Kirby's Study Journal

Kirby · Post by **Kirby** » Fri Jan 03, 2014 9:21 am

Today I had the honor of playing a Korean professional, Son Keungi 4d.

It was an internet game on Tygem at 10:30pm Korean time, which meant that I had to be ready by 5:30am. This is earlier than I usually get up, and I was exhausted. I should have gone to bed earlier.

The time settings were pretty quick - 5 minute game, plus 3 periods of 30 second byo-yomi. Combined with being tired, I played a pretty bad game, making some very silly mistakes. I lost by a lot, but it was still a great experience to play a pro.

I'm slighty embarrassed to post the game record since I played so poorly and without much thought, but after the game he kindly provided review, and I also reviewed the game a bit myself.

Here's the SGF:

Kirby · Post by **Kirby** » Fri Jan 03, 2014 10:00 am

Key Blunders

I made some quick plays that I should have thought more about. I should have pushed harder to think hard and win. Here are a couple of key points where I made mistakes that I know better than to make:

Position 1

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

This cut was reckless. I didn't read a way to make it effective, so I shouldn't play it. I guess I played here on instinct.

Position 2

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

The pro didn't comment on this move much, but this was a move without thought, and I immediately regretted playing it. It was a bad move. Some spectators suggested the marked intersection, and of course, without playing this, I have the double peep.

Position 3

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

Above is a terrible threat, which just loses points. I should know better!

Position 4

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

Of course I should have played at the marked spot. It's obvious that if white disconnects black, he can make two eyes. I have no idea why I missed this - maybe because I was playing a pro... Maybe because I was tired... But still, I shouldn't have an excuse for playing this kind of move.

Learning Points

* Even when I am tired or lacking time, I *must* think. Otherwise, the moves become pointless and regrettable
* In life & death scenarios, spend a little bit of time reading
* I need to do more go problems

yoyoma · Post by **yoyoma** » Fri Jan 03, 2014 1:36 pm

How did this match with a pro on tygem get setup? I think I've seen some stuff written about matches with pros but I didn't pay close attention to the details.

Kirby · Post by **Kirby** » Sun Jan 05, 2014 9:55 pm

yoyoma wrote:How did this match with a pro on tygem get setup? I think I've seen some stuff written about matches with pros but I didn't pay close attention to the details.

We spoke offline.

Kirby · Post by **Kirby** » Sun Jan 05, 2014 10:00 pm

Today was the Jin Chen Memorial Tournament in Seattle. Jin Chen was a great guy, and this tournament is typically the biggest go tournament at the Seattle Go Center every year. This was the first opportunity I had to go, so I was excited to play. I arrived at the center early, and there were already a handful of people there. The turnout was great, and I was surprised they had enough go boards to facilitate all of the players.

My first game was against a go center regular. I've played him casually before, and he's a nice guy. The one time we played earlier, he gave me a two stone handicap and I won, but today we were matched up to play with no handicap, but with 0.5 komi. It was our first game without handicap stones, so it felt exciting.

I found out in the middle of the game that we were using Canadian time. I'm typically used to byo-yomi, so this was a bit of a challenge.

In the end, I lost the game by running out of time, but on the board, I would have lost because he killed a group of mine. On the other hand, maybe I would not have played tenuki if I weren't short on time.

Either way, I lost, and here's the SGF:

There are a number of learning points in this game.

Kirby · Post by **Kirby** » Sun Jan 05, 2014 10:10 pm

Learning Points

Position 1

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

In the game I played the marked move. I didn't expect to capture the stone, but I wanted influence to aid in the development of the bottom right. This stone ended up being one that was captured, so I'm not sure it makes sense to have been played. If I wanted influence and that's all I wanted, maybe a more direct approach is better:

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

I don't know how white will respond, but the way above gives a move more at the purpose of what I'm trying to achieve, and will likely allow me to get sente to play a big point like the one on the right.

Position 2

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

This is almost a wasted move. Why play this move?

Position 3

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

I think this is the wrong direction. I should hane on the other side:

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

Position 4

It was not acceptable to allow white to get sente to play here:

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

I should have read so that I was 100% sure I could kill white, or I should have found a way to get sente. Black was strong in the bottom right, and to let white live in sente is like a slap in the face.

Kirby · Post by **Kirby** » Sun Jan 05, 2014 10:12 pm

Some general ideas that I can learn from based on these last positions:

1.) Play a move that accomplishes the purpose I want to accomplish cleanly. Don't play something vague that doesn't do exactly what I want it to do.
2.) Use good direction in fighting.
3.) Work harder to get sente when I should get it.

yoyoma · Post by **yoyoma** » Sun Jan 05, 2014 10:51 pm

What about move 17 Black H3 instead of H7?

