What does "natural" mean in go?

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Re: What does "natural" mean in go?

Post by Elom »

jlt wrote:It's hard to say if go knowledge is more "textlike" or "imagelike". It's imagelike because we use visual memory to remember shapes, josekis, etc. but it's textlike because we need to pay attention to every detail. So for the moment we don't know if all of LZ157's knowledge can fit into a human brain, maybe, maybe not.
Having just been pondering on this idea, it seems that go, like language, sits between sound and vision.
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Re: What does "natural" mean in go?

Post by dangomango »

well probing corner enclosures was "natural"
now it becomes "natural" to attach to non enclosed corners

there are logic/reasoning behind those AI moves...but it seems it becomes to complicated for amateurs to fully understand and utilize in our strategies
like 3-3 invasion immediately, the logic is trying to grab territory in sente and can easily reduce the influence gained by opponent's wall.....and then a counter to this was invented by tenuki in sente vs you get 3-3 + territory in gote
then it becomes joseki because it seems to be even for both sides

then all kinds of craziness like this happens again and again...

any unnatural circumstances can become natural once you repeat something again and again
it takes time to adapt
but anyhow, im pretty sure old school players will stick to the old school style unless they are willing to change and learn
younger ppl(children especially) will adapt to new joseki/fuseki/style much more easily that it will become "natural
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Re: What does "natural" mean in go?

Post by golem7 »

I think the term "natural" is to be understood in the context of instinct and conditioning and can have as many different meanings as there are go players on the planet. So when Takemiya uses it, it is something completely different from when I or anyone on this forum uses it to describe a move, because it is inherently connected to our past experience.

I think there is a relation to strength in the sense that the more you have studied the game, the more you will have exchanged information with others, and the more aligned your instinct becomes to the consensus of the overall (stronger) go population. But as AI is teaching us, established conventions/instincts might not necessarily be superior, but could be like a local (or maybe temporal) optimum which hasn't been questioned out of complacency for a long time.

Reversely, I was just reminded some time ago what "unnatural" feels like as I felt my toenails curling around when watching 2 DDKs duke it out next to me in a bar. ;)

The criticism of blindly imitating pro's/AI's moves always felt invalid to me. Any learning process starts with imitation, understanding only comes later. This will always be true IMHO and is no cause for concern.

However it's hard to say what that means for the future. Will we accept AI as a guide/teacher for best play? Well, sure seems like it, heck I do it myself and gladly to boot. I think my direction of play has improved markedly since reviewing with Leela. I think the go population in general has become stronger in the last few years while digesting the new ideas and will still become much stronger. Maybe we don't feel it as much because we improve all together so the relation stays the same.

As a final thought: even in case of the most "boring" outcome in that we accept AI's instincts as a measure for move quality in the future and adapt to that standard, it will still mean a big increase in human go strength (I think Leela is about mid-dan strength without reading at all!). After that, it all comes down to reading anyway which is and always has been the single biggest indicator of playing strength. Go has infinite variations after all so no matter what we will continue to encounter new positions, new challenges and will have to find our own way with our own strength.
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Knotwilg
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Re: What does "natural" mean in go?

Post by Knotwilg »

I have an example:
Click Here To Show Diagram Code
[go]$$W White to play
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . . . . . . . O . . . . . |
$$ | . . O . . . . . X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
I was White in this game. Black has just reinforced his upper right corner.

In this position, there is a very natural move for me to play, one that I have acquired by book study and play, but I have learnt from studying with Leela it is not a good move.

Instead, LZ suggests another move (and one other close by) which gives a 65% advantage. My move is not considered, though the advantage only drops to 62% if I play it. Anyway, this very natural move is not in LZ's repertoire, for reasons I now understand conceptually but it still feels awkward.

Can you guess my "natural move" and Lizzie's preference?
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jlt
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Re: What does "natural" mean in go?

Post by jlt »

What is natural for a dan player or for LeelaZero is often different than what is natural for me, but I'll try anyway.
Click Here To Show Diagram Code
[go]$$Wc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . . . . . . . O . . . . . |
$$ | . . O . . . . . X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . Y . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . a . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . b . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
I don't see any natural local good response to P18 so I would tenuki.

"a" is a standard shape move which attacks the triangled stone, thanks to the C14-D13 stones. If Blacks answers with B7, this will help to get white stones in the center and reduce Black's moyo.

Or maybe cap at "b" to reduce Black's moyo, and if White gets stronger in the center, the F17 stones could be attacked later.
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Re: What does "natural" mean in go?

Post by dfan »

The two main features of the position that I notice are 1) Black is close to completing a big moyo on the bottom (even with White poking into it at F3) and 2) Black's upper left group is weak.

So my first instinct is to attack that group of Black's (e.g., capping at J12), with the idea of making enough strength to erase Black effectively with something like a paratrooper at K6.
Uberdude
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Re: What does "natural" mean in go?

