(;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[ld]
;W[pg]C[After this move by white, do you know the right way to play for black?]
;B[oe]
;W[ne]
;B[of]
(;W[pd]C[This is one of the joseki possibilities. Today we will stick to this move and we will show tricky moves that black can play in this common joseki.]
;B[qf]
;W[qc]
;B[qe]
;W[nf]C[In this position, black has one obvious and correct move. The extension.

However, there are also two other ways in which black can try to trick white.]
(;B[og]C[This extension is joseki.]
(;W[pb]C[Playing here is most common. ]
;B[qk]C[The end of joseki.])
(;AW[dp][fq]
;W[rc]LB[dp:A][fq:B]C[When the ladder is good for white (see white A & B), this is also possible.]
;B[nd]C[When the ladder is good for white, this cut does not work for black.
Black can sometimes still play it though, in order to afterwards create a ladder breaker.]
;W[md]
;B[nc]
;W[mc]
;B[ob]C[In this position, white can play a common joseki move. But white can also try to trick black.]
(;W[oc]C[The common move for white.]
;B[nb]
;W[mb]C[Like this white captures black.]
;B[pb]
;W[pc]
;B[me]
;W[kb]
;B[kc]
;W[lb]
(;B[mf]C[This move creates a ladder. However in this case white will extend]
;W[ng]C[A terrible result for black, because the ladder does not work.])
(;B[ep]C[Black can sometimes try this type of strategy. This is a ladder breaker. White needs to be careful.]
;W[eq]C[The normal move for white suddenly makes the top a disaster.]
;B[mf]C[Now the ladder works for black. 
This means that white's corner is dead.]
;W[ng]
;B[nh]
;W[mg]
;B[lg]
;W[mh]
;B[mi]
;W[lh]
;B[kh]
;W[li]
;B[lj]
;W[ki]
;B[ji]
;W[kj]
;B[kk]
;W[jj]
;B[ij]
;W[jk]
;B[jl]
;W[ik]
;B[hk]
;W[il]
;B[im]
;W[hl]
;B[gl]
;W[hm]
;B[hn]
;W[gm]
;B[fm]
;W[gn]
;B[go]
;W[fn]
;B[en]
;W[fo]
;B[fp]C[White is captured. ]))
(;W[nb]C[This is a trick move!]
;B[oc]
;W[pc]
;B[mb]
;W[na]C[If black will know how to play, it will be a great result for black. 
But the black moves to refute this trick play are not obvious.]
;B[lc]
;W[me]
;B[oa]
;W[lb]
;B[ma]
;W[kb]C[The situation looks dangerous for black.

Black will have to play a brilliant tesuji to turn the tables.]
(;B[ra]C[Black can think about this move to start a capturing race in the corner.
This move is quite effective, but black can not play it immediately.

