(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
MULTIGOGM[1]
;B[qd]
;W[od]
;B[mc]
;W[qc]
;B[qg]C[Nowadays, this joseki is very popular.]
(;W[rd]C[This is over play.]
;B[pc]
;W[pd]
;B[qe]
;W[pb]
;B[rc]
;W[oc]
;B[rb]C[black is good.])
(;W[pd]C[Normal.]
;B[rd]C[Only move for black.]
(;W[ob]
(;B[jc]
;W[rc]
;B[qj]C[Joseki. Even.])
(;B[rc]
;W[kc]
;B[md]
;W[of]C[Fighting. Usually, white is not bad.]))
(;W[nc]
;B[ld]
;W[rc]
;B[qj]C[Joseki. Black is a bit better.]
(;AE[nc][ld]AW[ob]AB[jc]LB[jc:A][nf:B]C[This is the old joseki
Black is fast on the side with A but the center around B is still open.
Black can not easily seal in white.])
(;B[nb]C[A big follow-up.]
;W[ob]
;B[nd]
;W[oc]
;B[nf]C[Later black can block the center off with this stylish jump.
Comparing with the other joseki black is a bit slow on the upper side, but black has more potential in the center.]))
(;W[pf]
;B[pg]
;W[og]
;B[oh]
;W[nh]
;B[oi]
;W[ng]
;B[qf]
;W[jd]
;B[ne]C[Joseki. After this, fighting is very complicated.]))
(;W[qe]C[What do you think about this move? Is it playable?]
;B[rd]
;W[re]
;B[pd]
;W[pe]
(;B[pc]C[Black has to play here.]
;W[oc]
;B[ob]
;W[of]
;B[qb]C[A bit better for black.])
(;B[oc]C[Overplay.]
;W[pc]C[White can cut.]))
(;W[pf]C[This is the topic of episode 122. See:https://badukmovies.com/episodes/the-knight-and-the-princess])
(;W[mb]C[This lesson's main topic is this tricky move.

If black plays the right answer, black will have a slightly better position. 
However, finding the right move is not easy!]
(;B[nc]
;W[oc]
;B[nb]
;W[qe]
;B[qj]
;W[of]C[White wants this variation. White is good.]
;B[rd]C[When black extends, white will bump.]
;W[qf]C[Black's exchange is worse than white's. Black also can't escape in the corner here. White is a bit better.])
(;B[lb]
;W[nb]
;B[lc]
(;W[rc]
;B[qj]C[White is good.
White's territory is a bit better. compared to the normal joseki.])
(;W[rd]
;B[qe]
;W[rc]
;B[qj]LB[ne:A]C[White can play like this. Also ok. But later black will have a nice move around A.]))
(;B[lc]C[What about this move?]
(;W[nc]
(;B[lb]
;W[rc]
;B[qj]C[White is a bit better.])
(;B[rc]
;W[lb]
(;B[pc]
;W[kc]C[White is too strong. White is good.])
(;B[kc]
;W[pc]C[white is a bit better.])))
(;W[nb]C[Playing here now is unfavourable for white.]
;B[rc]
;W[lb]
;B[jc]C[Pushing like this is very low for white. White does not gain enough here. Good for black.]))
(;B[nb]C[How about this move?
]
;W[nc]
(;B[lb]
;W[md]
(;B[lc]
;W[ob]
;B[ma]
;W[rd]C[Slightly better for white.]
;AW[dp][pp][fq]AB[dc][ci][cn]LB[dc:A][ci:B][cn:C]TR[lb][lc][mc]C[But if black has A-B-C formation, it is playable for black.
The marked stones work together with the mini-chinese framework.])
(;B[ma]
;W[lc]
;B[kc]
;W[mb]C[Normally this ko is bad for black. It is tough to play this type of ko in the opening. 

However, young Chinese star Mi Yuting plays it with success in a game, see here: https://badukmovies.com/pro_games/47844-mi-yuting-kim-junghyun?move=16

]))
(;B[ob]C[Playing here doesn't work well for black.]
;W[pd]
(;B[lc]
;W[qe]C[White is better.
])
(;B[rd]
;W[lb]
;B[pc]
;W[md]
;B[qb]
;W[lc]C[White is too strong on the outside. we can compare to normal joseki.
]
;B[cp]
;W[ep]
;B[eq]
;W[fq]
;B[dq]
;W[fp]
;B[cn]
;W[jq]TR[lb][mb][lc][nc][md][ep][fp][fq]C[In both these positions, black's corner territory is about equal. However, if we compare the result for white, white is much better at the top. White has no aji there, whereas at the lower side black can still invade.
At the top white is thicker.

])))
(;B[rc]C[Black can think of this move.]
(;W[pd]
;B[qe]
;W[rb]
;B[qb]
;W[pc]
;B[sb]
(;W[lc]C[But white is too strong. White is good.]
;B[nb]C[Black will have this aji in white's position. However, playing it immediately is a bit too early.]
;W[nc]
;B[md]
;W[lb]
;B[nd]
;W[oc]
;B[of]C[Black can block the center off, However, the timing is difficult. Now it's a bit too early.])
(;W[pf]C[If white doesn't want black to have the aji to block the centre off, white can play here.]
;B[qf]
;W[lc]LB[lc:B][mc:A]C[Like this white has made the right side of black stronger, but also reinforced his own top. The black move A for white B has become quite a bad exchange.
]))
(;W[pc]C[This is not so good for white.

]
;B[nb]C[Black should cut.]
;W[nc]
;B[nd]
;W[oc]
;B[lb]
;W[md]
;B[lc]C[White is overconcentrated.]))
(;B[pd]C[This is the best answer.]
(;W[nc]
;B[pc]
;W[lc]C[White's bad exchange is worse than black's bad exchange. Black is a bit better.]
;AE[mb][mc][pc][qc]C[Let's compare the exchanges of white and black.]
;W[qc]
;B[pc]C[This exchange is very bad for white.]
;B[mc]
;W[mb]LB[qc:A]C[This exchange is also bad for black, but not as bad as white's move at A.
White's move at A was extreme aji keshi, destroying aji and giving points to black. 
])
(;W[pc]C[White can consider this.]
;B[nc]
(;W[nb]
;B[oc]
;W[ob]
;B[lc]
;W[oe]
;B[rd]C[Black is good. Difficult to fight for white.])
(;W[oc]
;B[nb]
;W[of]
;B[rd]
;W[kc]
;B[me]C[Black has a good fighting position. White is too busy; he is split into 2 weak groups.
])))))