Post by Uberdude »

No one move strikes me as particularly obvious or natural here. If white's previous move was the o13 jump, expecting/hoping for black to answer at q/p12 but instead black tneukid then it could be natural to play q12, but with black strong on both sides it's not so severe and black could ignore again or even cut it. e18/f18 looks quite hot to me, as black I'd quite like to get in some kikashi there so j17 can build a little eyespace, so as white f18 is big, though with open at j17 not overly so. k15 is also a nice point, but is it a tad overconcentrated; so maybe k13?. Other points to consider are c8 (but does it work with white c14 rather than c13?), k2 is a large endgame for later, could reduce the moyo in m7 vicinity (but with k2 it's not so big), also q2 to think about. Or there's ideas like e9 or e11 or d11 erasing that left group from above and preparing stones to attack the top middle weak black group. Given Knotwilg's description I expected some obvious book move with few alternatives but I don't see it.
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Re: What does "natural" mean in go?

Post by Bill Spight »

Click Here To Show Diagram Code
[go]$$Wc White to play
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . . . 2 . . . O . . . . . |
$$ | . . O . . . . . X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . . . . . 1 . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
A "natural" human play is the boshi to attack the weak Black group. But Black has :b2: in reply.
Click Here To Show Diagram Code
[go]$$Wc White to play
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . . . . . . . O . . . . . |
$$ | . . O . . . . . X . . . . . . X . . . |
$$ | . . . O . . . . . 1 . . . O . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
So maybe :w1:, which is AlphaGo/Go Seigen style (the high shoulder hit)?
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Knotwilg
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Re: What does "natural" mean in go?

Post by Knotwilg »

I'll hide my answer for those who want to think about it some more, but for dfan, jlt, bill and uberdude:
What is natural for one is not for the other, hence this example. In my case, a weak group surrounded like this is screaming to be capped like Bill and dfan suggested. However, his move is not on Lizzie's list. Why not?
Click Here To Show Diagram Code
[go]$$W White to play
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . . . . . . . O . . . . . |
$$ | . . O . . . . . X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . . . . . 1 . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Well Bill had it right: there is an obvious answer for Black, making good shape, reducing WHite's strength (and potential territory):
Click Here To Show Diagram Code
[go]$$W Why the cap is not that interesting
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . b a . . . . . . . O B . . . . |
$$ | . . . . O X . . 3 O . . . O X . . . . |
$$ | . . . O . . . 4 X O . . . . . X . . . |
$$ | . . . . X . . . . 2 . c . O . . . . . |
$$ | . . O . . . . . X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . . . . . 1 . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
After this sequence, :w1: is oddly placed. Next White 'a' becomes urgent, or Black will easily settle with 'b'. Later, Black may play 'c' to further neutralize and weaken White's wall, which had been constructed at the expense of Black corner territory

So what does LZ like?

Bill suggested a shoulder hit and dfan suggested capping the bottom. Combining these ideas, indeed LZ has it on her mind to reduce the moyo like this, but she treats it as incidental, before playing the actual move she likes most.
Click Here To Show Diagram Code
[go]$$W Bots plat shoulder hits?
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . . . . . . . O . . . . . |
$$ | . . O . . . . . X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . 1 3 . . . . X O . |
$$ | . . O , X . . . . X 2 4 . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
jlt suggested the invasion and that too is on LZ's mind, with this follow-up:
Click Here To Show Diagram Code
[go]$$W Invasion?
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . . . . . . . O . . . . . |
$$ | . . O . . . . . X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X 6 4 . . . . . . . . . . . . . . |
$$ | . . . 5 . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . 1 3 . 7 . . . . . . . . . . X . . |
$$ | . 2 . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
I believe Lizzie dismisses it because this leads to more turmoil, while White is ahead and should play a simple move.

Two proverbs come to the rescue:
1) Make territory while attacking
2) the enemy's key point is your own

I had already learnt from the bots that attacking from above, forcing to live, and get central influence as a result, is not their preferred mode of operations. The resulting influence is not that valuable in the bots' eyes, while the forced life goes at the expense of territory and aji. Rather, the bots like to attack sideways and make territory. These observations, combined with Black's answer to the cap, lead us to:
Click Here To Show Diagram Code
[go]$$W Make territory while attacking
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . 2 1 3 . . . O . . . . . |
$$ | . . O . . . . a X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
This is LZ's preferred move. Playing :w3: immediately is the more passive version of the same idea. Uberdude called it "a nice point but a tad overconcentrated" - seems like his intuition is well developed, whether or not by studying with LZ.

It's very counterintuitive to me, because instead of attacking the weak group wholesale, I'm allowing that group to sacrifice a part and build influence by connecting at 'a'. However, if Black does that, White can set up a splitting attack.
Click Here To Show Diagram Code
[go]$$B Splitting attack
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . 4 3 . . . . . . . O B . . . . |
$$ | . . . . O X . . 5 O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . X O O . . . O . . . . . |
$$ | . . O . . . . 1 X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . 2 . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . 6 . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
:w2: splits and Black has to make life with :b3: and :b5:, strengthening White's corner and not affecting the top group, which had strengthened herself to start with. Next White' attack at :w6: is now much more purposeful.

