(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[백 JungHwan Park(9P)]PB[흑 WeiXing Tang(9p)]C[2014 Samsung cup semi final 1st game.
5th November , 2014
Black - Tang wei Xing 9p . China
White -  Park jung hwan 9p. Korea
Tang won the Samsung cup last year, winning against Lee Sedol in the finals.

The semi finals is a best of three.
This is the first game.
]
;B[qd]
;W[dp]
;B[pq]
;W[dd]
;B[fc]
;W[cf]
;B[lc]
;W[qn]
;B[qp]
;W[pj]
;B[qh]
;W[on]
;B[mp]C[This is a popular opening.

In this case white can consider 4 options.
There are two general directions of play: the top, or the right side.]
(;W[hc]C[The game. Also a good move on the upper side, but more tight.]
(;B[pl]C[What is the meaning of this move?
]
(;W[ql]C[The natural move.]
(;B[db]LB[fe:A]C[We saw that jumping out at A instead was not good, this is a better strategy]
;W[cc]
;B[ed]
;W[gd]C[An interesting move. This puts black under pressure. Black needs to be careful!

]
(;B[de]C[This was the game and it was an overplay. Tang Weixing probably misread something.
]
;W[ee]C[A strong move. And the only move.]
;B[ce]
;W[df]LB[gd:A]
;B[bd]
;W[ec]
;B[fd]
;W[fe]
;B[fb]
;W[cb]
;B[bf]
;W[eb]
;B[cg]
;W[od]
;B[ib]
;W[gb]
;B[qf]
;W[fq]
;B[jq]
;W[ck]
;B[qk]
;W[pk]
;B[ol]
;W[rk]
;B[qm]
;W[rl]
;B[rm]
;W[pm]
;B[rn]
;W[ri]
;B[nk]
;W[me]
;B[pc]
;W[ke]
;B[lf]
;W[le]
;B[nb]
;W[mn]
;B[ll]
;W[kn]
;B[jm]
;W[kp]
;B[kq]
;W[jp]
;B[lp]
;W[ip]
;B[iq]
;W[hp]
;B[km]
;W[op]
;B[oq]
;W[dg]
;B[ch]
;W[dh]
;B[ci]
;W[di]
;B[cj]
;W[dk]
;B[dj]
;W[ej]
;B[ek]
;W[fj]
;B[bk]
;W[bl]
;B[aj]
;W[cm]
;B[cq]
;W[cp]
;B[hj]
;W[gl]
;B[gk]
;W[fk]
;B[hl]
;W[gm]
;B[hm]
;W[lo]
;B[er]
;W[fr]
;B[dq]
;W[bp]
;B[bq]
;W[aq]
;B[ar]
;W[bs]
;B[eq]
;W[ds]
;B[es]
;W[cr]
;B[fp]
;W[gq]
;B[ep]
;W[go]
;B[gn]
;W[fn]
;B[hr]
;W[fs]
;B[hn]
;W[fo]
;B[gp]
;W[hq]
;B[ho]
;W[br]
;B[ap]
;W[eo]
;B[bo]
;W[do]
;B[aq]
;W[lq]
;B[mq]
;W[lr]
;B[mr]
;W[nn]
;B[dr]
;W[cs]
;B[cn]
;W[dn]
;B[fm]
;W[an]
;B[bn]
;W[bm]
;B[fl]
;W[el]
;B[mm]
;W[ln]
;B[jo]
;W[ko]
;B[jd]
;W[pe]
;B[qe]
;W[rh]
;B[rg]
;W[lh]
;B[bc]
;W[bb]
;B[og]
;W[ng]
;B[nh]
;W[mg]
;B[ki]
;W[ih]
;B[ic]
;W[hi]
;B[if]
;W[ij]
;B[jg]
;W[of]
;B[ji]
;W[gj]
;B[hk]
;W[ii]
;B[kg]
;W[oh]
;B[pg]
;W[ni]
;B[oi]
;W[oj]
;B[ph]
;W[nj]
;B[ea]
;W[dc]
;B[mi]
;W[li]
;B[mj]
;W[lj]
;B[mk]
;W[mh]
;B[pi]
;W[oh]
;B[as]
;W[cs]
;B[nh]
;W[qi]
;B[ok]
;W[oh]
;B[em]
;W[dm]
;B[nh]
;W[qj]
;B[kk]
;W[oh]
;B[gf]
;W[gc]
;B[nh]
;W[kf]
;B[lg]
;W[oh]
;B[fg]
;W[jk]
;B[kj]
;W[he]
;B[gh]
;W[gi]
;B[nh]
;W[mf]
;B[ne]
;W[mc]
;B[nc]
;W[nd]
;B[ig]
;W[mb]
;B[ld]
;W[md]
