The Magic of Go #2 — Eternal life

The Magic of Go #2 — Eternal life

February 3, 2020 0 By Sebastian Fry


Hey guys Vadim from Go Magic here and this is another video from the magic of Go series in this video we’re going to
talk a little bit about the draw in Go when you learn the rules of the game they tell you that in modern Go a draw is impossible because of komi but it’s not necessarily so later you learn that if you have
several kos on the board let’s say three you can start playing them in succession and this triple ko will not let you finish the game so basically it’ll become a draw but it’s not the only way and today we’re going to see one more very peculiar situation that’s a lot more obscure
but that can also lead to a draw so here we go games that end without result are incredibly rare just think about this from the moment the Japanese Go Association
was founded in 1924 all the way to the present day there were only about 20 of these games played by professional players and now we’re going to see one of these games here’s what happened in 2013 in a game
between two Korean professionals there was obviously a huge fight in the upper left corner black has a very strong wall in the center white has a living group but all of our attention is directed towards the black group in the corner what’s going to happen to it? It’s white’s turn and white throws in
taking away black’s eye if black doesn’t do anything right now with the next move white will build a bulky 5 shape and black will die to prevent this black has
to play there himself even though it’s a sacrifice white captures but black can capture back and now we’re back to the starting position white throws in again this can continue indefinitely and the biggest problem is that neither player can really play elsewhere in this situation If black lets this group die then white will control all of this corner white will have territory here on the top and in this corner and white will win easily If the black group lives white won’t have too much cash white only has two points here a small corner and there’s also a
possible invasion on the top and this very powerful wall that black has in the center will definitely help him in the fight this position would look
favorable for black so both players have to keep playing in the upper left corner and the game was judged to have no result This situation is known as eternal life
or in Japanese — Chosei if this happens in one of your games an old Chinese book suggests should immediately buy some meat fish and wine to celebrate the occasion because it only happens but once in a lifetime it’s time for some problems and first I’m going to show you the solution to the problem from the previous video black to play as you can see there is a ko here but because it’s always available to black it’s not really the solution if black tries some standard way of connecting for example this reverse monkey jump it doesn’t really work white can push and then throw in and when black captures atari now black can’t connect and the black group is dead the only way for black is to play this move first it’s a weird shape but it’s the only
thing that works now it’s very hard for white to answer if white tries to block directly black can easily connect over on the first line so the best response for white is this diagonal move now black can’t connect easily but now black can play this double atari white has to connect and black makes an eye and now we have a classic case of eye versus no eye a group with an eye is usually stronger white connects and black takes away a liberty and even though black and white
have the same amount of liberties white loses white can’t approach because black has an eye so this is the right answer and this is also the kind of solution
that we expect from you guys you have to discover
the correct first move then find the opponent’s strongest response and then show the complete sequence all the way to the end now here’s one more problem which is closely connected to the topic of this video black to play he has to create eternal life and to make it a little more interesting for you the first person to give us a complete
and correct answer will get a premium account and I’ll see you in the next video