Incidentally, Uberdude called out e18/f18 as hot and again LZ is on his side. She has it on her mind in the original position, and after having played the suggested moves, e18/f18 indeed becomes the best move very soon for either player. Well done ubderdude!

Finally, both Bill and Uberdude suggested the shoulder hit attack. How does Lizzie see the continuation?
Click Here To Show Diagram Code
[go]$$W Shoulder hit attack
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . 9 7 8 . . . . . . O B . . . . |
$$ | . . . . O X . . 6 O . b . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . . . . . . . O . . . . . |
$$ | . . O . . . . . X 2 4 . . . . X . . . |
$$ | . . . O . . . . 0 1 3 5 . O . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . a . . . . . . . . . |
$$ | . . . . . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Blocking leads to another variation, which LZ considers good for Black, so White backs off with :w2: After Black 10, White jumps at 'a' and Black next moves in with 'b'. No one will be hurt, but White's territory goes to waste here, which LZ doesn't like.
Bill Spight
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Re: What does "natural" mean in go?

Post by Bill Spight »

FWIW:
FWIW, the plays I considered, in order.
Click Here To Show Diagram Code
[go]$$Wc White to play, overplay
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . 5 . . . . . . . O B . . . . |
$$ | . . . 4 O X 3 . . O . . . O X . . . . |
$$ | . 0 7 O 2 1 . . X O . . . . . X . . . |
$$ | . 9 8 6 X . . . . . . . . O . . . . . |
$$ | . . O . . . . . X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Click Here To Show Diagram Code
[go]$$Wc White to play, overplay 2
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . 1 2 . . . . O . . . . . |
$$ | . . O . . . . . X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . . . . . , . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
After :b2: connects, the staff connection is strong, and White has no obvious follow-up.
Click Here To Show Diagram Code
[go]$$Wc White to play, another attack
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . 2 1 3 . . . O . . . . . |
$$ | . . O . . . . 4 X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . a . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
The wedge looks like the strongest attack, just considering the weak group. But it strengthens Black toward the center, which hinders reducing the Black moyo. OC, I had noted the weaknesses in the left side group, but I did not appreciate the power of White "a", did not even consider it. My bad. :oops:
Click Here To Show Diagram Code
[go]$$Wc White to play, large scale attack
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . . . 2 . . . O . . . . . |
$$ | . . O . . . . . X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . . . . . 1 . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
The boshi is not a very strong attack, but it aims at reducing the central Black moyo, as well, with possibly some support for an invasion or reduction of the left side. But :w2: is too good.
Click Here To Show Diagram Code
[go]$$Wc White to play, better shape
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . . . a . . . O . . . . . |
$$ | . . O . . . . . X 2 . . . . . X . . . |
$$ | . . . O . . . . . 1 . . . O . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . . . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
:w1: takes care of the reply at "a". OC, I saw :b2:, but thought that building up outside strength would support an invasion of the central moyo. As I indicated, I was not very confident that this was the bot play. But it was a high shoulder blow. ;)

Bot vs. human?

I correctly guessed that the boshi was the "natural" play, but it is not an example of topping the tree. White is not chasing Black out. It was not my first choice of attack. BTW, my first two choices were influenced by playing around with Deep Leela (Leela 11). I have been impressed a couple of times by its inside attacks of thin groups. Not that the idea was new to me, in general, but I had overlooked those possibilities. So now I am kind of primed to look for them. ;)

As for LZ's possible splitting attack, it was not on my radar, but I think that it would be on the radar of stronger amateurs than I, and probably on the radar of a number of weaker ones. It strikes me as quite human. :)
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.
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Knotwilg
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Re: What does "natural" mean in go?

Post by Knotwilg »

Continuing on Bill's "blind spot"
Click Here To Show Diagram Code
[go]$$Wc White to play, another attack
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . 3 . . . . . . . O B . . . . |
$$ | . . . . O X . . . O . . . O X . . . . |
$$ | . . . O . . . . X O . . . . . X . . . |
$$ | . . . . X . . X O O . . . O . . . . . |
$$ | . . O . . . . X X . . . . . . X . . . |
$$ | . . . O . . . . . . . . . O . . . . . |
$$ | . . . . 1 . . . . . . . . . . . . . . |
$$ | . . X . . . . . 4 . . . . . . . . . . |
$$ | . . . 2 . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . X . . . . . . . . . . . . X O . |
$$ | . . X . . . . . . . . . . . . . X O . |
$$ | . . O X . . . . . . 5 . . . . . X O . |
$$ | . . O , X . . . . X . . . . . X O . . |
$$ | . . . O O O . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
If Black defends against the invasion with :b2: then White can once more "make territory while attacking". Black will have to run out with something like :b4: at which point White can activate the reduction and build influence towards the running group again.

Incidentally, I wanted to check this with Leela but then my Laptop shut down. I hadn't fully plugged in my power supply so I think the shutdown was protecting the battery from all that deep search going on.
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