It will result in a ko, but a ko that white can't lose in the opening.]
;W[qa]
;B[qb]
;W[pb]
;B[pa]
;W[rb]
;B[qa]
;W[nb]
;B[rd]
;W[la]
;B[na]
;W[sa]
;B[sb]
;W[sc]
;B[pe]C[Black gives atari. But white can take first.]
;W[sa]C[The saying says "there is no ko in the opening". Black has no sufficient threats to compensate this loss. A great result for white.])
(;B[kd]C[This move is the first key move to refute white's trick.]
(;W[pb]C[When white starts a capturing race, black should find another tesuji.]
(;B[lg]C[This move is a tesuji to create a net.
Playing it now though is a mistake.]
;W[nb]
;B[ng]
;W[la]
;B[na]
;W[pa]C[Black has been captured. White's trick was a great success.])
(;B[jb]C[The second brilliant move.]
;W[jc]
;B[kc]
;W[ib]LB[ja:B][la:A]C[These exchanges ensure a lack of liberties for white. Before white can play at A, white will have to capture the black stone at B first. 
Therefore black has gained 1 extra liberty in the capturing race.]
;B[lg]C[Now the net works for black.]
(;W[nb]
;B[ng]
;W[pa]
;B[na]
;W[ja]C[White has to take this stone first before giving atari to black.]
;B[le]C[But now white comes too late. Black has countered white's trick play in great style! This is a disaster for white.])
(;W[mg]C[Note that white can not run out.]
;B[mh]
;W[lf]
;B[kf]
;W[lh]
;B[ng]
;W[kg]
;B[le]C[Black creates a lack of liberties for white.])))
(;W[ng]C[When white knows the net, white can try to escape. ]
;B[ra]LB[jb:A]C[Now however black can capture the corner, because black still has the tesuji at A up his sleeve. It ensures that black wins the capturing race by 1 liberty.]
;W[oh]
;B[qh]C[A good result for black. Black has successfully countered white's trick play!]
;W[qa]
;B[jb]
;W[jc]
;B[kc]
;W[ib]
;B[qb]
;W[pb]
;B[pa]
;W[rb]
;B[qa]
;W[nb]
;B[rd]
;W[ja]
;B[pe]
;W[la]
;B[na]
;W[sa]C[This move no longer works.])))))
(;B[nd]C[This is a trick move. ]
;W[md]
;B[nc]
;W[mc]
;B[ob]C[After this shape move of black, white needs to be careful.]
(;W[mb]C[A mistake!]
;B[pc]LB[me:1][og:2]C[When black cuts, white is left with 2 cuttingpoints.]
;W[le]C[When white defends the most urgent cuttingpoint, black will take the other one.]
;B[og]C[Black wants this variation. Black has big corner territory and has the better result.])
(;W[pb]C[This move is correct. 
It will result in influence towards the center for white + a living group of white in the corner.]
;B[mb]
;W[lc]C[White will extend here several times, forcing black to crawl on the second line (because black has a lack of liberties).]
;B[lb]
;W[kc]
;B[kb]
;W[jc]
;B[jb]C[At this moment, white can switch.]
;W[og]C[This block is sente towards the right side.]
;B[rh]C[Black needs to defend the right and slides.]
;W[ic]C[Now white comes back to the top and can extend again.]
;B[ib]
;W[rb]C[After this, white makes life in the corner.]
;B[rd]
;W[qa]C[White has a good result. Black's trick play has successfully been countered.]))
(;B[rc]C[This is the second trick move.]
(;W[nc]C[Playing this move looks like joseki. But it is a mistake.
This is what black wants.]
;B[og]
;W[qb]LB[nf:1][og:2]C[However, if we evaluate this position we can see that white has made a very bad exchange with white 1 for black 2.]
;AE[qb][nc][qc][rc][pd][ne][oe][qe][nf][of][qf][og]
;B[oe]C[We can compare the shape with an old joseki sequence.]
;W[ne]
;B[of]
;W[pd]
;B[qf]
;W[qc]
;B[qe]
;W[nc]C[In the old joseki sequence white plays here to settle quickly.]
;B[rc]
;W[qb]LB[nf:1][og:2]C[This is playable, although not seen often in modern go. Note however that the big difference here is that white did not make the exchange of 1 for black 2.]
(;W[nf]C[Playing here now is very crude.]
;B[og]C[It does not contribute much to white's position, but it strengthens black on the right side.])
(;W[qh]C[Without the exchanges white can later think about attacking black in this area. ]))
(;W[og]C[White should play here to punish black's overplay.]
;B[nd]C[Black has to cut.]
;W[md]
;B[nc]
;W[mc]
;B[ob]C[Not that in this shape white should extend on the second line.]
;W[mb]C[Now this move is good.]
;B[pc]
;W[le]C[White is better. Black's trick play has failed.])))
(;W[qc]C[It is slightly more modern to attach here immediately.]
(;B[qf]C[Black can still play this shape point]
;W[pd]C[And like this it would return to the old joseki.])
(;B[pd]C[Black can also bump here.])
(;B[nd]C[And sometimes black can even cut immediately.])))