#185 EdLee vs. The Intrepid: The Swords

skydyr · Post by **skydyr** » Tue Dec 11, 2012 8:19 pm

@The Intrepid

The Intrepid · Post by **The Intrepid** » Tue Dec 11, 2012 8:20 pm

EdLee made his move quickly. Interesting. Either he anticipated :b15:

or else he played his move by instinct. He had various moves to choose from, however. In any case, what he played is natural and good. I'll take a little bit of time to consider a few options I now have but I will likely play the following move, expecting the indicated sequence:

Click Here To Show Diagram Code: [go]$$Bcm17 $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . O . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . . . . . . . . . . . . . 1 O . . | $$ | . . . , . . . . . , . . . . . 2 3 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

The Intrepid · Post by **The Intrepid** » Tue Dec 11, 2012 8:21 pm

skydyr wrote:@The Intrepid
I noticed you discussed a lot of options, but not your last move. What lead you to choose it?

skydyr · Post by **skydyr** » Tue Dec 11, 2012 8:23 pm

observers

The Intrepid wrote:In addition to all the above options, Lee Sedol played "f" in one game, taking the corner right away. The exact situation on the board was this:
$$Bc
$$ -----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . 1 . . |
$$ | . . . O . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . . . . . . . . . . . . . O . W . . |
$$ | . . . . . . . . . . . . . . X O B B . |
$$ | . . . X . . . . . , . . . . X , . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ -----------------------------------------

Click Here To Show Diagram Code
[go]$$Bc $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 1 . . | $$ | . . . O . . . . . , . . . . . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . O . W . . | $$ | . . . . . . . . . . . . . . X O B B . | $$ | . . . X . . . . . , . . . . X , . . . | $$ | . . . . . . . . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]
Black already has the bottom-right corner which could be an important factor why Lee Sedol might have thought it was all right to take the top-right corner in exchange for additional White influence toward the right side.

I think black is fine with white building influence on the right, because the marked black stones are low, so black has good reducing moves to use against white later on. Does anyone else have an opinion?

The Intrepid · Post by **The Intrepid** » Tue Dec 11, 2012 8:49 pm

Click Here To Show Diagram Code: [go]$$Bm17 $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . O . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . . . . . . . . . . . . . 1 O . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

EdLee · Post by **EdLee** » Tue Dec 11, 2012 9:10 pm

The Intrepid · Post by **The Intrepid** » Tue Dec 11, 2012 9:12 pm

Comments regarding :w14:

:

The Intrepid · Post by **The Intrepid** » Tue Dec 11, 2012 9:34 pm

Comments regarding :b15:

The choices available to me were to tenuki or to play one of the following:

Click Here To Show Diagram Code: [go]$$Wc $$ ----------------- $$ . . . . . . . . | $$ . . . . . . . . | $$ . . . . . . . . | $$ . . O . O c d . | $$ . . . . . . . . | $$ . . . . . X . . | $$ . . . X . . . . | $$ . . . . b O . . | $$ . . . . a . . . | $$ . . . . , . . . | $$ . . . . . . . . |[/go]

I decided to hold off on choosing between "c" or "d" until the situation below clarifies a bit. I believe both "a" and "b" are possible in the given situation. With "b," my intention is to reduce White's territory on the side in sente, obtain a safe group there, ideally limit White's potential on top, and then proceed with cultivating my territory on the bottom. Specifically, the following would be a sequence very much to my liking:

Click Here To Show Diagram Code: [go]$$Wc $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . O . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . X . 8 . . | $$ | . . . . . . . . . . . . . . . X O 0 . | $$ | . . . . . . . . . . . . . . . X O 9 . | $$ | . . . , . . . . . , . . . . 6 1 2 4 . | $$ | . . . . . . . . . . . . . . . 7 3 5 . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

Click Here To Show Diagram Code: [go]$$Wcm11 $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . 8 . . 4 . . 2 . . . . 7 0 . | $$ | . . . O . . . . . , . . . O . O . 6 . | $$ | . . . . . . . . . . . . 3 . . . . . . | $$ | . . 9 . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . 5 . X . X . . | $$ | . . . . . . . . . . . . . . . X O X . | $$ | . . . . . . . . . . . . . . . X O O . | $$ | . . . , . . . . . , . . . . . O C C 1 | $$ | . . . . . . . . . . . . . . . . O O . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . e O . . . . | $$ | . . . . . . . . . . . . . . X O f . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

Next, "e" or "f" for Black would be huge.

