . X X . . . . . . . . . . . X O . | $$ | . O O O O O O O . O . . . . . . O . . | $$ | . X O O X X X X . , O . . . . , . O . | $$ | . X X X X . . . X . O X . . . X X O . | $$ | . . . . O . O . . . O . . . . . O . . | $$ | . O X X X O O X . X . . . . X O . . . | $$ | . . O . . . . X . . . . X . X X O . . | $$ | . . . O O O O X . . X . . . . O X . . | $$ | . . . O . X X O X . . O X . . O . . . | $$ | . . O X X . . O . X X O . X X . O . . | $$ | . . O . . . O . O O X . . X O O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
Okay, so: black's next move. White didn't jump so far, and you'd like to block as severely as possible. This'll lead to a ko:
[go]$$Wcm116 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . X . . . . . X . . . . . . . | $$ | . . . . . X O X X X a . . a X . . . . | $$ | . . X , X O . a O O O . . . . , X . . | $$ | 4 5 . . X O . O . . . . . . X . . X . | $$ | 3 2 7 X . X O . . . . . . . . . O . . | $$ | 6 1 8 X . X O . . . . . . . . . . . . | $$ | . . . X X . . . . . . . . . . . X O . | $$ | . O O O O O O O . O . . . . . . O . . | $$ | . X O O X X X X . , O . . . . , . O . | $$ | . X X X X . . . X . O X . . . X X O . | $$ | . . . . O . O a . . O . . . a . O . . | $$ | . O X X X O O X . X . . . . X O . . . | $$ | . . O . . . . X . . . . X . X X O . . | $$ | . . . O O O O X . . X . . . . O X . . | $$ | . . . O . X X O X . . O X . . O . . . | $$ | . . O X X . . O . X X O . X X . O . . | $$ | . . O . . . O . O O X . . X O O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
However, it's a bit of a flower-ko for white - if he loses it, he hasn't lost that much (and should get compensation from his ko threat), but if black loses it, he's kind of screwed. That means that white's ko threats don't need to be that big (for example, the points marked 'a' should do), but black has to make big threats. NOT what he wants.
[go]$$Wcm116 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . X . . . . . X . . . . . . . | $$ | . . . . . X O X X X . . . . X . . . . | $$ | . . X , X O . . O O O . . . . , X . . | $$ | . a . . X O . O . . . . . . X . . X . | $$ | b . . X . X O . . . . . . . . . O . . | $$ | . 1 . X . X O . . . . . . . . . . . . | $$ | . . . X X . . . . . . . . . . . X O . | $$ | . O O O O O O O . O . . . . . . O . . | $$ | . X O O X X X X . , O . . . . , . O . |[/go]
If, at some point, both sides then take their sente moves, the results will be:
[go]$$Wcm116 After move a - move 5=tenuki $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . X . . . . . X . . . . . . . | $$ | . . . . . X O X X X . . . . X . . . . | $$ | . . X , X O . . O O O . . . . , X . . | $$ | 4 2 . . X O . O . . . . . . X . . X . | $$ | 3 6 . X . X O . . . . . . . . . O . . | $$ | 7 1 . X . X O . . . . . . . . . . . . | $$ | . . . X X . . . . . . . . . . . X O . | $$ | . O O O O O O O . O . . . . . . O . . | $$ | . X O O X X X X . , O . . . . , . O . |[/go]
[go]$$Wcm116 After move b $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . X . . . . . X . . . . . . . | $$ | . . . . . X O X X X . . . . X . . . . | $$ | . . X , X O . . O O O . . . . , X . . | $$ | 6 4 . . X O . O . . . . . . X . . X . | $$ | 2 3 . X . X O . . . . . . . . . O . . | $$ | 5 1 . X . X O . . . . . . . . . . . . | $$ | . . . X X . . . . . . . . . . . X O . | $$ | . O O O O O O O . O . . . . . . O . . | $$ | . X O O X X X X . , O . . . . , . O . |[/go]
Black's territory along the edge is equal in both cases. BUT, in the second diagramme, white has an extra stone on the second line that is causing black a little pain in the backside. This makes a difference of 1 point. Therefore, I think move 'a' is best.
