How could I have recognized this?

Xezlec · Post by **Xezlec** » Sat Dec 17, 2011 2:04 pm

Hello! This is my first post. I'm a total beginner. I've always wanted to be somewhat competent at a board game. I thought Go would be a good one to try. But I keep losing to my phone, humiliatingly enough. Here's an example of my latest game against it:

Click Here To Show Diagram Code: [go]$$c My (black's) turn $$ --------- $$|...O.OX..| $$|b.YO.OX..| $$|..YOOXX..| $$|.aYYO....| $$|.OOYO.O..| $$|.OXOOO.O.| $$|.OXXXXXX.| $$|.X.......| $$|.........| $$ ---------[/go]

I was all proud of myself for using a series of forcing moves to get the board into this position and still have sente, and I moved at a and then my triangle-marked group got killed to death hard. I couldn't understand how that happened, because I thought I was doing good.

I spent a long time playing out variations against the phone, and the phone managed to kill my group every time. Finally, after more time spent at it than makes any sense, I found move b. This move wins the game. But how could I have ever seen that that is such a great move without playing variations for half an hour? It doesn't look particularly special to me compared to all the other moves. And how could I have seen how dangerous this position really was for me? I had thought I was in great shape.

RBerenguel · Post by **RBerenguel** » Sat Dec 17, 2011 2:10 pm

Hi Xezlec,

experience comes at a point

the 1-2 point (or 2-1? I always get it wrong

) is a special point, and usually for this kind of shapes is like an "eye creator". To be more effective at spotting this kind of things, experience is a must! After a while you tend to recognize which shapes can get two eyes and which only get one (see here: http://senseis.xmp.net/?nakade). Slowly you'll get your hang of what makes you live and what not, and this will make you improve steadily. Don't despair!

Xezlec · Post by **Xezlec** » Sat Dec 17, 2011 2:25 pm

Ohhh! I had read the thing about 6 in the corner and its critical point before but I wasn't thinking about it like that. Now I can see what you mean: that's the shape it was going to end up as, so I should have been planning ahead to that. Thanks!

RBerenguel · Post by **RBerenguel** » Sat Dec 17, 2011 2:29 pm

Thanks for coming to ask! If you start recognizing which shape you end up, and how this shape lives or dies you'll improve a lot! (and I've always found the 6 space eye as one of the hardest, by the way!)

xed_over · Post by **xed_over** » Sat Dec 17, 2011 2:32 pm

look up Vital Point: http://senseis.xmp.net/?VitalPoint

recognizing the vital point comes with lots of practice and recognizing common shapes. Practice lots of tsumego (life and death)

jts · Post by **jts** » Sat Dec 17, 2011 2:33 pm

Xezlec wrote:Ohhh! I had read the thing about 6 in the corner and its critical point before but I wasn't thinking about it like that. Now I can see what you mean: that's the shape it was going to end up as, so I should have been planning ahead to that. Thanks!

I'm curious, what resistance did white find that made A fail? (I can see one or two lines that might be tricky for black, but I would play A myself.)

hyperpape · Post by **hyperpape** » Sat Dec 17, 2011 2:35 pm

Well, take solace in this: I want to play a as well. I think it should actually kill.

tj86430 · Post by **tj86430** » Sat Dec 17, 2011 2:39 pm

I too have trouble seeing why a would lose.

RBerenguel · Post by **RBerenguel** » Sat Dec 17, 2011 2:41 pm

Looking very quickly at it, doesn't it end in seki or bent four?

xed_over · Post by **xed_over** » Sat Dec 17, 2011 2:45 pm

RBerenguel wrote:Looking very quickly at it, doesn't it end in seki or bent four?

only if the 4 white stones at b4 live

jts · Post by **jts** » Sat Dec 17, 2011 2:45 pm

RBerenguel wrote:Looking very quickly at it, doesn't it end in seki or bent four?

B5 is deader than chris hitchens

RBerenguel · Post by **RBerenguel** » Sat Dec 17, 2011 2:46 pm

Too quickly

I'm watching soccer on TV, as disclaimer

speedchase · Post by **speedchase** » Sat Dec 17, 2011 3:19 pm

What is the sequnce for white to kill after a?

Xezlec · Post by **Xezlec** » Sat Dec 17, 2011 4:14 pm

jts wrote:I'm curious, what resistance did white find that made A fail? (I can see one or two lines that might be tricky for black, but I would play A myself.)

Darn it, I don't remember. I may have just made a silly mistake and then backtracked right away without looking closely enough. I know at least one of the ways I tried it, white played at the point immediately to the right of b. This move made it really hard for me to do anything, because he could connect to the group at the top if I didn't block that. That might not have been the time I started out by playing at a though. Sorry.

Xezlec · Post by **Xezlec** » Sat Dec 17, 2011 4:26 pm

OK, I think this is what happened.

Click Here To Show Diagram Code: [go]$$c $$ --------- $$|.63O.OX..| $$|.2XO.OX..| $$|84XOOXX..| $$|71XXO....| $$|5OOXO.O..| $$|9OXOOO.O.| $$|0OXXXXXX.| $$|.X.......| $$|.........| $$ ---------[/go]

Life In 19x19

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