Black 51 I would play R9 or R10 to steal his eye space instead. Let him run to the center towards your stones. They aren't all that thick but probably you will have a chance to fix J7 and have it also serve as an attacking move.

Similar for Black 59 I would reduce eye space at S5.

Shaddy · Post by **Shaddy** » Mon Jan 06, 2014 12:11 am

C14 IS MASSIVE. I don't know if I'd tenuki a 4-4 approach to get it, but I definitely would have played it after that sequence.

Kirby · Post by **Kirby** » Mon Jan 06, 2014 8:55 pm

yoyoma wrote:What about move 17 Black H3 instead of H7?

Great idea. I don't know why, but I don't recall even considering this move in the game. Maybe it was the pressure of being in a tournament? I think H3 is a better idea than H7.

yoyoma wrote: Black 51 I would play R9 or R10 to steal his eye space instead. Let him run to the center towards your stones. They aren't all that thick but probably you will have a chance to fix J7 and have it also serve as an attacking move.

Sounds like a good idea, but do you think black will get enough compensation? I guess in the game I didn't kill him anyway since he had eyespace, so I didn't get as much compensation as I wanted, but maybe I could get center influence.

How do you decide between trying to seal in from above and pushing eyespace below? Because black already has some stones on the outside?

yoyoma wrote: Similar for Black 59 I would reduce eye space at S5.

This I can see more clearly. It's probably better than in the game. I could probably get sente to play around Q18, for example.

Kirby · Post by **Kirby** » Mon Jan 06, 2014 8:57 pm

Shaddy wrote:C14 IS MASSIVE. I don't know if I'd tenuki a 4-4 approach to get it, but I definitely would have played it after that sequence.

I guess this is evidence that I still don't understand this sequence that well (though, I don't know of a better way to respond to this type of pincer that well, either). I guess C14 has the benefit of protecting the cut, and it's also good territorially.

It's hard for me to assess how big this is.

Kirby · Post by **Kirby** » Tue Jan 07, 2014 4:21 pm

Following previous practice of taking a look at a pro game and guessing the moves, here's a game record with my comments between Cho Hunhyun and Park Jungsang.

I guess Park Jungsang looks like this:

Here's the SGF:

Kirby · Post by **Kirby** » Tue Jan 07, 2014 4:35 pm

Selected Differences Between Pro and Kirby Thought

Position 1

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

I didn't consider the marked move, but I think it's good. I considered this:

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

and this:

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

The thing is, both of these help white to fix his three space extension nicely, making it stronger:

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

For this reason alone, I like his choice better.

Position 2

Just a few moves later, black played this:

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

My instinct is to play here:

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

Because I don't like black's shape when white hane's under. But this is gote, leaves the cut for white to exploit, and further, white doesn't want to necessarily hane, since it hurts his stones:

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

Position 3

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

Black opted to move out his stones, whereas my instinct was to grab corner territory:

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

My idea is bad, because those stones are important - have to keep two white groups weak!

Position 4

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

Now it's time to take territory, but my idea was to play here:

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

This is reckless, because white can get into the bottom, and also it's hard for black to attack severely with his semi-weak group floating in the center right.

Overall Thoughts

My thoughts differed from pro in several regards, but if I summarize, I think I misevaluated how to deal with the relative strengths of groups several times:
* I was concerned about corner shape when white would not exploit it anyway since it'd hurt his weak group.
* I thought about moves to move out of top right corner, which helped white strengthen his weak group.
* I thought about making territory when black needed to keep white's groups weak.
* I tried to attack when I have kind of weak group.

I think lesson from this game is to pay attention to what groups are weak and what groups are strong, and what implications that has on game. This sounds obvious, but clearly I do not understand it.

Shaddy · Post by **Shaddy** » Wed Jan 08, 2014 1:19 am

@magic sword comments:

1. The corner is gigantic and thick. It's nice to have that big territory, and the only potential left in that area is a (not particularly good) peep.

2. If you don't protect the cut, there will be a ladder. Modern pros sometimes disregard honte, but they almost never leave ladders on the board.

Kirby · Post by **Kirby** » Wed Jan 08, 2014 4:42 pm

Shaddy wrote:@magic sword comments:

1. The corner is gigantic and thick. It's nice to have that big territory, and the only potential left in that area is a (not particularly good) peep.

2. If you don't protect the cut, there will be a ladder. Modern pros sometimes disregard honte, but they almost never leave ladders on the board.

I can see your point on both comments. It's not helpful in knowing exactly *how* big this is, but I guess the point is, it's very big, and like you said, maybe I should come back and play it after the sequence in the top right.

Life In 19x19

Kirby's Study Journal

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Re: Kirby's Study Journal

Re: Kirby's Study Journal

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Re: Kirby's Study Journal

Re: Kirby's Study Journal

Re: Kirby's Study Journal