Unranked
Rules: Japanese
Review by: ...
Aobozu[2k]: nice!
aresdonuts[6k]: hey guys
clackie[6k]: hi!
aresdonuts[6k]: is there a discord or anything open for this?
PfvaldtherGroenholm[4k]: Hi and thanks in advance for the lecture
mark5000[7d]: No, this is a text lecture only.
aresdonuts[6k]: cool
CalabiYau[6k]: hi
AnthofromWorld[3k]: Hi thanks for the lesson
CalabiYau[6k]: yeah thanks Mark !
aresdonuts[6k]: When did you start playing go mark?
Aobozu[2k]: Thanks Mark!
mark5000[7d]: I started playing Go 10 years ago in college. I joined a Go club there and got hooked. Then I studied a lot as a hobby and gradually increased rank over the years. I've been a dan player for a few years now.
Move 0 + 8
Yaka_Go[6d]: what if black doesnt defend
Move 0 + 6
mark5000[7d]: Good question
mark5000[7d]: Of course, a 4 dan knows this and so is just testing the beginners. ;) Does anybody know?
mark5000[7d]: White to punish Black's play elsewhere.
fishku[2d]: r15?
clackie[6k]: you could play s18 in sente
字成長[4d]: i think W play at S15
Fysh[6k]: s18?
Move 0 + 7
PfvaldtherGroenholm[4k]: S15?
Move 0 + 6
Wong Kar-Wai[6k]: Clamp?
Burak23[4k]: S15 ?
GarthSchmader[6k]: r15
mark5000[7d]: I'm glad we talked about this, since we have a few answers.
mark5000[7d]: All of those moves punish Black, but some are better than others.
Move 0 + 8
geotheory[6k]: R12
Move 0 + 10
jillgoodgal[9k]: plus white starts to get thickness pointed down the right side
Move 0
TheApprentice[8k]: mark5000, thanks for this " joseki lecture"
Move 0 + 10
mark5000[7d]: welcome
Move 0 + 6
geotheory[6k]: How did white get 2 moves?
Move 0 + 11
clackie[6k]: black tneuki
Move 0 + 8
jillgoodgal[9k]: white gets two local moves if black plays elsewhere
Move 0 + 6
mark5000[7d]: Clamp at R15 is fine, but Black would live small on the side.
Аlрhа - 1 5 2[?]: Hi, Mark!
mark5000[7d]: Bending at S18 is a bit more slack, letting Black fix the cutting point right afterwards.
geotheory[6k]: Pretty big 'if' when we're talking tactical battle?
Wong Kar-Wai[6k]: But R15 removes aji of him coming around your group into the middle?
fishku[2d]: Can we say that r15 might be viable if sente is big, as s15 seems to be gote?
Move 0 + 8
user5555[4k]: @geo: it's not a big if at all... it's just a variation to show why black has to defend here.
Move 0 + 9
user5555[4k]: ... and to see how white would punish if B didn't.
Move 0 + 14
mark5000[7d]: fishku, sure. It's a bit beyond the level of this lecture though.
Move 0 + 5
Wong Kar-Wai[6k]: Is this a preference thign?
Move 0 + 7
Wong Kar-Wai[6k]: I prefer the influence and wall of R15 vs living small of S15.
Move 0 + 14
geotheory[6k]: @<error> of course that could happen, but then we're not talking about fighting black's top game are we..
Move 0 + 7
mark5000[7d]: Yes, both moves are possible
mark5000[7d]: Let's get back to the main variation.
mark5000[7d]: Black should not play elsewhere at this point without a very good reason.
Move 0 + 8
user5555[4k]: @geo: the board is big, you never know what else there is that B might want to do... and sometimes your opp just makes a mistake, then it is always good to know WHY this was a mistake...
Аlрhа - 1 5 2[?]: Mark, What if black plays q15 instead of s15? Can it be good for anything?
user5555[4k]: ... it's not like we just hope that B will play stupid here ;-)
Move 0 + 7
mark5000[7d]: Good question, too.
user5555[4k]: i was wondering about Q15 also
mark5000[7d]: This looks better than playing elsewhere. It does defend the cutting point somewhat
mark5000[7d]: Of course it doesn't actually defend the cutting point does it?
mark5000[7d]: White can reactivate it while gaining points in the corner.
Wong Kar-Wai[6k]: S15 again?
Аlрhа - 1 5 2[?]: S16
Move 0 + 9
Аlрhа - 1 5 2[?]: Variation: 1
Move 0 + 14
geotheory[6k]: @<error> I get that. I just don't see value in hypothesising about such moves in context of a tight tactical contest
Move 0 + 6
clackie[6k]: to understand why some moves are better than others
mark5000[7d]: So if your opponent plays Q15, just take the corner.
