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  • Chen Yaoye took B. Zhu Ruiyang took W.

  • B kakari, W kosumi. It's very solid.

  • Then B kakari, W pincers, B attaches san-san.

  • If W hane,

  • it's a joseki.

  • W blocks, B atari, W atari, B atari, W connects.

  • This joseki is out-of-date.

  • It was W's komoku, now W is gote.

  • W's territory is also small. Locally it's bad for W.

  • If W hane, B nobi.

  • Then if W kosumi, B kosumi.

  • W keima, B keima, W jumps, B pushes, W blocks, B connects.

  • It's another joseki. But it's also bad for W.

  • On the top, W's speed is slow,

  • and on the left, W's shape is bad.

  • W can't nobi.

  • If W nobi, B cuts, W atari, B atari, W captures, B atari.

  • W can make a life, but it's very small.

  • So in this situation, W extends.

  • B hane, W connects, B kosumi.

  • If W keima, B will pincer.

  • If W extends, B keima. W is faster than this shape.

  • That's why W extended after the hane.

  • W is better than the old joseki,

  • but W would be still not satisfied.

  • So nowadays many players would extend directly.

  • B can't hane.

  • If B hane, W hane, B atari,

  • W nobi, B atari here, W can atari and nobi.

  • The corner is big.

  • Though B captured a stone here, B is not very thick.

  • This result is bad for B.

  • If B bumps,

  • W can't nobi. B kosumi.

  • If this stone was here, W is fine.

  • Now this stone is too near. W is not efficient.

  • So W should descent.

  • B can kosumi, W nobi, then B blocks, W keima.

  • Though W is not very thick, B is sealed in.

  • B can also consider to jump.

  • Next if W turns, B will pincer.

  • If W ogeima, B blocks the corner. Then W extends.

  • Now W's speed is fast. B is slow.

  • But it was W's corner. Now B gets the corner and B is sente.

  • So it's playable to both sides.

  • Personally I prefer W.

  • Some other players also didn't like B.

  • So a lot of new joseki were invented here.

  • For instance, B contacts.

  • W can't nobi here. This exchange would be very important.

  • Now B can simply bump.

  • W descents, B kosumi, W nobi, B blocks.

  • Relative to this joseki,

  • now this exchange is very good for B.

  • If now B contacts, of course, W should nobi here.

  • So this result is good for B.

  • B can also consider to hane.

  • W hane, B atari, W connects, B pushes, W atari,

  • B hane, W atari, B connects,

  • W turns, B hane.

  • Because of this exchange,

  • B can kill W. B is very thick.

  • The result is also good for B.

  • If W nobi here,

  • now B can't bump. W descents. It's good for W.

  • This exchange now is bad for B.

  • B should hane. It's a good move.

  • If W hane, B bumps, W crawls, B atari.

  • Of course, this result is good for B.

  • If W hane, B can't nobi.

  • If B nobi, with this exchange, W hane, and W can connect.

  • B should press.

  • W hane, B bumps, W crawls, B atari, W connects, B nobi.

  • W's position is very low. And W's shape is bad.

  • W will be very hard to get out.

  • If W hane,

  • B can clamp.

  • If this exchange was not made,

  • W can simply bump. B blocks, W pushes.

  • B's shape is very bad.

  • Now B clamps, W bumps,

  • B blocks, W pushes,

  • B atari. Now you see this exchange is very, very bad for W.

  • If W presses, B atari, W descents, B blocks.

  • B can kill W.

  • If W turns, B can double hane.

  • W atari, B connects, W atari, B descents,

  • W atari, B atari here, W captures, B throws in,

  • W captures, B connects.

  • If W connects, W is not enough for the capturing race.

  • If W jumps, B can cut W then kill the three.

  • It would be very bad for W.

  • When B contacts, hane is the right choice.

  • B contacts, there was a condition,

  • B must be favorable in ladder breaker.

  • B hane, W atari, B nobi, W atari,

  • B counter atari, W captures, B atari, W connects,

  • W atari. Here is the ladder.

  • Then W hane to kill the corner.

  • B captures.

  • W gets the corner. B's shape is also good.

  • It's a new joseki.

  • I'm not sure. Maybe it's an equal result.

  • In the future, B blocks, W descents,

  • B kosumi, W can't tenuki.

  • Blocking here would be B's sente.

  • So this move is very big.

  • It's the newest joseki.

  • In actual game, B keima. It's also a choice.

  • W can't nobi. This exchange would be fatal.

  • B hane, W hane, B atari, W nobi, B connects, W nobi.

  • If it was like this, B will collapse.

  • Now with this exchange,

  • B can push here. It's too bad for W.

  • Now kosumi is a choice.

  • B kosumi, W nobi, B descents, W nobi.

  • It's another new joseki. Maybe it's an equal result.

  • In actual game, W hane.

  • B can't nobi. If B nobi, W kosumi.

  • This is a joseki, B kosumi, W has two weak points.

  • But now, this exchange helped W reinforce.

  • B's shape is pretty strange.

  • So B should block.

  • Then W bumps,

  • Now B can't kosumi.

  • If B kosumi, W nobi, B can't connect here.

  • If B connects, W hane,

  • B must cut. The shape is very bad.

  • Then W atari, B connects.

  • W kosumi, B blocks, W hane. B will be killed.

  • So B must connect.

  • Then W atari, B descents. The hane is still W's sente.

  • The corner is living. B's speed is very slow.

  • B is very bad.

  • Now descenting is also not good.

  • W hane, B attaches, W nobi, B hane, W kosumi.

  • The two B stones are very heavy.

  • The result is bad for B.

  • In actual game, B attaches.

  • W hane, B wedges, W atari, B connects, W connects,

  • B jumps, W nobi, B hane, W hane, B double hane, W nobi, B connects,

  • Next W can keima here or descent here.

  • W gets the corner and this shape is not weak.

  • Personally I prefer W.

  • In actual game, W descents. It's territorial.

  • The shape here is not good, but next W can turn...here.

  • The territory would be very big.

  • B extends, W turns, B jumps, W turns.

  • Here is a cutting point. In the future if W has to connect,

  • B would be good.

  • If W doesn't have to connect,

  • W's efficiency would be high.

  • B shimari, W kakari.

  • W kakari on the fourth line,

  • in order to cover the cutting point here.

  • If B attaches.

  • This result is good for W.

  • W will be easy to connect.

  • W got territory on the top-left,

  • B must attack and threat W's cutting point.

  • So B pincers.

  • If W jumps, B jumps, W jumps, B jumps,

  • W pincers, B jumps. Many of W groups need to settle.

  • B's thickness would be useful.

  • This result is good for B.

  • So W ogeima to avoid fight.

  • B attaches, W hane, B nobi.

  • W is not favorable in ladder breaker, so W can't bump.

  • B jumps, W hane, B connects, W presses, B nobi.

  • W is not favorable in ladder breaker,

  • so W can only kosumi.

  • I think I introduced this joseki in "10 minute go" episode 10.

  • So I will not talk more about this.

  • Anyway, locally, if W can descent,

  • it's an equal result.

  • If W could kosumi, we considered it's bad for W.

  • So in actual game, W attaches san-san.

  • B jumps, W hane. If B hane, W atari,