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Thank you for the review, lots of life and death tsumego homework for me to keep working on!

Interesting, thank you

Appreciate the details, never seen this pattern before.

i m glad i had the answer to this one ;)

H19, definitely a blind spot.

very useful, ty

Thanks for reviewing, for me(black) it was really hard in the endgame because I had 10s per move But I learned a lot from your review, so I hope to do my best next time as well

thanks!

Thank you! I won't be able to remember the variations precisely, but I was able to follow the outcomes very easily.

hello, very interresting problem, however, i can't see how it could be used in real game, since that kind of position never happen, specially with h19 for black, seem totally unreallistic to me. Thank you, for sharing, it was a real pleasure as always.

Also, we must consider the hane at A15 as well. After E15 F16 B18 C17 B17 C16 C15 B16 B15 A15, we have to exchange A14 A16 first. If we play D19 first, D19 C19 B19 E19 A14, black will no longer answer at A16, but rather fight the ko with A17. After A14 A16 exchange, white can no longer answer D19 with C19, but has to play B19, giving black the extra liberty he needs to win the semeai against the center group.

I struggled with this problem for an entire day. I was stuck on what to do after E15 F16 B18 C17 B17 C16 C15 B16 B15 A16. The best I saw was ko after D19 C19 B19 E19 A15 A17 F19 H18 D19 ko, black takes first. However, then I realized white doesn't have to play H18, but can instead start the ko like A18 D19 A19 B18 H18 B19, and it turns into a multi step ko for black. However, instead of D19 first, black actually has time to play B19. I originally discarded this move because both white groups have 4 liberties, and playing B19 doesn't fill a liberty, giving white first move to filling liberties, but I missed the key resource of B19 E19 C19, threatening to bridge under. Now white can't connect at B19 and loses the semeai by 1.

so nice

A17 should be the "more" correct move due to it being the superior endgame play in terms of points technically speaking

If the big loss of the Hane at F18 is that it is gote, is there merit to decending more simply at E18 instead, and if opponent responds, you maintain sente? this costs something like 2 points in endgame but maintaining sente in opening/middle game seems worth it.

I think after B E18, W can play D19. Then B E19, W F17 and W wins outright without giving up any stones.

After A16 B15, isn't the B19 tesuji working?

Thanks for the video! At time 1:51, can't white play at A19 instead of E18 to kill black instead of allowing black to live in seki?

excellent explanation 👍

i enjoy your videos, keep it up!

i see. so dead triangle is weak to double hane

I'm enjoying these short videos as a daily dose of practice

altho we maybe never use it on game, but its always amazing how smart tetsuji is

thanks for the instructives vid as always.

Very nice tutorials and impressive channel! Thank you!

Great video, thanks for sharing!

Thank you for the lesson

Really helpful, thanks.

great content, keep it coming!

haha, that was my game playing black. Thanks for the review! helped me a lot. I thought I cannot lose 44 because whites side would get too big. Thats why I tried to save every stone. But I should have see, what I wouldve gained and usually I know that Go is about give and take. I was just scared that I would "give" my opponent too much

Thanks for the amazing review!

much appreciated

thnaks!!!

Your explanation of this difficult problem is great, very thorough! Thank you.💌

nice explanation

thx

Tnx !

Very interesting video.

senseis.xmp.net/diagrams/49/aa3a496e9077e536d1ec7eb455b1e39a-thumb.jpg This is my favourite variation 🤣🤣

Yesss! This is the best way to play! Invade to any corner! 😅

Thank you for uploading these videos here on RUclips

at 6:10 when White has sente, would you find D10 an acceptable move?

Thanks for this. You are so underrated

Amazing! For the last problem, is it possible for black to play O-5 first? Not capture the white stone at O-6 and just surround?

Been blind to this since now.. this definitely opened up my perspective!

Yep always feels like such a trap

Thank you

at 7:04 is G2 a possible first move for black?

Upper right corner: the deeper reason, why Black can not win, although he has three more physical liberties than White is the fact, that he has one counting liberty less than White. In cases like this, when no side has an eye, all shared liberties count for the underdog (White) and only one for the favourite (Black). So White leads by one liberty five to four for a seki.

Hallo, nice lesson but there is a failure in the upper right corner. After the fourth move, Black has a big five-space-eye with three inside white stones, that is five liberties for Black. Because White has only a small eye, the shared liberties S17 and T17 count for Black anyway as always in a situation like this (o naka ko naka). So Black must not fill the shared liberties, these are wastet moves, because, after the fourth move, which are necessary, Black leads already with seven to four liberties.