Move 0 + 8
user5555[4k]: @geo: in my games, things like that happen all the time... and often I know this can't be good, but I don't really know why. So this is just as important as the main line, to me at least.
Move 0 + 9
user5555[4k]: shows you what a good shape looks like, and what a bad shape might look like..
Burak23[4k]: what if white plays q13 instead of p14
mark5000[7d]: Q13 would be a good move too
mark5000[7d]: I don't have a refutation for that.
user5555[4k]: @geo: also, it might be the other way around: YOU might be in a game where there is some great play elsewhere on the board...
mark5000[7d]: You could call it joseki-ish
Move 0 + 10
Аlрhа - 1 5 2[?]: Variation: How should B respond to this?
Move 0 + 8
user5555[4k]: ... and then it is good to estimate how much better that has to be to compensate for the weakness you have to leave here...
Move 0 + 9
jillgoodgal[9k]: so now white continues to move out, or slides along the top?
mark5000[7d]: Yes.
Move 0 + 11
user5555[4k]: that looks pretty good for B now, doesn't it?
Move 0 + 12
Burak23[4k]: maybe depending on the board attacking m16 next ? since white build a wall like thing
fishku[2d]: it's fine to look good for B, since B started with 2 stones and W with 1.
mark5000[7d]: Yes, that's the purpose of this joseki.
clackie[6k]: now it looks pretty good for w
Wong Kar-Wai[6k]: I'd say it's quite balanced.
Wong Kar-Wai[6k]: Such a joseki gives white a good launching pad for reductions and middle influence.
p6109[3k]: better to pincer than make a base? at say N17
user5555[4k]: n17 is a big overconcentraded, no? white is not in trouble.
p6109[3k]: ok
Move 0 + 3
mark5000[7d]: So this joseki isn't that hard.
mark5000[7d]: But actually it wasn't considered joseki until AlphaGo played it.
mark5000[7d]: I want to show you why, if that's ok.
user5555[4k]: please go on!
mark5000[7d]: It's more of historical interest, but you can learn other moves in the process.
p6109[3k]: of course
Burak23[4k]: yes please
Move 0 + 6
fishku[2d]: Can white also play m14? I thought I remember something like this. Maybe just for blitz :p
mark5000[7d]: Yes, that would be acceptable departure from joseki
mark5000[7d]: Don't let joseki study take away from your creativity!
fishku[2d]: :)
Move 0 + 9
geotheory[6k]: @<error> I tenuki frequently in first half of the game. Makes it harder for oppo to guess your strategy imo
Move 0 + 6
mark5000[7d]: Still, it's helpful to know what the fair patterns are, so you can know when you're breaking them
Move 0 + 9
geotheory[6k]: Not that I'm any kind of authority in this game..
Move 0 + 10
user5555[4k]: @geo: exactly... me too. even more reason to know why the joseki wants another move here...
mark5000[7d]: What do you think of this joseki?
mark5000[7d]: Compared to the other joseki
Burak23[4k]: i would prefer the other one
user5555[4k]: I think it looks very complicated and I don't like that ;-)
snakesss[4k]: white got one extra stone for safety when attacking blacks lonely stone
mark5000[7d]: It is more complicated, if a little bit.
snakesss[4k]: but black got 0 aji on the right
user5555[4k]: I don't like white, but also not black...
mark5000[7d]: Here's what the professionals thought.
mark5000[7d]: Black is low on the right. Black occupies the third line.
Move 0 + 12
mark5000[7d]: In this joseki, Black occupies the fourth line.
user5555[4k]: 'xactly.
mark5000[7d]: So why in the world would we EVER choose this joseki. We could make Black on the third line and settle for less.
clackie[6k]: because the pincer stone is super weak and if black doesn't live it somehow white gets huge territory
mark5000[7d]: That reasoning made this joseki rare among pros for a very long time.
snakesss[4k]: but doesnt white have more eyespace and thickness now?
mark5000[7d]: Yes and yes.
mark5000[7d]: This pattern wasn't really "bad." It was considered slightly inferior.
mark5000[7d]: Because professionals don't like giving opponents free points without significant cost.
mark5000[7d]: Fast forward to the year 2016.
mark5000[7d]: It is AlphaGo versus Lee Sedol 9p, game of the century already, and AlphaGo plays this as the first joseki is plays.
mark5000[7d]: AlphaGo is White.
