11thNongshimCup/Stage 2 Game 2

Sub-page of 11thNongshimCup

White: Xie He (7d)

Black: Kim Seongjae (3d)

Result: W+1.5

Location: Pusan, Korea

Date: January 19, 2010

[ext] SGF

This may be my favorite game of the tournament so far. It's very close, with an intense ko battle and some big sacrifices on both sides. emeraldemon

[Diagram]
Moves 1 to 10  

emeraldemon: Note how this game has the same opening as /Stage 1 Game 4 where Xie He was also white. Through W6 it's the same as the small Chinese fuseki, but B7 approaches instead of drawing back at a.

[Diagram]
Moves 11 to 20  

emeraldemon: This sequence also has a similar feel to Xie He's fuseki in /Stage 2 Game 1, where White starts the tsuki-hiki joseki on the bottom right, plays on the top right, then comes back to complete a framework on the right side.

[Diagram]
Moves 21 to 30  
[Diagram]
Moves 31 to 40  

emeraldemon The double hane of B3, B5 here caught my eye, and espescially W6. Another way to play (which I do all the time) is like this:

[Diagram]
Double Hane  

emeraldemon: My positional judgement isn't strong enough to immediately say this is worse for W than the game, but I think it leaves less aji than the game sequence, which may be why W avoided it.

tapir (1d kgs): With moves like b pretty much sente, and after a defensive move around a white+circle really suffers and may die soon. As opposed to the game, where W40 eyes at the cut at c (so it became a sente move) and white settles. Now the black kosumi is weak despite all the stones black played in the area.

[Diagram]
Moves 41 to 50  

emeraldemon: After W2, the white group on top seems strong, and black is left with a few weak stones (circles). But Black makes a leaning attack against the left, presumably to strengthen the black group that still isn't quite alive on the left side. From that same principle that pros tend to leave aji as long as possible, you can generally assume every exchange is made to gain something specific. This lead me to wonder about W6/B7. I think maybe W wanted to prevent this:

[Diagram]
black cuts  
[Diagram]
cut doesn't work  

emeraldemon: I could be wrong about this though.

tapir: Imo, you are right about the direct cut, further there is the simple reason of strengthening the black stones which want to "attack" both white groups, a task impossible if they become too weak themselves. For aji, maybe thinking about some possible future exchanges like Black a, where White wants to play at b shows that there is quite a lot of aji left. (B7 can link up with the stone at a then)

[Diagram]
Moves 51 to 60  
[Diagram]
Moves 61 to 70  
[Diagram]
Moves 71 to 80  
[Diagram]
Moves 81 to 90  
[Diagram]
Moves 91 to 100  
[Diagram]
Moves 101 to 110  

At first it looks like B103 captures the 3 black stones, but after white a , black b, through to e, black is behind in the capturing race. I think the move does have an indirect effect of preventing the cut against the stones in the upper right corner.

[Diagram]
Moves 111 to 120  
[Diagram]
Moves 121 to 130  

At the end of this sequence, black has given up the black stones in the upper right for the 4 white stones in the center.

[Diagram]
Moves 131 to 140 (9 at 3)  
[Diagram]
Moves 141 to 150 (8 at 2)  
[Diagram]
Moves 151 to 160 (7 at 1)  
[Diagram]
Moves 161 to 170  
[Diagram]
Moves 171 to 180  
[Diagram]
Moves 181 to 190  
[Diagram]
Moves 191 to 200  
[Diagram]
Moves 201 to 210 (8 at 2)  
[Diagram]
Moves 211 to 220  
[Diagram]
Moves 221 to 230  
[Diagram]
Moves 231 to 240 (7 at 1) (10 at 4)  
[Diagram]
Moves 241 to 250 (9 at 3)  
[Diagram]
Moves 251 to 260  
[Diagram]
Moves 261 to 261  
[Diagram]
End position  

Does anyone else find it strange that white has won every game of the tournament so far? It seems the most important factor is nigiri!


11thNongshimCup/Stage 2 Game 2 last edited by emeraldemon on January 26, 2010 - 17:04
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