(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[AAA]PB[CHH]
;B[pd]
;W[dp]
;B[pp]
;W[dd]
;B[fq]
;W[dn]
;B[jp]
;W[qn]
;B[ql]
;W[qq]
;B[pq]
;W[qp]
;B[po]
;W[rn]
;B[om]
;W[jc]LB[lc:B][cf:D][ci:C][cl:A][fo:E]C[The starting position 

The following 5 alternatives are considered.  ]
(;B[cl]C[Variation A: "entering too rushed".

Black has to escape and with the sequence 3-10 White erodes Black's position naturally, which is very, very good.]
;W[ci]
(;B[el]
;W[fn]
;B[gp]
;W[eq]
;B[gl]
;W[hn]
;B[il]
;W[jn]LB[ci:18][cl:17][el:19][gl:23][il:25][fn:20][hn:24][jn:26][gp:21][eq:22])
(;B[co]C[Variation A1 - "greedy for small loses the big".
 
This black 19 aims to settle the position but after 20 -34 Black loses big. ]
;W[do]
;B[cn]
;W[dm]
;B[cp]
;W[cq]
;B[bq]
;W[br]
;B[dq]
;W[cr]
;B[dr]
(;W[cm]
;B[bp]
;W[bn]
;B[ar]
;W[bl])
(;W[bp]C[Variation A2 - "a turn of events" 
It is important that White does not give atari and then try to live in the corner. Black 31 is a vital point and White is forced to grovel (beg for life) with 32. Black 33 is an important point and Black is well-placed. ]
;B[cm]
;W[ds]
;B[dl]LB[dl:33][cm:31][bp:30][ds:32])))
(;B[lc]C[Variation B -"an unbeneficial battle".
 
Black prevents White's upper position from developing but White will connect on the left hand side after the exchange of 19 for 20. Black is then forced to invade the top side, and after the moves 21 - 28 is not satisfied: this is bad for Black.]
;W[di]
;B[fo]
;W[fm]
;B[fc]
;W[ec]
;B[fd]
;W[df]
;B[hc]
;W[je]
;B[gg]
;W[jg])
(;B[ci]C[Variation C -"Black is not satisfied" 

Black breaks open the left side; white 18 closes in. Black can easily secure life and superficially it looks as if Black is in a  good position after playing black 23. However with the moves 24 -28, White "shaves away " at the black position on the lower side, and this is not satisfactory for Black.  ]
;W[ck]
;B[cf]
;W[ce]
;B[df]
;W[fd]
;B[lc]
;W[ej]
;B[fh]
;W[gi]
;B[gh]
;W[hi])
(;B[fo]C[Variation E - "Almost the same as Variation C".

After the 17 - 18 exchange, Black is invited to invade. With black 19 - white 26, again White shaves away at the black position. ]
;W[dk]
;B[cf]
;W[ce]
;B[df]
;W[fd]
;B[ci]
;W[bj]
;B[ei]
;W[fk])
(;B[cf]C[Variation D - "Correct".

Black 17 keeps White's prospects in check. It also looks after Black's position at the bottom. 

It is hard to to imagine white 18, but then 19 -27 follow. The result is that Black gains the corner and the triangled stone is not well placed.]
(;W[di]
;B[cc]
;W[cd]
;B[dc]
;W[ed]
;B[bd]
;W[be]
;B[bc]
;W[ce]
;B[fc]TR[jc])
(;W[fd]C[Variation D2 -  "Black plays on both sides" 

17 - 21 settles the position and White must play 22. After the 23 - 24 exchange Black gets to play 25 to enlarge the position: this is a very good setup for Black.]
;B[bd]
;W[cc]
;B[ci]
;W[ck]
;B[fo]
;W[fm]
;B[il])
(;W[be]C[Variation D3 - "Actual game" 

With the last two diagrams, White was not satified so tried white 18. Black 19 is a very good move and after White invaded the lower side with 22 -34, Black got sente to play 35 and had a successful setup. Black won the game after 141 moves.  ]
;B[dj]
;W[hq]
;B[hp]
;W[iq]
;B[ip]
;W[jq]
;B[kq]
;W[gq]
;B[gp]
;W[eq]
;B[fr]
;W[fp]
;B[kr]
;W[er]
;B[fo]
;W[ep]
;B[fc])))