mark5000[7d]: And AlphaGo attaches at R17.
mark5000[7d]: I was watching the match live on my TV, streaming the broadcast from the internet, and Michael Redmond was commentating.
mark5000[7d]: He and the Korean commentator mentioned how this joseki was surprising, and they played out the other one below.
mark5000[7d]: They said how happy Black was to get the fourth line placement.
mark5000[7d]: And then AlphaGo won.
mark5000[7d]: Of course there's a lot of stuff in between, but I want to focus in on why AlphaGo might have chosen this joseki.
snakesss[4k]: it knew it would win and wanted the extra benefit of puny humans thinking this joseki is good?
mark5000[7d]: Hahaha
Move 0 + 4
mark5000[7d]: We have other AlphaGo-style AI to help answer our question why AlphaGo might play this way
mark5000[7d]: I studied this pattern and found something surprising.
Move 0 + 5
mark5000[7d]: Attach here.
mark5000[7d]: One thing AlphaGo taught professionals is that the corners are more valuable than previously thought.
mark5000[7d]: This is part of the reason for early 3-3 invasion of a 4-4 point, for example.
mark5000[7d]: So AlphaGo might play here.
Move 0 + 9
mark5000[7d]: This joseki is normal. I taught it before.
user5555[4k]: if the corners really are so valuable, why doesnt alphago play 3-4...?
mark5000[7d]: I don't know.
user5555[4k]: just a retoricval q really.
mark5000[7d]: Fine Art just won the AI competition in China. Fine Art plays dual 3-4.
mark5000[7d]: That question is beyond my level.
user5555[4k]: interesting. never heard of that bot.
Move 0 + 13
mark5000[7d]: You all know this joseki, correct?
Move 0 + 14
user5555[4k]: yeas!
Burak23[4k]: yes
user5555[4k]: the only one we know!
mark5000[7d]: This is the most basic joseki for the 3-4 point.
mark5000[7d]: It was the first 3-4 joseki I learned.
mark5000[7d]: And it's still joseki today.
mark5000[7d]: Here's the professional thinking:
Move 0 + 13
mark5000[7d]: Say White tenukies here.
Move 0 + 11
mark5000[7d]: And now Black pincers.
Move 0 + 9
mark5000[7d]: And now White jumps out with a one-space jump
mark5000[7d]: We'd get the same pattern we started with
mark5000[7d]: Who is this good for?
user5555[4k]: b
mark5000[7d]: It seems B, right?
clackie[6k]: yes
mark5000[7d]: To me, B is obviously better.
mark5000[7d]: White should not play away, Black pincering is good, and White jumped too small.
mark5000[7d]: Cue my surprise when I found a joseki resource that said this was good for White.
user5555[4k]: no way
clackie[6k]: attack
user5555[4k]: says the 10kyu!
snakesss[4k]: rofl
mark5000[7d]: The stated reason was: Black is too close to White's thickness.
snakesss[4k]: how could this be good for white?
clackie[6k]: k16 it to death!
mark5000[7d]: Oh boo. It's wrong. I'm sorry.
user5555[4k]: see, told you so! :)
Move 0 + 8
snakesss[4k]: Variation: shouldnt we play this then?
Move 0 + 9
mark5000[7d]: Professionals were all misguided on this point.
snakesss[4k]: oh then b wouldnt pincer
snakesss[4k]: would keep taking the right
Move 0 + 5
user5555[4k]: what's wrong mark??
mark5000[7d]: In all of history from the invention of Go until 2016, professionals attached at P17 only 4 times.
Nev77[3k]: Hi guys
Nev77[3k]: Is there audio?
snakesss[4k]: no
user5555[4k]: that it's good for B or that it's good for W?
mark5000[7d]: Text only
Nev77[3k]: Ok
mark5000[7d]: <error>: Pros didn't attach here because they thought it good for White.
mark5000[7d]: We now know that's not the case
user5555[4k]: wow.
user5555[4k]: see.... should've listened to the 10kyu from the start!
mark5000[7d]: They overlooked this move for centuries.
mark5000[7d]: And undervalued the corners.
mark5000[7d]: I don't mean to disparage professionals. They played according to their best understanding and were correct about a great number of things.
mark5000[7d]: Their level exceeds my own.
mark5000[7d]: They were just not correct about this one point.
Move 0 + 4
user5555[4k]: i think we all understand that... it's easy now to be clever with alphago at hand...
mark5000[7d]: Let's go back to this joseki
snakesss[4k]: they played without komi for years
snakesss[4k]: i am not surprised they missed this
mark5000[7d]: AlphaGo attaches here because otherwise Black gains the corner territory
mark5000[7d]: That's what it comes down to
mark5000[7d]: I recommend this move in your games
mark5000[7d]: If your opponent playing White plays P14, attach at P17.