:b12:

could also be the following:

Click Here To Show Diagram Code: [go]$$Wcm11 $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 3 . . | $$ | . . . O . . . . . , . . . O 5 O 2 . . | $$ | . . . . . . . . . . . . . . . 4 . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . X . X . . | $$ | . . . . . . . . . . . . . . . X O X . | $$ | . . . . . . . . . . . . . . . X O O . | $$ | . . . , . . . . . , . . . . . O C C 1 | $$ | . . . . . . . . . . . . . . . . O O . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . 9 7 . O . . . | $$ | . . . . . . . . . . . 0 8 6 O . . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

Of course, these are hardly the only options for either side.

Edit:

EdLee · Post by **EdLee** » Tue Dec 11, 2012 10:04 pm

Click Here To Show Diagram Code: [go]$$Wm18 $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . O . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . , . . . . . , . . . . . , 1 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

If

hane instead of :w18:

extend, here's one variation where B makes good shape with a series of sente moves:

Click Here To Show Diagram Code: [go]$$W $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . O . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . X . 8 . . | $$ | . . . . . . . . . . . . . . . X O 0 . | $$ | . . . . . . . . . . . . . . . X O 9 . | $$ | . . . , . . . . . , . . . . 6 1 2 4 . | $$ | . . . . . . . . . . . . . . . 7 3 5 . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

The Intrepid · Post by **The Intrepid** » Tue Dec 11, 2012 10:09 pm

The Intrepid · Post by **The Intrepid** » Tue Dec 11, 2012 11:24 pm

Comments regarding :w16:

Comments regarding :b17:

:

The Intrepid · Post by **The Intrepid** » Tue Dec 11, 2012 11:51 pm

Comments regarding :w18:

:

On the one hand, EdLee's move seems to lack ambition, willingly accepting 3rd line territory. On the other hand, if he played on the 4th line and I cut, I could hope to get important shape points at :b6:

and

in sente:

Click Here To Show Diagram Code: [go]$$Wc $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . O . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . X . 8 . . | $$ | . . . . . . . . . . . . . . . X O 0 . | $$ | . . . . . . . . . . . . . . . X O 9 . | $$ | . . . , . . . . . , . . . . 6 1 2 4 . | $$ | . . . . . . . . . . . . . . . 7 3 5 . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

The possible responses I am thinking about currently are these:

Click Here To Show Diagram Code: [go]$$Wc $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . e . . . . . . . | $$ | . . . O . . . . . , f . . O . O c d . | $$ | . . . . . . . . . . . . . . b . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . , . . . . . , . . . . . a O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . g O . . . . | $$ | . . . . . . . . . . . . . . X O h . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

"a" would seek to further reduce White's territory, but I am not sure if it is sente.

"b" would improve Black's shape at the cost of eliminating some of the aji in White's shape. I need to make sure, however, that White actually has to respond at P16.

"c" is tempting, but the following variation gives me pause:

Click Here To Show Diagram Code: [go]$$Bc $$ ----------------- $$ . . . . . . . . | $$ . . . . . . . . | $$ . . . . . . . . | $$ . . O . O 1 . . | $$ . . . . 2 3 . . | $$ . . . . 4 X . . | $$ . . . X . . . . | $$ . . . . X O . . | $$ . . . . X O . . | $$ . . . . , O . . | $$ . . . . . . . . | $$ . . . . . . . . | $$ . . . . O . . . | $$ . . . O . . . . | $$ . . . X O . . . | $$ . . . X , . . . | $$ . . . . X . . . | $$ . . . . . . . . | $$ . . . . . . . . | $$-----------------[/go]

My stones get cut and the situation becomes chaotic. I am not sure that I would be able to correctly handle the consequences.

"d" is the safe way to reinforce the Black stones. However, perhaps I should first exchange other moves before playing here.