;B[ie]
;W[oh]
;B[ei]
;W[am]
;B[nh]
;W[na]
;B[ob]
;W[oh]
;B[ao]
;W[eh]
;B[nh]
;W[pf]
;B[qg]
;W[oh]
;B[fh]
;W[fi]
;B[nh]
;W[qb]
;B[pb]
;W[oh]
;B[ef]
;W[be]
;B[ae]
;W[cd]
;B[be]
;W[ik]
;B[nh]
;W[rc]
;B[rd]
;W[oh]
;B[eg])
(;B[ef]C[jumping is not good]
;W[dc]
;B[ec]
;W[cb]C[It is hard to find a good continuation for black now]
;B[gg]
;W[kd]
;B[ld]
;W[kf]
;B[le]
;W[fe]
;B[ee]
;W[ff]C[There is still a cut here])
(;B[ee]C[Therefore black is supposed to play like this.]
(;W[dc]C[When white now plays the same sequence, it is a bit different]
;B[ec]
;W[cb]
;B[dg]
;W[df]
;B[ef]
;W[eg]
;B[fg]
;W[eh]
;B[gf]
;W[kd]
;B[ld]
;W[ke]
;B[fi]C[A fight follows])
(;W[eg]C[This move seems like white is attacking black's group. But actually, if black can find the proper response, black will have a good result.
]
(;B[fg]C[This leaves black with bad shape.]
;W[ef]
;B[ff]
;W[fe]C[White aims to cut!])
(;B[ge]C[Black gets bad shape again.]
;W[he]
;B[gf]
;W[hf]C[White is pushing from behind, but..]
;B[gg]
;W[hg]
;B[gh]C[Good for white.]
;W[ii]
;B[gj]
;W[od]C[White grasps the initiative.])
(;B[ef]C[This is a very good move.]
(;W[fg]C[Looks normal, but the result will be terrible for white.]
;B[ce]
;W[de]
;B[df]
;W[dg]
;B[cd]
;W[dc]
;B[bc]
;W[cb]
;B[bf]
;W[cg]
;B[bb]
;W[eb]
;B[ec]
;W[da]
;B[ba]
;W[ca]
;B[fb]C[White dies.])
(;W[dg]C[The proper move.]
(;B[gf]C[A good move.]
;W[fg]
;B[ge]
;W[kd]
;B[ld]
;W[ke]
;B[le]
;W[kf]
;B[jc]C[However this is quite a success for black. Black is taking away white's base and feels comfortable])
(;B[fg]C[Also good.]
;W[fh]
;B[gf]
;W[gh]
;B[id]C[Black attacks white on the vital point.]
;W[he]C[Note that black's move makes it very difficult for white to move out.]
;B[hd]C[Black can cut.]
;W[ge]
;B[gc]C[Very good for black.])
(;B[ce]C[Note that in the fighting to come, black always has this move in reserve. This can be played in sente and is big aji.]
;W[de]
;B[df]
(;W[be]
;B[cg]
;W[bf]LB[ch:A]C[Black can potentially cut white by playing at A.])
(;W[bf]C[White can not defend like this]
;B[cg]
;W[ch]
;B[be]
;W[bg]
;B[cd]
;W[dc]
;B[bc]
;W[cb]
;B[bb])))))))
(;
(;W[rj]LB[pl:1][ql:2]C[With this exchange of black 1 for white 2, the move on the second line for white afterwards becomes less interesting, because it leaves aji in the position. ]
(;B[qm]C[Black has aji here...])
(;B[qk]LB[rj:A]C[Or here. So white will have to look at other defending moves instead of A.]))
(;W[pm]LB[rj:C][pl:A][ql:B]C[This defending move will become more natural for white instead.

