(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[0.00] PW[White]PB[Black] ;B[pd] ;W[dp] ;B[qp] ;W[dd] ;B[oq] ;W[dj] ;B[fc] ;W[df] ;B[db] ;W[qj] ;B[fq] ;W[dn] ;B[dr] ;W[qm] ;B[cq] ;W[nc] ;B[qf] ;W[hc] ;B[cc] ;W[ec] ;B[eb] ;W[fd] ;B[be] ;W[go] ;B[pb] ;W[ki] ;B[md]C[This was the position. This move aims to take advantage of the potential cut at G16. Note how Lee takes advantage of the potential ladder (and breaker)] (;W[nd]C[The simplest of white's replies, but gets him really nowhere.] ;B[mf] ;W[me] ;B[le] ;W[ne] ;B[kg] ;W[og] ;B[mh]LB[fb:C][gc:B][gd:A][ge:D]C[after the sequence of Black A, white B, black C, white now cannot capture with a ladder with D. This is too good for black as the corner in the upper right is safe and so white's stones aren't doing much at all.]) (;W[mc]C[This is a submissive move] ;B[ld] ;W[nd] ;B[mf]C[Black's stones will not get captured, and white has lost a significant amount of influence in the center.]) (;W[ld]C[This was the real game move.] (;B[mc]C[if black replies by capturing the 1 stone, ] ;W[me] ;B[nd] ;W[kf]C[Then he has fallen to white's wishes. Now white has seized total control of the center, and the cut at G16 is effectively gone. I likely would have played like this in a real game though as the corner profit is quite large.]) (;B[gd]C[This was the real game situation. Instead of replying to the contact move, Lee probes first.] ;W[gc] ;B[fb] ;W[ge] ;B[le]C[Due to the ladder, white cannot play as comfortably. It's a burden.] ;W[kd] ;B[mc] ;W[me] ;B[mf] ;W[ne] ;B[nd] ;W[nf] ;B[ke] ;W[mb] ;B[od] ;W[je] ;B[mg] ;W[kg] ;B[jf]C[This move!] ;W[kf] ;B[lf] ;W[jd] ;B[ng]C[Huge result for black.] ;W[bf] ;B[ce] ;W[cf] ;B[bo] ;W[bn] ;B[co] ;W[cn] ;B[jj]C[Black begins a 2nd reduction. Now, this stone.. really can't get attacked by white effectively.] (;W[kl]C[If white tries to come crudely at it by swallowing him in whole in the center,] ;B[kj] ;W[lj] ;B[lk] ;W[kk] ;B[li] ;W[mj] ;B[kh] ;W[ji] ;B[jg]LB[jm:A]C[White collapses. In addition, a 3rd shoulder hit at A is left.]) (;W[lk]C[an even larger scale move, but] ;B[jl]C[Black simply just hops out. There's also a good followup move for black at K12.]) (;W[kj]C[This is how the real game played out] ;B[jl] ;W[gq] ;B[kk] ;W[ik] ;B[jk] ;W[fr] ;B[er] ;W[fp] ;B[hi] ;W[ih] ;B[gk] ;W[mq] ;B[ko] ;W[jq] ;B[rn]C[black settles his group in the center somewhat, and has 4 rather large corners. Black is now comfortably ahead.]))) (;W[kd] (;B[mc] ;W[lf]C[LCH Thought this might be a reasonable way for white to play. In exchange for the corner, white seizes the center. However, the opponent in this game was Seo bong soo, who heavily prefers contact fighting - which is why he thinks white didn't want to play this way.]) (;B[kf]C[Black can move in with the cap directly, once again aiming at the ladder. after this, a huge fight will likely occur.])))