"e" and "f" are moves that would seek to prevent White from expanding on the top side. However, before playing these moves, I first need to understand why either of them is sente, which apparently they are.

"g" seeks to register a profit from the reduction of White's moyo on the right. However, if played immediately, my stones on the right could fall under attack.

"h" is similar to "g" but aims to threaten White's territory. This is a huge point, but "g" seems bigger right now, especially since I already extended to the left on move 3:

Click Here To Show Diagram Code: [go]$$Bc $$ . . . . . . . . . . . . . | $$ . . . . . . . . . O . . . | $$ . . . . . . . g O . . . . | $$ . . . . . . . . X O h . . | $$ . . . , . . . . X , . . . | $$ . . B . . . . . . X . . . | $$ . . . . . . . . . . . . . | $$ . . . . . . . . . . . . . | $$ --------------------------[/go]

Therefore, I have yet another tough choice to make.

I think I'll need to sleep on this one.

Edit:

The Intrepid · Post by **The Intrepid** » Thu Dec 13, 2012 4:08 am

Click Here To Show Diagram Code: [go]$$Bm19 $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . O . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . , . . . . . , . . . . . 1 O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

First of all, mental note to self: when confronted with a close-low pincer, double approach the corner or invade the corner directly--don't jump. Otherwise, this happens. I get "influence" which, in fact, is little more than a heavy group of stones one step away from the grave.

Anyway, I managed to convince myself that :b19:

is actually sente. This is important because my group will be much stronger after the following exchange:

Click Here To Show Diagram Code: [go]$$Bc can be at "a," as well. $$ ----------------- $$ . . . . . . . . | $$ . . . . . . . . | $$ . . . . . . . . | $$ . . O . O . . . | $$ . . . . . . . . | $$ . . . . . X . . | $$ . . . X . . . . | $$ . . . . X O . . | $$ . . . . X O . . | $$ . . . . 1 O . . | $$ . . . . . 2 . . | $$ . . . . . a . . |[/go]

If EdLee ignores my move, this could follow:

Click Here To Show Diagram Code: [go]$$Bc $$ ----------------- $$ . . . . . . . . | $$ . . . . . . . . | $$ . . . . . . . . | $$ . . O . O . . . | $$ . . . . . . . . | $$ . . . . . X . . | $$ . . . X . . . . | $$ . . . . X O . . | $$ . . . . X O . . | $$ . . . . X O . . | $$ . . . . . 1 2 . | $$ . . . . . 3 4 . | $$ . . . . W 5 . . | $$ . . . W . . . . | $$ . . . X W . . . | $$ . . . X , . . . | $$ . . . . X . . . | $$ . . . . . . . . | $$ . . . . . . . . | $$-----------------[/go]

Marked group becomes weak.

Alternatively, I could also consider this:

Click Here To Show Diagram Code: [go]$$Bc $$ ----------------- $$ . . . . . . . . | $$ . . . . . . . . | $$ . . . . . . . . | $$ . . O . O . . . | $$ . . . . . . . . | $$ . . . . . X . . | $$ . . . X . . . . | $$ . . . . X O . . | $$ . . . . X O . . | $$ . . . . X O 6 . | $$ . . . . 5 1 2 . | $$ . . . . . 4 3 . | $$ . . . . O . . . | $$ . . . O . 8 0 . | $$ . . . X O 7 9 . | $$ . . . X , b . . | $$ . . . . X . . . | $$ . . . . . . . . | $$ . . . . . . . . | $$-----------------[/go]

This allows me to take the corner in sente ... kind off. In the final position White threatens "b," although it's not sente, yet.

In any case, after either variation, my group on the right side should become strong enough to warrant an attack against White's top-right corner. Incidentally, some professionals in a similar situation didn't care about reinforcing their group further and just attacked the corner straight away. For example, in Kobayashi Koichi vs. Yo Kaei, 2008, play continued as follows:

Click Here To Show Diagram Code: [go]$$Bcm25 $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . 7 . . . . | $$ | . . . . . . . . . . . . . . . . 1 5 . | $$ | . . . X . . . . . , . . . O . O 2 3 . | $$ | . . . . . . . . . . . . . . . . 6 4 . | $$ | . . . . . . . . . . . . . . X . X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . , . . . . . , . . . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . O . | $$ | . . . . . . . . . . . . . . . O O . O | $$ | . . O . . . . . . . . . . . . X X O . | $$ | . . . , . . . . . , . . . . X , O X . | $$ | . . . X . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

It's amazing to me that it's possible to play like this.

