(;FF[4]GM[1]SZ[13]AP[SGFC:1.13b]

GN[ch242424-ekenberg(B) IGS]
PB[ekenberg]
BR[30k]
PW[ch242424]
WR[30k]
KM[5.5]
DT[1999-10-12]
PC[IGS:  igs.joyjoy.net 6969]
RE[W+7.5]
TM[5400]
US[Brought to you by IGS]

;B[jd]C[Reviewed by yfh2];W[cj];B[dd];W[kj];B[jg]LB[kf:a][kg:b]
C[somewhat loose
Rather secure the corner with "a"
If you want to extend, "b" will prevent w sneaking into right side]
;W[cg];B[gg]LB[ce:a][gc:b][gk:c]C[too early
rather  1) secure corner with "a"/ top with "b"
2) invade bottom with "c"];W[gk]C[See ?
If its good for b, its good for w];B[gi]C[same comment : spoiled move
Does not create either
- threat (no w stone vulnerable from top)
- territory

better secure corner];W[cc]C[See ?
W can take away 10 points or so from b];B[cd];W[dc];B[ec];W[bd]
;B[be];W[ac];B[db];W[cb]
(;B[ae]C[Dangerous.
W can kill this.
Better secure top]
(;W[ad];B[eb];W[kh];B[kg];W[jh];B[ih];W[ii];B[hi];W[ij];B[hj]
;W[hk];B[fk];W[fl];B[ek];W[dk];B[dj]
(;W[bk]C[white missed a good point];B[ej]C[yes];W[ci];B[dh]
;W[ch];B[dg];W[cf]
(;B[df]C[from w 21, it was possible to kill corner :  see variation]
;W[ce]LB[bb:b][bf:w]C[b lost the game here, since the corner is alive (previously shown variations don't work : if b b12, then w b8)]
;B[de];W[lg];B[lf];W[li];B[mg];W[lh];B[hc];W[kc];B[kd];W[jc]
;B[ic];W[ld];B[le];W[mc];B[md]LB[lb:a]C[Weird ...
Rather "a"];W[me];B[jb];W[kb];B[mf]
(;W[md]C[w misses the opportunity to live];B[ka];W[la]C[same comment. w J12 instead of m13 can kill and live]
;B[mb];W[lc];B[ja];W[di];B[ei];W[ke];B[kf];W[mh];B[lb];W[da]
;B[ea];W[ca]C[at this time, it become again possible to kill w upper corner : see var]

(;B[ge];W[gj];B[fi];W[el];B[je];W[jk];B[ma]C[No, not usefull :
the stone is dead anyway, and you are filling YOUR territorry with your own stone : you lost 1 point.]
;W[cl];B[ed];W[bb];B[ig];W[gl];B[bf];W[bg];B[tt];W[tt];B[tt]
)
(;B[ab];W[bc];B[bb]))
(;W[ib];B[md];W[lc];B[hb];W[ja]))
(;B[ce])
(;B[bb]
(;W[ba];B[ab];W[bc];B[ca])
(;W[ce];B[bc])
(;W[bc];B[ca])))
(;W[ej]C[white missed this good variation];B[di];W[fj];B[el]
;W[dl]))
(;W[ce]C[white can kill];B[cf];W[de];B[ed];W[df]))
(;B[fb]))
