(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
MULTIGOGM[1]
;B[pd]
;W[dp]
;B[pq]
;W[dd]
;B[fq]
;W[cn]
(;B[jq]C[Today the topic is this tricky opening!]
;W[qn]C[This approach is normal.]
(;B[ql]SQ[jq]C[This is a common pincer, but with the marked stone in place black can choose another more tricky variation. In this case this move is not good.]
;W[qq]
;B[qp]
;W[pp]
(;B[rq]C[When black plays the normal joseki it will be good for white]
;W[qr]
;B[po]
;W[op]
;B[qo]
;W[nq]C[White plays this special move. We will also talk about this variation later])
(;B[qr]C[Instead black can try this tricky variation..]
;W[rq]
;B[po]
;W[op]
;B[qo]
;W[oo]
;B[pn]
;W[on]C[however white can push here, which is crucial and white can handle the situation.]
;B[pm]
;W[oq]
;B[pr]
;W[rr]C[White captures black]
;B[or]
;W[nr]
;B[mr]C[black can not escape]
;W[ns]C[White simple connects]
;B[nq]
;W[mq]
;B[np]
;W[mp]
;B[no]
;W[nn]LB[on:A]C[The ladder is good for white.
Note that white needed the push at A for this ladder to work.]))
(;B[pl]C[Black must play this pincer.]
;W[qq]
;B[qp]
;W[pp]
(;B[rq]SQ[jq]C[this is normal joseki, but not good in this case, with the marked stone in place]
;W[qr]
;B[po]
;W[op]
;B[qo]
(;W[nq]SQ[jq]C[this is a good special answer, when the marked stone is close like this.]
;B[rr]
;W[pr]LB[hq:A]SQ[jq]C[If black plays the normal joseki, white is good.
Because the marked stone is in a bad position now.
There is a hole at A which is dangerous now that white has become so strong on the lower right side.])
(;W[rr]C[Not good in this case]
;B[or]SQ[jq]C[Later this move is powerful now that black has a stone at the marked position]
;W[nr]C[white could connect his stones]
;B[nq]
;W[oq]
;B[mr]
;W[pr]
;B[ns]LB[pq:A]C[But the result is very painful, also because A is not an eye]))
(;B[qr]C[black must play here.]
;W[rq]
;B[po]
;W[op]
;B[qo]C[This is tricky and leads to an interesting position.]
(;W[pr]C[Not good for white]
;B[oq]
;W[or]
;B[nq]
;W[rr]
;B[nr]LB[rp:A]C[Black is too strong on the outside.
A is also sente.]
;W[nc]
;B[rp]
;W[qf]
;B[qs]
;W[rs]
;B[sq]C[White died])
(;W[oo]C[white can think of this move, but it is also not very good.]
(;B[rr]C[It is too hasty for black to capture immediately]
;W[oq]
;B[pr]
;W[pn]
;B[rp]
;W[ro]
;B[sq]
;W[nm]C[white is wonderful.
black did not get enough in the corner])
(;B[pn]C[black's best answer.]
(;W[pr]
;B[oq]
;W[nq]
;B[or]
;W[nr]
;B[ps]
;W[rr]
;B[rs]
;W[ns]
;B[os]
;W[ss]
;B[sr]
;W[sq]C[white can make a ko. but after this, white have to spend many moves.
This is good for black.]
;B[rp]
;W[ss]
;B[do]
;W[qs]
;B[co]
;W[pr]
;B[ep]C[black is good.])
(;W[on]LB[pl:A][ql:B]C[In the previous variation, where A was placed at B, this push was sente.
But now it is not, therefore this push, and the whole variation, is no longer good for white.])))
(;W[oq]C[this is the best move.]
;B[pr]
(;W[rr]C[whie can think this way. this is the most complicated variation.
but black is not bad.]
;B[or]
;W[nr]
(;B[mr]C[good move]
(;W[nq]
;B[ns]LB[jp:A]SQ[jq]C[now black needs his marked stone.
If the stone had been at A instead, like in the Kobayashi opening, this would not be good for black.]
;W[lq]
;B[kr]C[black can connect]
;W[lr]
;B[ls]
;W[mq]
;B[ms]C[black wants to make this variation.]
;W[os]
;B[ps]
;W[rs]
;B[ks]
(;W[ro]C[White can try to live, but it is painful.]
;B[rp]
;W[sp]
;B[rn]
;W[so]
;B[pn]
;W[qm]
;B[rm]
;W[ql]
;B[qk]
;W[rl]
;B[rk]
;W[sm]
;B[pm]
;W[sn]
;B[jo]
;W[ln]
;B[oj]C[black is good.])
(;W[jp]
;B[ip]
(;W[kp]
;B[io]
;W[ro]
;B[rp]
;W[sp]
;B[rn]
;W[so]
;B[pn]
;W[qm]
;B[rm]
;W[ql]
;B[qk]
;W[rl]
;B[rk]
;W[sm]
;B[pm]
;W[sn]
;B[kn]C[black is good.
white can't fight.])
(;W[qm]C[white wants to try something. but also overplay.]
;B[pn]
;W[pm]
;B[om]
;W[on]
;B[rn]
;W[rm]
;B[oo]
;W[nn]
;B[no]
;W[mo]
;B[mn]
;W[nm]
;B[lo]
;W[mp]
;B[mm]
;W[ol]
;B[nl]
;W[om]
;B[lp]
;W[rp]
;B[ro]
;W[sn]
;B[kq]
;W[so]
;B[np]C[Black wins])))
(;W[ns]C[overplay.]
;B[nq]
;W[oo]
;B[pn]
;W[mq]
;B[np]
;W[lr]
;B[no]
;W[on]
;B[nm]C[white has been captured in a net]))
(;B[nq]
;W[oo]LB[pn:A][mq:B]C[black can't cut. A and B are miai]))
(;W[kq]LB[rr:A]C[this is best move. and simple.
This move aims at gaining some reinforcements to play at A and capture black.]
(;B[rr]C[Black needs to defend]
;W[jr]
;B[iq]
;W[ir]
;B[hq]
;W[kp]C[white is a little bit better. 
white is stronger than black. 
white breaks the trick opening like this.
])
(;B[kr]
;W[lr]LB[jr:A][rr:B]C[black can't fight.
white will get A or B.
white is good.]))))))
(;B[jp]C[Most of you will know the Kobayashi opening]))