Move 0 + 7
mark5000[7d]: And enjoy your corner and pincer.
Move 0 + 12
mark5000[7d]: I think you'll agree that this joseki isn't very hard. Try it out!
mark5000[7d]: That's all I have prepared for today's lecture.
p6109[3k]: thanks
user5555[4k]: thx a lot
user5555[4k]: gg
user5555[4k]: ;)
clackie[6k]: the attach at r17 still seems scary to me
tmrbad[1d]: thank you mark5000
mark5000[7d]: This lecture is part of my lecture series on becoming 9 kyu. Find past lectures here: becoming 9-kyu-a-series-for-beginners
Fysh[6k]: very instructive - thanks !
snakesss[4k]: that white dragon will die at the hands of ddks
mark5000[7d]: Any questions?
user5555[4k]: what if b cuts after r17?
user5555[4k]: at q17
Move 0 + 5
Burak23[4k]: Thanks for the lesson Mark
user5555[4k]: yep
Move 0 + 6
mark5000[7d]: How does Black continue?
user5555[4k]: they< do this allthe time to me
snakesss[4k]: q18?
snakesss[4k]: extend weakest stone?
mark5000[7d]: It's an overplay. Otherwise it would be joseki.
Move 0 + 8
mark5000[7d]: White has to stay tough.
snakesss[4k]: is it o17 now? cuz b still not safe
snakesss[4k]: or just take lliberties?
mark5000[7d]: There's a well-known tesuji here
snakesss[4k]: in the corner? i dont think that works
snakesss[4k]: s18=
snakesss[4k]: what is it?
mark5000[7d]: The dan players will see it.
Move 0 + 9
user5555[4k]: some graveyard thing?
mark5000[7d]: Tesuji.
mark5000[7d]: Belly attachment
snakesss[4k]: is DAN
user5555[4k]: but it thought its BAD for black?
mark5000[7d]: Read about it ^^
user5555[4k]: how is that bad?
Move 0 + 12
mark5000[7d]: Because unfortunately the tesuji doesn't work.
mark5000[7d]: :(
Move 0 + 9
snakesss[4k]: btw mark, is there a bug with sync?
Move 0 + 12
user5555[4k]: hehe
mark5000[7d]: White simply ataries and connects.
Move 0 + 8
snakesss[4k]: i go out of sync
Move 0 + 9
user5555[4k]: so its more of a badsuji
Move 0 + 11
mark5000[7d]: Black needs an extra stone, typically
mark5000[7d]: Then this tesuji is soo good
Move 0 + 13
mark5000[7d]: Anyway, Black plays here
mark5000[7d]: The exchange is still useful
mark5000[7d]: Now WHite's turn for tesuji
mark5000[7d]: Anyone see the tesuji here?
tmrbad[1d]: r14 ?
Move 0 + 14
mark5000[7d]: Nose hit
Move 0 + 18
mark5000[7d]: After all this, White is better
user5555[4k]: that is good for w?
snakesss[4k]: black was gonna net those 2 but if white just escapes then w got a weak group
Move 0 + 19
snakesss[4k]: so instead of netting, w uses those 2 stones as a sacrifice to get the right?
mark5000[7d]: In gote
snakesss[4k]: inread of escaping the net*
mark5000[7d]: Look how over-concentrated Black is!
snakesss[4k]: instead*
mark5000[7d]: So many stones in such a small area.
mark5000[7d]: Black is horrible
mark5000[7d]: horrorible
user5555[4k]: yes but W as just as many stones here...
snakesss[4k]: white isnt that great either imo
tmrbad[1d]: thank you
mark5000[7d]: And the two white stones have aji
user5555[4k]: and only a few pts
snakesss[4k]: b got thickness and the upper side
mark5000[7d]: Hmm
snakesss[4k]: i like black tbh :S
Move 0 + 9
user5555[4k]: I'm sure you're right, but I don't see it...
mark5000[7d]: Honestly your opponents will never play here will they
snakesss[4k]: hahahaa
Move 0 + 9
mark5000[7d]: They're cowards and so will play here
Move 0 + 10
user5555[4k]: hehe
Move 0 + 12
snakesss[4k]: hey, that was my first choice :P
mark5000[7d]: Then you kill them to death
mark5000[7d]: There. White is better
snakesss[4k]: ez pz
mark5000[7d]: The badsuji is still a goodsuji
snakesss[4k]: iif you can follow it up with more goodsujis
Move 0 + 7
mark5000[7d]: Black can also resist here
Move 0 + 8
snakesss[4k]: does anyone go out of sync without clicking anything?
