Life In 19x19

Posted: **Wed May 02, 2012 11:31 pm**

Boidhre wrote:I'd like to thank Ed and Bill especially for putting up with me this last while constantly putting up games and learning so little from the reviews, or at least being able to apply so little of what they've said to me in my games.

De nada.

It is all grist for the mill.

As a side point: Where you said I keep making that mistake Bill about which side to block in a 3,3 invasion: it's because really early on I was told to block on the wider side so I do it instinctively and don't account for local conditions enough when doing it. I hope, finally, the lesson has sunk in now but only time will tell.

Click Here To Show Diagram Code: [go]$$B Blocking on the wider side $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . B . 1 O . . | $$ | . . . , . . . . . , . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . X . . . . . , . . . . . , . . . | $$ | . . O 1 . . . . . X . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

The bottom left corner illustrates blocking on the wider side. The top right corner shows the mistake I was talking about. The mistake makes the :bc:

stone inefficient and fails to separate the White stones.

¿Es claro?

Posted: **Wed May 02, 2012 11:39 pm**

Bill Spight wrote:#
The bottom left corner illustrates blocking on the wider side. The top right corner shows the mistake I was talking about. The mistake makes the stone inefficient and fails to separate the White stones.

¿Es claro?

Very clear, I just never considered efficiency of stones explicitly until about a week ago.

Posted: **Wed May 02, 2012 11:59 pm**

Posted: **Thu May 03, 2012 12:14 am**

Thanks Ed, what do you mean by tight and loose?

Posted: **Thu May 03, 2012 12:17 am**

Boidhre wrote:Thanks Ed, what do you mean by tight and loose?

Good quesiton. Things to consider: liberties (yours and your opponent's), sente moves (yours and your opponent's), good and bad aji.
Maybe you can compare the two moves here as an exercise.

Posted: **Thu May 03, 2012 12:42 am**

EdLee wrote:
Boidhre wrote:Thanks Ed, what do you mean by tight and loose?
Good quesiton. Things to consider: liberties (yours and your opponent's), sente moves (yours and your opponent's), good and bad aji.
Maybe you can compare the two moves here as an exercise.

Hmm. The atari starts the ladder if they decide to nobi and effectively reduces the stone to one liberty. The net leaves it with two liberties and my group to the right with only one more. The net leaves a ko threat, so does the ladder I suppose but a lesser one. Aji, well I don't really understand that at all.

It's however two moves to kill the stone with the net and one with the atari which might be the difference between good and bad aji? I'm pretty tired so I could be all kinds of wrong here!

Posted: **Thu May 03, 2012 1:15 am**

You're doing fine. If you have Kageyama's Lessons in the Fundamentals of Go, it's in there somewhere.
(I have it, but not with me at the moment, so I cannot provide the page number.

)

The net also leaves 2 peeps for W.

Boidhre wrote:Aji, well I don't really understand that at all.

Think funny business.

Posted: **Thu May 03, 2012 3:06 am**

My try at reviewing your last game. I think that your fuseki is fine, trying to spot big moves is reasonable although you could work on it a bit. Especially try to focus on not doing "passing moves" and playing more games/doing tsumegos so that your reading ability improves a bit. But you are very strong 15k. :-)

Posted: **Thu May 03, 2012 4:39 am**

hermitek,

Posted: **Thu May 03, 2012 5:06 am**

EdLee wrote:hermitek,[hide]Some feedback for you (and Boidhre ),

sequence to move 13: In the game black has big moyo on the right side with almost no weaknesses in the top right. And although it could've been maybe executed a bit better, the idea and result was imho very good.
In your variant after b M16 and w N14 black has to worry about M16 stones and since there is white stone at R14, black group at P15 isn't really strong either.

move 27: OK.

Posted: **Thu May 03, 2012 6:11 am**

hermitek wrote:
EdLee wrote:hermitek,[hide]Some feedback for you (and Boidhre ),

sequence to move 13: In the game black has big moyo on the right side with almost no weaknesses in the top right. And although it could've been maybe executed a bit better, the idea and result was imho very good.
In your variant after b M16 and w N14 black has to worry about M16 stones and since there is white stone at R14, black group at P15 isn't really strong either.

move 27: OK.

Some food for thought on Ed's move 13 sequence.

In the game variation, Black allows White to get onto the 4th line and starts pushing him from behind - sure, it keeps a good wall facing the right hand side, but not only has White got very reasonable territory, the D16 stone allows White to expand nicely along the top edge.

In Ed's variation, White's attempt to resist gives Black a little more complications to consider, but gives White at least as many. Firstly, White's corner is a lot smaller, and secondly, White's N15 stone risks becoming a burden. If he extends to N14, Black can play P13 (O13 instead may be ok to resist White responding wO13 bP12 wN11, but it does allow for cut complications, and White's simply securing 5th line territory for Black anyway, so Black can't complain). Now, after bP13, White not only has to look after N15 else Black's moyo potential grows considerably (and so doesn't have time to play K16/K17), but he also has to accept that with once Black settles across the top, White has no development potential and no weak Black groups to harrass.

I'd certainly play Ed's variation every time