(;SZ[19]FF[4]AP[GOWrite:2.0.05]GM[1]CA[UTF-8]PB[Demytro (Ukraine)]GN[ ]KM[5.5]PW[Victor Chow (RSA)]
;B[dp]
;W[pd]
;B[dd]
;W[qq]
;B[pp]
;W[qp]
;B[po]
;W[or]
;B[mp]
;W[rn]
;B[pl]
;W[cj]
;B[cl]
;W[cf]
;B[ch]
;W[ef]
;B[fd]
;W[bd]
;B[cc]
;W[di]
;B[jc]
(
;W[nc]
;B[dh]
;W[eh]
;B[ei]
(
;C[Here white has two main alternative.  ]W[ej]
;B[eg]
;W[fi]
;B[fh]
;W[ei]
;B[dg]
;W[fg]
(
;B[ff]
;W[gh]
;B[df]
;W[gf]
;C[Compare this result with the previous variation, black is stronger, but white get the important sente.  ]B[fe]
;W[cn]
;B[dn]
;W[cq]
(
;C[This move is somehow not as strong.]B[dq]
;W[cp]
;B[co]
;W[bo]
;B[do]
;C[Now white regained some territory. ]W[bn]
(
;C[This move went to wrong sie again.  ]B[dm]
(
;C[Anyway, now white is ahead, so he played safe move.]W[lq]
;B[jq]
;W[lp]
;C[This will be black's best option, by keep bottum side territory, black can hope that if white's attack at right side is not fruitful, then black will regain lead on territory. ]B[jo]
;W[mn]
;B[lo]
;W[mo]
;B[ln]
;W[mm]
;B[np]
;W[mr]
;B[nl]
(
;W[lm]
;B[jm]
;W[jl]
;B[il]
;W[kl]
;C[This is too greedy, defend at right side is important.]B[ik]
;C[now white's lead become overwhelming. ]W[pj]
;B[nj]
;W[lj]
;B[pi]
;W[qi]
;B[oi]
;W[qh]
;B[qn]
;W[rm]
;B[mh]
;W[kh]
;B[jj]
;W[lh]
;B[mi]
;W[kj]
;B[mf]
;W[on]
;B[qm]
;W[qk]
;B[pk]
;W[ng]
;B[mg]
;W[pg]
;B[kf]
;W[ih]
;B[lc]
;W[bi]
;B[bh]
;W[fm]
;B[gn]
;W[dr]
;B[er]
;W[cr]
;B[fk]
;W[el]
;B[qc]
;W[qd]
;B[rd]
;W[re]
;B[rb]
;W[pc]
;B[pb]
;W[ob]
;B[sc]
;W[pa]
;B[qb]
;W[se]
;C[white gives up the ko at the corner, as he already saw the sequence to break down black's territory at bottum side. ]B[sd]
;W[lb]
;B[kb]
;W[dl]
;B[cm]
(
;C[This could be a wrong sequence, but it will not cost white the game. ]W[fr]
;B[es]
(
;W[fp]
;B[fq]
;W[gq]
;B[eq]
;W[fn]
;C[now white's error in sequence will cost white the game now, but if white remain calm from here, then he can still hope for a tight end-game battle.  ]B[go]
(
;W[ip]
;B[jp]
;W[in]
;B[jn]
;W[fo]
;B[gp]
;W[hm]
;B[gm]
;W[gl]
;B[hl]
;W[gk]
;C[now with al white stones dead inside, black is clearly ahead. ]B[hq]
)
(
;W[jr]
;B[ir]
;W[kr]
;B[hq]
;W[fo]
;B[gp]
;W[gm]
;B[hm]
;W[hl]
;B[im]
;W[ld]
;B[md]
;W[mc]
;B[kc]
;W[me]
;B[le]
;W[nd]
;B[kd]
;W[he]
;B[hd]
;W[je]
;B[ke]
;W[id]
;B[ic]
;C[if white managed to play this variation, the game is still very close, the margin for either side is about 0.5 point.  ]W[hk]
)

)
(
;C[even now, white simple push wil be good.]W[fn]
(
;B[fo]
;W[fp]
;B[fq]
;W[gq]
;B[eq]
;W[go]
;B[eo]
;W[ip]
;B[jp]
;C[if black dare to stop white, then this sequence will destroy black's territory at bottum. ]W[hm]
)
(
;B[go]
;W[eq]
;B[fq]
;W[ep]
;B[eo]
;W[fp]
;B[fo]
;W[gq]
;B[gp]
;W[fq]
;B[hq]
;C[if black pull back at 121 here, then the cut at 122 will declare a win for white immediately.]W[hr]
)

(
;B[fq]
;W[go]
(
;B[ho]
;W[hn]
;B[gp]
;W[hm]
;B[im]
;W[io]
;B[fo]
;W[in]
;B[ip]
;W[jn]
;B[kn]
;C[After all, the best black can do is to retreat to 121, then the hane at 122 is very strong, if black try anything such as 123, then white has all sort of plays. ]L[km][kp]W[gm]
)
(
;B[hp]
;W[ho]
;B[io]
;W[gq]
;B[hq]
;W[fp]
;B[eq]
;W[gp]
;B[gr]
;W[in]
;B[hn]
;W[hm]
;B[im]
;W[gm]
;C[all black can do is to hold his own position, but with this type of profit, white can score a easy win. ]B[jn]
)

)

(
;B[gp]
;W[fp]
;B[fo]
;W[eo]
;B[go]
;W[eq]
;B[ep]
;C[if black try 121 here, then white have this neat sequence]W[fq]
)

)

)
(
;W[fn]
;B[gp]
;W[fr]
;B[fq]
;W[es]
;B[gr]
;W[eq]
;B[ep]
;W[fo]
;C[simple play 118 here will reduce black's territory.  If white continues from here, white can easily acheive a lead as black will not have sufficient territory for komi.]B[fp]
)

)
(
;W[jn]
;B[in]
;W[jm]
;B[ko]
;C[the attachment at 60 is a sharp tetsuji, and the result till 64 here is much better than white's shape in the game.]W[lm]
)

)
(
;C[This could be a much better option for white, the black stick at bottum left could endup in trouble as they do not have two eyes yet. ]W[iq]
)

)
(
;B[jq]
;W[dm]
;C[Black should play at bottum side with 47, if white come out from 48, then sacrifice the stone at left is good for black.  If white continues to play on here, the black bottum side will grow bigger and bigger. ]B[em]
)

)
(
;B[co]
;C[This is a better continuation for black, thereafter he can play away or continue locally with attack at A.]L[gq]W[eq]
)

)
(
;B[df]
;W[gh]
;C[this is a much better variation for black.  Although there are many plays against black's top side, but after 35 consolidate the corner, it is unclear where white to play to regain the territory lost at top left corner.]B[co]
)

)
(
;W[fh]
;B[ej]
;W[bh]
;B[ci]
;W[bi]
;B[bj]
;W[bk]
;B[ck]
;W[aj]
;C[This is one variation, white get connected, but black have a thickness in center, now white will have a great pain in decide where to play next, A or B.  Both give black some follow ups.  Furthermore, with the thickness here, black's co-ordination with the bottum right corner influence is great.]L[bj][dg]B[dj]
)

)
(
;C[According to the observing pro's opinion, this is a much more solid move. ]W[dh]
)

)