Therefore the exchange of black A for white B decreased the chance that white will play at C later.])))
(;AE[pl]LB[pl:A]C[If black doesn't play at A...]
;W[rj]LB[qf:B][pl:A]C[Without the black stone at A. White will defend here, aiming at B]
;B[pl]SQ[rj]C[When black plays this move now, with the marked stone in place]
(;W[ql]C[White will probably not answer submissively here.])
(;W[ol]C[But instead attack!])))
(;B[fe]C[This is not good for black, it's white's intention!]
;W[ec]
;B[fb]
;W[he]
;B[fg]
;W[hg]
(;B[fi]
;W[di]C[Too easy for white.])
(;B[dh]C[This is a better move for black than jumping out. 
When black plays here, white should be careful to find the right move!]
(;W[gi]C[White would like to play here, but playing it immediately is too hasty. This is a mistake.]
;B[cc]
(;W[ef]C[Playing here now comes too late, black will not answer.]
;B[eb]SQ[fg][dh]C[Black takes a huge corner. An eventhough white can cut off the black marked stones, they are flexible. ]
;W[ff]
;B[cl]C[Black will jump here.]
;W[cn]
;B[el]C[Black is out of danger.])
(;W[eb]
;B[cd]
;W[de]
;B[be]
;W[bf]
;B[db]SQ[dd][de][cf]C[Black makes life and white's marked group became weak.]))
(;W[ef]C[White should peep here first! It is crucial to defend the corner. Now, black can't get a good result.]
;B[ff]
;W[gi]TR[ef]C[The △ move is an important exchange. Black now has little aji in the corner.
]
;B[cc]
;W[eb]
;B[cd]
;W[ce]LB[fg:A]C[White is ok. Black's group at A is under pressure.
Black might be able to live in the corner, but it will hurt the outside.
He has no time to live in the corner.]))))
(;W[rj]LB[qf:C][pl:B][ql:A]C[This move is the most peaceful move of the 4. It strengthens white's base on the right side.
Invasion moves like A or B for black are now defended against. Also, white's move aims to invade at C more easily later.])
(;W[qf]C[Another possible move on the right side.
This move is the most difficult amongst the 4 and complicates the game immediately. ]
(;B[pe]C[Black pressures the white stone.]
;W[pf]
(;B[oh]C[Jumping here for black will result in a running fight.]
;W[of]
;B[od]C[Note this beautiful shape move of black to attack white and solidify the corner.]
;W[qj]LB[rh:A]C[Complicated fighting. White takes away black's base and also aims to connect underneath with A.])
(;B[of]C[Also possible]
(;W[ph]C[A normal looking move, but it is slack.]
;B[pg]
;W[qg]
;B[og]
;W[qi]
;B[rh]
;W[ri]
;B[oh]
;W[pi]
;B[fe]LB[rd:A]C[This result is good for black.
These days White doesn't play like this anymore.

Note that white can not clamp at A anymore in this position.]
;W[rd]C[This clamp comes too late.]
;B[qe]C[Black can cut.])
(;W[rd]C[This is an interesting timing move.
It has a clever meaning.]
(;B[rc]C[Answering here for black feels normal, but it's too good for white.]
;W[re]
;B[pc]
;W[ph]
;B[pg]
;W[qg]
;B[og]
;W[qi]C[Enough for white.
If we compare this to the previous diagram, we can see that white gained about 10 points.]
;AE[pc][rc][rd][re]AW[pi][ri]AB[oh][rh]LB[rd:A]C[This was the previous diagram. Like we saw, white can not play at A anymore, so this is much worse for white.])
(;B[og]C[That's why black has to play here.]
;W[qe]
;B[pd]
;W[rc]
;B[qb]
;W[rb]
;B[fe]C[This is an even result.]))))
(;B[qj]C[Also possible. 
Like this black will get territory on the right side and white will invade the top.]
;W[qk]
;B[pi]
;W[rj]
;B[qi]C[An ugly move, white has no time to defend though]
;W[qc]C[And invades the corner.. A testing move.]
;B[pc]
;W[pd]
;B[qb]
;W[rc]
;B[pe]
;W[od]
;B[qe]
;W[oe]
;B[pf]
(;W[of]C[This is not sente, so it is a mistake for white.]
;B[ob]
;W[pg]
;B[qg]C[Black got the right side and the top.])
(;W[nb]C[White has to play here.]
(;B[pb]
;W[rb]
;B[ra]
;W[kc]LB[lb:A][ld:B]C[This is, surprisingly, a common variation.
White creates a sort of miai of connecting above at B or underneath at A])
(;B[ob]C[Also possible, from a pro-game: https://badukmovies.com/pro_games/47852-lian-xiao-lee-donghoon?move=21]
;W[oc]
;B[pb]
;W[mc]
;B[rb]
;W[ld]
;B[kc]
;W[kd]
;B[ic]))))
(;W[id]C[Instead of playing on the right side, invading the top is also good direction.]
(;B[fe]C[Jumping here is a bit too much.]
;W[ig]
;B[fg]
;W[od]C[This is white's intention. Black has 3 thin positions and feels a bit busy.])
(;B[od]LB[qf:A]C[So, black usually answers by securing the upper right corner. Note that this also protects against the invasion at A.])))