Life In 19x19

Posted: **Fri Oct 19, 2012 3:03 pm**

Lately my go has been getting worse rather than better, and I'm really not sure what I'm doing wrong. When I try to review I see tactical errors, but I those tend to be after I've already got myself in to a bad position and I can't see which moves brought that about. I decided to play and analyse a bunch of slow games to try and get myself back on track. This is the first of those. I've included some comments on where I think things went wrong.

Thanks for any help.

Posted: **Fri Oct 19, 2012 5:29 pm**

I made some comments, but don't trust them too much :p

Edit: By the way, free free to ask questions or point out mistakes

Posted: **Fri Oct 19, 2012 5:44 pm**

You had a decent game - maybe a won game up through move 122. At move 123 you made a classic mistake of attacking from a weak group. Just capture. Then you are strong. THEN attack.

Posted: **Fri Oct 19, 2012 5:47 pm**

Oh, by the way, forgot to mention that I confused who you are for the sequence around 60, but opted to keep most of my original comments because the basic ideas are still there.

Posted: **Fri Oct 19, 2012 6:29 pm**

To me, move 34 was a huge mistake. Perhaps 35 too? White should play in the top left, as you suggest. How to continue seems like an exciting question. My first feeling's the following.

Click Here To Show Diagram Code: [go]$$Bcm35 $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . X . . . | $$ | . . X , . . . 1 . O . . 2 . . , . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . 3 . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O X X X . X . . . . . . . . O . . | $$ | . X X X O O X . . . . . . . . . . . . | $$ | . O O O X O O X X X O . . . X , O . . | $$ | . . . . . . O O O X O . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ +---------------------------------------+[/go]

I agree with illluck (probably about everything) that 39 should be E10. Remember success for white isn't to live small in gote (or die big, as the case may be). A good result would be to limit/overconcentrate black and get a flexible shape. 40 here looks interesting to me (though it continues to seem hard for white to get a good result on the board after 33); none of the stones in and of themselves are important.

Click Here To Show Diagram Code: [go]$$Bcm39 $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . X . . . | $$ | . . X , . . . . . O . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . 2 X . . . . . . . . . . . . . . . . | $$ | . . O X . . . . . , . . . . . , . . . | $$ | . . . O 1 . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O X X X . X . . . . . . . . O . . | $$ | . X X X O O X . . . . . . . . . . . . | $$ | . O O O X O O X X X O . . . X , O . . | $$ | . . . . . . O O O X O . . . . . . . . | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ +---------------------------------------+[/go]

Posted: **Sat Oct 20, 2012 8:07 am**

Thanks everyone this is all really useful. Just a few questions.

Move 39: I just want to make sure I'm understanding the reasoning here. Is this bad because black's main goal here should be to build influence by attacking white's group (and white's is to stop that), and so the solid move is better than the more severe attack?

Move 49:

Illuck wrote:Black seems to kill with B8 instead.

Are you saying there was a sequence for white to live after B7, or that B8 is a better way to kill?

Illuck/Splatted wrote:This doesn't work well with the center as it's just begging white to cut. Maybe Q9? Not really sure how to convert this in to territory...

Not sure either, what about Q9 instead?

Were you asking why I suggested Q9 or suggesting it yourself?

Posted: **Sat Oct 20, 2012 11:25 am**

For move 39: The game move is not more severe - it gives white more cutting points to play around with. It's often better to play solid when you are trying to kill - your game move is more suitable if you don't want to kill and want to build outside.

Move 49: A cleaner kill probably - not sure if B7 kills, but it looks off to me just because it leaves more weaknesses and thus gives more chance for errors (the variation around move 60 would not have been an issue with B8).

Sorry, got confused there (reading numbers is hard, man XD). Yes, I was suggesting Q9 without realizing that was your suggestion as well, great minds think alike? :p

Posted: **Sat Oct 20, 2012 12:41 pm**

illluck wrote:For move 39: The game move is not more severe - it gives white more cutting points to play around with. It's often better to play solid when you are trying to kill - your game move is more suitable if you don't want to kill and want to build outside.

The exact opposite of what I thought... Orz

I'll take another look and see if I can see it. I'm actually pleased that I've now found something that seems to highlight one of my general problems rather than just a specific tactical error,

Thanks for all the help Illuck.

Posted: **Mon Oct 22, 2012 3:28 am**

Splatted wrote:
illluck wrote:For move 39: The game move is not more severe - it gives white more cutting points to play around with. It's often better to play solid when you are trying to kill - your game move is more suitable if you don't want to kill and want to build outside.

