On Sensei's Wiki, Thousand Year Ko is an alias for Ten Thousand Year Ko. Japanese, Korean and Chinese have a single word for "ten thousand", so it's natural to use "ten thousand years" metaphorically to mean "a very long time"; in English, there isn't, so "a thousand years" is more natural.
46:22 is NOT death bunny. Death bunny would need 18-1 to be finished rather than 19-1, because white captures with 17-3 after b19-1 and black can't reduce to one eye after that.
Under Japanese scoring because forcing the players to fully resolve the shape by playing it out forces one player to place otherwise unnecessary stones in their own territory to remove any potential ko threats. That can change the score drastically in Japanese scoring where it would not necessarily change in other scoring methods. When considered dead on the board, those moves are treated like any other move that would be needed to fully remove a dead group. The group is dead without them.
Hi Nick, I had a questions about the Carpenters Square. In the first example of this, after black plays 18-1, why does black need to play anything else? Hasn't black already reduced white to one eye?
In the corner shapes where Black has a farmer's hat in the corner (e.g. at 38:45), the semeai doesn't actually matter. However many liberties we give to White - it can't be seki because it's one one-eyed group vs one no-eyed group, and even if White captures it, it just leaves a dead shape. So white is caught in a double bind: can't succeed by capturing, and can't succeed by not capturing.
So, if you're playing american or japanese rules and you have an unremovable ko threat with a bent 4 in the corner and you dispute your opponent trying to remove the stones at the end of the game .... you still lose, even though you should be alive?
It IS really dead, that's the point. The one who can kill it could technically at the end of the game arduously remove every single ko threat on the board, and then finally start the ko and kill the group. Thing is, under territory scoring rules removing all the ko threats would cost you a bunch of points. That's why we need a special rule that simply states that the group is dead and you can take the stones at the end of the game; just like you do with all dead stones, you don't actually need to play all the capture moves. I mean, I guess it COULD be possible to rule that "unless black wants to invest all the moves to remove ko threats, the group lives in seki", but then the group's status would be different under different rulesets, which is kinda a bummer as well.
On Sensei's Wiki, Thousand Year Ko is an alias for Ten Thousand Year Ko. Japanese, Korean and Chinese have a single word for "ten thousand", so it's natural to use "ten thousand years" metaphorically to mean "a very long time"; in English, there isn't, so "a thousand years" is more natural.
The clearest explanation of bent four in the corner I have heard yet.
46:24 It is not a "death bunny" unless the ears are connected to the same point!
46:22 is NOT death bunny. Death bunny would need 18-1 to be finished rather than 19-1, because white captures with 17-3 after b19-1 and black can't reduce to one eye after that.
I'm really looking forward to the capturing race lecture ;)
Thanks! I wrote it myself, of course.
i can't believe you guys just wrote off the B-2 bomber shape! --sensei's library
"You died... In gote" Still laughing about it.
Under Japanese scoring because forcing the players to fully resolve the shape by playing it out forces one player to place otherwise unnecessary stones in their own territory to remove any potential ko threats. That can change the score drastically in Japanese scoring where it would not necessarily change in other scoring methods. When considered dead on the board, those moves are treated like any other move that would be needed to fully remove a dead group. The group is dead without them.
There is a little mistake I think. Min 46:26 it's not a dead bunny. One ear is at the wrong place, so W seems alive in that shape. ;-)
Ah, makes sense. Thanks!
Hi Nick, I had a questions about the Carpenters Square. In the first example of this, after black plays 18-1, why does black need to play anything else? Hasn't black already reduced white to one eye?
In the corner shapes where Black has a farmer's hat in the corner (e.g. at 38:45), the semeai doesn't actually matter. However many liberties we give to White - it can't be seki because it's one one-eyed group vs one no-eyed group, and even if White captures it, it just leaves a dead shape. So white is caught in a double bind: can't succeed by capturing, and can't succeed by not capturing.
I'm confused. Why is bent four dead by rule, if it's really not dead when there are unremovable ko threats? Why is the rule necessary?
seriously? Awesome I dig it.
1:02:06, after all that effort, Black is still in atari ;)
an outrage! B2 bomber is THE winningshape in go. period!
Btw. I love the opening theme music
I don't understand why its considered dead if it can be taken to Ko. Shouldnt it at least be Seki?
no
Killa Naru Because it going to Ko ends only in death
So, if you're playing american or japanese rules and you have an unremovable ko threat with a bent 4 in the corner and you dispute your opponent trying to remove the stones at the end of the game .... you still lose, even though you should be alive?
but if the bent 4 is not really dead why have the rules make it dead?
It IS really dead, that's the point. The one who can kill it could technically at the end of the game arduously remove every single ko threat on the board, and then finally start the ko and kill the group.
Thing is, under territory scoring rules removing all the ko threats would cost you a bunch of points. That's why we need a special rule that simply states that the group is dead and you can take the stones at the end of the game; just like you do with all dead stones, you don't actually need to play all the capture moves.
I mean, I guess it COULD be possible to rule that "unless black wants to invest all the moves to remove ko threats, the group lives in seki", but then the group's status would be different under different rulesets, which is kinda a bummer as well.
Your under-the-stones tesuji was still wrong.
It's 万年劫。万is 10,000
You look a lot like Magnus Carlsen, I've noticed haha.
first viewer woot