_________________ My name is Gijs, from Utrecht, NL.
[go]$$Bcm117 ACTUAL GAME: Move 117. Points from prisoners: B 2 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . X . . . . . X . . . . . . . | $$ | . . . . . X O X X X . . . . X . . . . | $$ | . . X , X O . . O O O . . . . , X . . | $$ | . . . . X O . O . . . . . . X . . X . | $$ | . 1 . X . X O . . . . . . . . . O . . | $$ | . O . X . X O . . . . . . . . . . . . | $$ | . . . X X . . . . . . . . . . . X O . | $$ | . O O O O O O O . O . . . . . . O . . | $$ | . X O O X X X X . , O . . . . , . O . | $$ | . X X X X . . . X . O X . . . X X O . | $$ | . . . . O . O . . . O . . . . . O . . | $$ | . O X X X O O X . X . . . . X O . . . | $$ | . . O . . . . X . . . . X . X X O . . | $$ | . . . O O O O X . . X . . . . O X . . | $$ | . . . O . X X O X . . O X . . O . . . | $$ | . . O X X . . O . X X O . X X . O . . | $$ | . . O . . . O . O O X . . X O O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
[go]$$Wcm118 ACTUAL GAME: Move 118. Points from prisoners: B 2 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . X . . . . . X . . . . . . . | $$ | . . . . . X O X X X . . . . X . . . . | $$ | . . X , X O . . O O O . 1 . . , X . . | $$ | . . . . X O . O . . . . . . X . . X . | $$ | . X . X . X O . . . . . . . . . O . . | $$ | . O . X . X O . . . . . . . . . . . . | $$ | . . . X X . . . . . . . . . . . X O . | $$ | . O O O O O O O . O . . . . . . O . . | $$ | . X O O X X X X . , O . . . . , . O . | $$ | . X X X X . . . X . O X . . . X X O . | $$ | . . . . O . O . . . O . . . . . O . . | $$ | . O X X X O O X . X . . . . X O . . . | $$ | . . O . . . . X . . . . X . X X O . . | $$ | . . . O O O O X . . X . . . . O X . . | $$ | . . . O . X X O X . . O X . . O . . . | $$ | . . O X X . . O . X X O . X X . O . . | $$ | . . O . . . O . O O X . . X O O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
[go]$$Bcm119 ACTUAL GAME: Moves 119-120. Points from prisoners: B 2 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . X . . . . . X . . . . . . . | $$ | . . . . . X O X X X . . 1 . X . . . . | $$ | . . X , X O . . O O O . O . . , X . . | $$ | . . . . X O . O . . . . . . X . . X . | $$ | . X . X . X O . . . . . . . . . O . . | $$ | . O . X . X O . . . . . 2 . . . . . . | $$ | . . . X X . . . . . . . . . . . X O . | $$ | . O O O O O O O . O . . . . . . O . . | $$ | . X O O X X X X . , O . . . . , . O . | $$ | . X X X X . . . X . O X . . . X X O . | $$ | . . . . O . O . . . O . . . . . O . . | $$ | . O X X X O O X . X . . . . X O . . . | $$ | . . O . . . . X . . . . X . X X O . . | $$ | . . . O O O O X . . X . . . . O X . . | $$ | . . . O . X X O X . . O X . . O . . . | $$ | . . O X X . . O . X X O . X X . O . . | $$ | . . O . . . O . O O X . . X O O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
[go]$$Bcm121 ACTUAL GAME: Moves 121-130. Points from prisoners: B 2 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . X . . . . . X . . . . . . . | $$ | . . . . . X O X X X . . X . X . . . . | $$ | . . X , X O . . O O O . O 9 . , X . . | $$ | . . . . X O . O . . . 8 7 . X . . X . | $$ | . X . X . X O . . . . . . . . . O 3 . | $$ | . O . X . X O . . . . . O . . . . 4 . | $$ | . . . X X . . . . . . . . . . . X O . | $$ | . O O O O O O O . O . . . . . . O . . | $$ | . X O O X X X X . , O . . . . , . O . | $$ | . X X X X . . . X . O X . 0 . X X O . | $$ | . . . . O . O . . . O . . . . 5 O . . | $$ | . O X X X O O X . X . . . . X O 6 . . | $$ | . . O . . . . X . . . . X . X X O . . | $$ | . . . O O O O X . . X . . . . O X . . | $$ | . . . O . X X O X . . O X . . O 2 . . | $$ | . . O X X . . O . X X O . X X 1 O . . | $$ | . . O . . . O . O O X . . X O O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
[go]$$Bcm131 ACTUAL GAME: Moves 131-140. Points from prisoners: B 2 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . X . . . . 9 X . . . . . . . | $$ | . . . . . X O X X X 8 . X . X . . . . | $$ | . . X , X O . . O O O . O X . , X . . | $$ | . . . . X O . O . . . O X . X . . X . | $$ | . X . X . X O . . . . . . . . . O X . | $$ | . O . X . X O . . . . . O . . . . O . | $$ | . . . X X . . . . . . . . . . 5 X O . | $$ | . O O O O O O O . O . . . 2 . 1 O 4 . | $$ | . X O O X X X X . , O . . . . , 3 O . | $$ | . X X X X . . . X . O X . O . X X O . | $$ | . . . . O . O . . . O . 0 . . X O . . | $$ | . O X X X O O X . X . . . . X O O . . | $$ | . . O . . . . X . . . . X . X X O . . | $$ | . . . O O O O X . . X . . . . O X . . | $$ | . . . O . X X O X . . O X . . O O . . | $$ | . . O X X . . O 6 X X O . X X X O . . | $$ | . . O . . . O . O O X . . X O O . . . | $$ | . . . . . . . . . . 7 . . . . . . . . | $$ ---------------------------------------[/go]
Black resigned after move 140.
This was the third game of the 29th Oza title match in 1981; Black was Kato Masao and White was Hashimoto Shoji. The game can be found in Go World #27.
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