The exact opposite of what I thought... Orz

I'm about your rank, so don't take this as a teaching but:

I recently started thinking about those moments when I have to punish a too deep invasion in terms of "given stones". I concentrate on not making moves that allow the opponent to add free stones to the invasion; sublimated in preferring nobi to hane.

I have one chance to surround after each of my opponent moves, instead of once every two or three stones (the rest being responses to cuts and pokes).

In short, I now try to attack overvaluing aji and I'm getting good results.

Posted: **Mon Oct 22, 2012 11:32 am**

The capturing race after move 150 may be worth some discussion. This sort of position should be pretty easy to read out, but maybe a few pointers will help.

First, do *not* try the brute force method of mentally imagining "I play here, he plays there, ...". That gets very confusing very quickly. Instead, try to count liberties directly, without worrying about the order of moves.

(First digression -- the order of moves does matter if either side has a way to make eyes or to increase or decrease liberties. In this position, W has some forcing moves at Q16, but actually making an eye there costs W more liberties than it gains. Similarly, B can play around L15 but cannot make an eye or gain a liberty. So this is a straight capturing race.)

(Second digression -- there are two shared interior liberties, so seki is conceivable. We can come back to that if necessary, but first let's see if B can actually capture outright.)

W clearly has 7 liberties. Counting B liberties is slightly trickier. In order to capture, B needs to play moves at N19 and N15, so imagine those stones are already on the board. Now how many liberties does B have? The answer is 7 liberties. It might look like only 6, but to play those 6 moves, W needs an extra approach move (K19 to approach at the top or L15 to approach at the side). Since it is B to play, he should be able to capture W, simply by filling liberties.

In the game, B went astray at move 153, which did not gain a liberty for B or take away a W liberty. Counting after move 155, we see that now W has 6 liberties and B also has 6 liberties. (A B stone at N19 leaves 5 physical liberties plus one approach move.) Since it is now W to play, W wins the capturing race.

Posted: **Mon Oct 22, 2012 12:03 pm**

Alguien wrote:
I'm about your rank, so don't take this as a teaching but:

I recently started thinking about those moments when I have to punish a too deep invasion in terms of "given stones". I concentrate on not making moves that allow the opponent to add free stones to the invasion; sublimated in preferring nobi to hane.

I have one chance to surround after each of my opponent moves, instead of once every two or three stones (the rest being responses to cuts and pokes).

In short, I now try to attack overvaluing aji and I'm getting good results.

Thanks Alguien, that sounds like a really useful way of thinking about it.

Mitsun wrote:First, do *not* try the brute force method of mentally imagining "I play here, he plays there, ...". That gets very confusing very quickly.

That is exactly what I tried to do and I my brain just turned to mush. Thanks for showing me the light. :salute:

Posted: **Mon Oct 22, 2012 12:05 pm**

By the way, You guys did help me stop my downward spiral; I've won all three games I played since this one.

Edit: I of course immediately went and lost a game after posting this. :lol:

Posted: **Tue Oct 23, 2012 6:50 am**

Splatted wrote:By the way, You guys did help me stop my downward spiral; I've won all three games I played since this one.

Edit: I of course immediately went and lost a game after posting this.

One step forwards, two steps back.

Posted: **Tue Oct 23, 2012 7:48 am**

skydyr wrote:One step forwards, two steps back.

That's why I don't evaluate my Go strength by the strength of my strongest moves but by how bad are my worst.

Posted: **Wed Oct 31, 2012 2:44 pm**

mitsun wrote:W clearly has 7 liberties. Counting B liberties is slightly trickier. In order to capture, B needs to play moves at N19 and N15, so imagine those stones are already on the board. Now how many liberties does B have? The answer is 7 liberties. It might look like only 6, but to play those 6 moves, W needs an extra approach move (K19 to approach at the top or L15 to approach at the side). Since it is B to play, he should be able to capture W, simply by filling liberties.

I am interested in this approach, as currently I pretty much use the brute force method for situations like this. You mentioned imagining N19 and N15 are already on the board. How exactly does this work? Can you always do this in a capturing race and still count the correct number of liberties?

Thanks so much,
Euphony

Life In 19x19

Please help me stop my downward spiral...(5k vs 4k)

Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)

Re: Please help me stop my downward spiral...(5k vs 4k)