EdLee · Post by **EdLee** » Fri Dec 14, 2012 12:22 am

Click Here To Show Diagram Code: [go]$$Wm20 $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . O . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . , . . . . . , . . . . . X O . . | $$ | . . . . . . . . . . . . . . . . 1 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

If

hane, B probably can get another sente move?

Click Here To Show Diagram Code: [go]$$W Variation 1 $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . O . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . , . . . . . , . . . . . X O 5 . | $$ | . . . . . . . . . . . . . . 6 1 2 4 . | $$ | . . . . . . . . . . . . . . . 7 3 . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

Click Here To Show Diagram Code: [go]$$W Variation 2 $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . O . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . , . . . . . , . . . . . X O . . | $$ | . . . . . . . . . . . . . . 2 1 . . . | $$ | . . . . . . . . . . . . . . . 3 . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

The Intrepid · Post by **The Intrepid** » Fri Dec 14, 2012 1:56 am

OK, now comes the hard part. Do I tenuki to take territory at "a"; do I launch an attack against the top-right corner at "b" or "c"; do I play "d" in hopes that White replies passively at "c"; do I jump out from my central group to one of the "e" intersections; or do I try to further strengthen my group at "f," aiming at "c" or "g"? :study:

Click Here To Show Diagram Code: [go]$$Wc $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . b . . . . c . . | $$ | . . . O . . . . . , . . . O . O g d . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . e . . . . X . . | $$ | . . . . . . . . . . . e . . X . f . . | $$ | . . . . . . . . . . . e . . . X O . . | $$ | . . . . . . . . . . . e . . . X O . . | $$ | . . . , . . . . . , . . . . . X O . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . a O . . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . , . . . . . , . . . . X , . . . | $$ | . . X . . . . . X . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

Incidentally, in comparison to the usual shape here, the game structure has two main differences. "i" is normally bad aji for Black and "j" is bad aji for White.

Click Here To Show Diagram Code: [go]$$Wc $$ ----------------- $$ . . . . . . . . | $$ . . . . . . . . | $$ . . . j . . . . | $$ . . O . O . . . | $$ . . . . . . . . | $$ . . . B . X . . | $$ . . . . i . . . | $$ . . . . X O . . | $$ . . . . X O . . | $$ . . . . X O . . | $$ . . . . . O . . | $$ . . . . . . . . |[/go]

By contrast, the severity of these aji is much smaller in the game position.

Click Here To Show Diagram Code: [go]$$Wc $$ ----------------- $$ . . . . . . . . | $$ . . . . . . . . | $$ . . . j . . . . | $$ . . O . O . . . | $$ . . . . . . . . | $$ . . . . . X . . | $$ . . . B i . . . | $$ . . . . X O . . | $$ . . . . X O . . | $$ . . . . X O . . | $$ . . . . . O . . | $$ . . . . . . . . |[/go]

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Life In 19x19

#185 EdLee vs. The Intrepid: The Swords

Re: #185 EdLee vs. The Intrepid: The Swords

Re: #185 EdLee vs. The Intrepid: The Swords

Re: #185 EdLee vs. The Intrepid: The Swords

Re: #185 EdLee vs. The Intrepid: The Swords

Re: #185 EdLee vs. The Intrepid: The Swords

Re: #185 EdLee vs. The Intrepid: The Swords

Re: #185 EdLee vs. The Intrepid: The Swords

Re: #185 EdLee vs. The Intrepid: The Swords

Re: #185 EdLee vs. The Intrepid: The Swords

Re: #185 EdLee vs. The Intrepid: The Swords

Re: #185 EdLee vs. The Intrepid: The Swords

Re: #185 EdLee vs. The Intrepid: The Swords