Move 0 + 9
user5555[4k]: yep
Move 0 + 15
mark5000[7d]: Probably Black should confine White to the corner.
Move 0 + 8
user5555[4k]: still looks pretty good for B?
Move 0 + 15
user5555[4k]: so q17 doesnt look that bad after all...?!
snakesss[4k]: i like white
user5555[4k]: i'm not sure
snakesss[4k]: b got one weak group and weakish group
user5555[4k]: b has 4th line terr on top
Move 0 + 16
user5555[4k]: white only small corner
Move 0 + 18
mark5000[7d]: Do you still like Black?
user5555[4k]: both have a weak fgroup
user5555[4k]: well b q15...
Burak23[4k]: looks bad somehow
snakesss[4k]: if they continue this, it seems to me like b could get 2 sides
user5555[4k]: then r14 or something
Move 0 + 19
pipelord11[4k]: black is too ackward to play r14lol
Move 0 + 18
snakesss[4k]: but white will be thick and safe in the middle
snakesss[4k]: so from now on, everywhere else, white can go for territory, feeling safe to have destroyed chances of a moyo
user5555[4k]: I'd say white has a floating group in the middle that doesn't do much...
user5555[4k]: except run
Move 0 + 23
user5555[4k]: r13
user5555[4k]: no
snakesss[4k]: a weak group cutting 2 weak groups is not a weak group
user5555[4k]: that's awful
Move 0 + 21
pipelord11[4k]: This group will generate large sums of influence...
Move 0 + 21
mark5000[7d]: Here?
user5555[4k]: or bewtter q14
user5555[4k]: maybe
user5555[4k]: i think q14
Move 0 + 21
user5555[4k]: yes
mark5000[7d]: I agree with Q14 here
user5555[4k]: looks better
mark5000[7d]: Anyone seen my destroying shape lecture?
user5555[4k]: now white has a runner in the middle
snakesss[4k]: s14
snakesss[4k]: right away?
mark5000[7d]: Where does White play immediately?
snakesss[4k]: white got 4 liberties in the middle
user5555[4k]: well s14 now
mark5000[7d]: snakesss watched it
user5555[4k]: but still
Move 0 + 22
pipelord11[4k]: s14
mark5000[7d]: Everyone is a shape expert
snakesss[4k]: lol
mark5000[7d]: It's easy to harass Black
Move 0 + 19
pipelord11[4k]: instead of hane Q15 can it be start from Q14 ?
Move 0 + 18
mark5000[7d]: Yes, better
Move 0 + 19
mark5000[7d]: My personal opinion is here.
mark5000[7d]: Q14 is similar
snakesss[4k]: when you play this, do you think "i dont mind sacrificing r16 stones"?
snakesss[4k]: or will they live for sure?
Burak23[4k]: they are alive
snakesss[4k]: they can be
user5555[4k]: they are cutting stones so they are important...
snakesss[4k]: but i am asking if it is in some way more profitable to sac them
user5555[4k]: not just crapstones
snakesss[4k]: oooh
snakesss[4k]: right right
snakesss[4k]: good point
user5555[4k]: thanks :)
mark5000[7d]: snakesss: maybe rewatch my pivotal vs. useless stones lecture?
user5555[4k]: well... I can only say I still like blank here
mark5000[7d]: It's fine.
mark5000[7d]: Please try it out in your games.
user5555[4k]: but white q14 looks good
mark5000[7d]: Yeah
Move 0 + 14
user5555[4k]: yes of course
Move 0 + 5
mark5000[7d]: Maybe this is your secret dagger, a trick your oppoennts will always botch
user5555[4k]: thanks for the extensive answer though
user5555[4k]: it's not that easy
user5555[4k]: even if the cut is not correct...
mark5000[7d]: As I said, departing from joseki can be good. Stay creative. Know joseki so you know when you're breaking it.
mark5000[7d]: Know the rules to break them.
mark5000[7d]: In this case the rule is S17 hane.
mark5000[7d]: Any other questions?
Move 0 + 3
user5555[4k]: thanks
Burak23[4k]: Thanks
ErikBolding[8k]: Thanks
mark5000[7d]: Cheers everyone. See you next week around about the same time.
ppn0405[5k]: Thanks
tmrbad[1d]: thank you
snakesss[4k]: ty o/
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