Continuing some game analysis from
another thread since that was starting to look like a study journal to me. Here is a recent game.
(;FF[4]GM[1]SZ[19]AP[SGFC:1.16]
GN[Rank]
PB[Black]
BR[6K]
PW[me]
WR[6K]
KM[6.5]
PC[Tygem Baduk]
RE[Draw]
C[I am white.];B[dp];W[pd];B[dd];W[pp];B[pf];W[nd];B[qd];W[qc]
;B[rd]LB[qe:A]C[The usual move is to draw back at A (R15).]
;W[rc];B[pe];W[od];B[qj];W[kc]LB[lc:A]C[I don't know the right spot for this shape, but wanted to prevent black's good move at A (M17).]
;B[gc];W[qm]LB[ql:A][qh:B]C[Should I extend as far as A (R8) to aim at the invasion at B (R12)? Black does not defend this one.]
;B[nq];W[pq];B[jq];W[cn];B[co];W[dn];B[fq];W[cj];B[bn];W[bm]
;B[bo];W[cc];B[cd];W[dc];B[ec];W[eb];B[fc];W[bd];B[be];W[bc]
;B[cf];W[fb];B[gb];W[lq]SQ[nq]LB[qh:A]C[This could be small. After Q3, black has the option of treating the marked stone at O3 lightly. Looking at the board now, I would prefer A (R12).]
;B[nn]
(;W[lo]C[I considered cutting directly, but didn't see a good picture. Still, maybe not a great idea to move this stone.]
;B[po];W[qo];B[pn];W[qn];B[mq];W[kq];B[jp];W[no]SQ[nn][pn][po]
C[I think I played this to ruin the bamboo joint, but maybe it doesn't work here.]
;B[oo];W[np];B[op];W[oq];B[mo]LB[no:A]C[I did not expect this move.]
;W[ko];B[ld];W[lc];B[md];W[mc];B[nf];W[pm]C[Not sure of the timing of this forcing move. Maybe I can save it.]
;B[mp];W[jo];B[ok];W[hp];B[hq];W[gp];B[gq];W[kd]C[I'm having trouble with the line starting here. Maybe the L16 itself is a mistake.]
;B[ke];W[je];B[kf];W[jf];B[kg]
(;W[ji]C[Maybe too thin. I didn't want to push from behind once more, though. This move could be a huge mistake.]
;B[jg];W[id];B[ki];W[kj];B[jj];W[li];B[kh];W[lk];B[jk];W[lm]
;B[gk]SQ[ji][cj][dn][gp][hp]C[It is hard for me to judge the result. The marked stone has been sacrificed and white has stuck his head into black's right side territory. However, white's marked stones do not see to be useful now.]
;W[gm];B[ek];W[dl];B[hm];W[hn];B[im];W[in];B[fm];W[gn];B[em]
;W[ch];B[dk];W[ck];B[mj];W[lj];B[ml];W[ll];B[mk];W[rk];B[rj]
;W[qk];B[mh];W[pk];B[pj];W[sj];B[si];W[sk];B[rh];W[eh];B[gh]
;W[ig];B[ih];W[hg];B[hh];W[jr];B[ir];W[mr];B[nr];W[ls];B[kr]
;W[js];B[is];W[ks];B[ff];W[ip];B[iq];W[or];B[os];W[ps];B[ns]
(;W[qr]C[Chicken?];B[di];W[ci];B[dh];W[dg];B[cg];W[dj];B[ei]
;W[ej];B[fi];W[gl];B[fk];W[fj];B[gj];W[jl];B[hk];W[jm];B[ik]
;W[sd];B[se];W[sc];B[re];W[of];B[og];W[oe];B[mf];W[ep];B[eq]
;W[do];B[cq];W[fp];B[am];W[bl];B[bh];W[bi];B[ag];W[ib];B[fa]
;W[db];B[he];W[ie];B[hf];W[if];B[gg];W[hd]C[At this point black offered a draw. I accepted.]
)
(;W[ib]C[If white plays elsewhere...]
(;B[qr]C[This doesn't seem to be a threat.];W[pr];B[qp];W[qq]
;B[rq];W[rp];B[qs];W[qp])
(;B[qp]C[And this cut isn't a problem, either.];W[qq];B[rq]
;W[rp];B[qr];W[pr];B[qs];W[qp])))
(;W[ih]SQ[be][cf][cd][dd][ec][fc][gc][gb]C[Normal getting ahead move, but with black's thickness, seems thin, too.]
;B[jd];W[id];B[ig];W[jg];B[jh];W[hf];B[if];W[ie];B[hg];W[gg]
;B[hh];W[ii];B[he];W[gf];B[hd];W[ic];B[hi];W[ij];B[fh]C[I don't know.]
)
(;W[jg];B[kh];W[ii];B[jj]C[This result may be better than the game.]
))
(;W[np]C[This is the first thing to check, but..];B[mp]
(;W[mq];B[op];W[no];B[oo];W[mo];B[oq]SQ[pp][pq]C[The corner is damaged and white is still not settled on the other side.]
)
(;W[no]C[The result this way may be better.];B[mo];W[mq];B[op]
;W[oo];B[po];W[oq];B[on];W[op];B[qn]))
(;W[no]C[This may be promising...]
(;B[mo];W[mp]C[Usually the shape is to counter-hane, but...]
;B[oo];W[np];B[op];W[oq];B[lp];W[mq]C[Well, actually this is not bad for white, I think.]
)
(;B[oo]C[How to handle this move?]
(;W[np];B[op];W[oq];B[mp]C[The ladder is good for black.])
(;W[on];B[pn];W[om];B[po]C[I don't like this fight for white.]
))))
In particular, I have a lot of doubts about what to do in the following positions:

Move 41, how should white play?
- Click Here To Show Diagram Code
[go]$$B Move 41, how should white play?
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . O O X . . . . . . . . . . . . |
$$ | . O O O X X X . . . O . . . . . O O . |
$$ | . O X X . . . . . , . . . O O O X X . |
$$ | . X . . . . . . . . . . . . . X . . . |
$$ | . . X . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O , . . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . O . . . . . . . . . . . . . . O . . |
$$ | . X O O . . . . . . . . . 1 . . . . . |
$$ | . X X . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . , . . . . . O . . . |
$$ | . . . . . X . . . X . O . X . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Moves 75, how to get ahead (or whether to?)
- Click Here To Show Diagram Code
[go]$$B Moves 75, how to get ahead (or whether to?)
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . O O X . . . . . . . . . . . . |
$$ | . O O O X X X . . . O O O . . . O O . |
$$ | . O X X . . . . . , O X X O O O X X . |
$$ | . X . . . . . . . O X . . . . X . . . |
$$ | . . X . . . . . . O X . . X . X . . . |
$$ | . . . . . . . . . . 1 . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O , . . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . O . . . . . . . . . . . . . O O . . |
$$ | . X O O . . . . . . . . . X . X O . . |
$$ | . X X . . . . . . O O O X . X X O . . |
$$ | . . . X . . O O . X . . X . X O . . . |
$$ | . . . . . X X X . X O O X X O O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Of course, any feedback is appreciated.