(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[7.00]
GN[Do4]PW[Cedric Holle]PB[David Ulbricht]WR[3d]BR[3d]RE[W+Resign]
;B[qc]
;W[dd]
;B[oq]
;W[dp]
;B[qn]
;W[fq]
;B[cc]
;W[cd]
;B[dc]
;W[fc]
;B[fb]
;W[gb]
;B[eb]C[(Avoiding the complicated variations after E17 instead)]
;W[gd]
;B[ed]
;W[ec]
;B[bd]
;W[be]
;B[bc]
;W[cf]
;B[ee]
;W[df]
(;B[gp]C[I didn't quite know how to continue locally top left (and I still remembered how bad the fight in game 3 had gone in the same corner, so I was a bit hesitant here) - my opponent showed my some variaitons after the game.

My move is still fine though.]
;W[gg]
;B[gq]
;W[fp]
;B[go]
;W[po]
;B[pn]
;W[oo]
;B[qo]
;W[pq]
;B[pp]
;W[op]
;B[qp]
;W[nq]
;B[or]
;W[mp]
;B[lq]
;W[nr]
;B[pr]
;W[jp]
;B[jr]C[I thought rather long at this point. There is a lot of continuations to consider locally.

My idea was to let white play M4 next and take sente to invade the left side.]
;W[nm]C[But my opponent did not play M4...]
;B[lp]C[... so I did.

However it is better to play L5, to force white to make a bad exchange he doesn't want to.
(In the game it came back to the same variation, so I got away with it)]
;W[lo]
;B[ko]
(;W[kp]C[This is the move - white shouldn't cut but instead just extend to M6. The leaves white K4 stronger and with a lot more annoying aji and doesn't give black M6 for free!]
;B[ln]
;W[mo]
;B[jo]LB[ln:C][jo:B][mo:D][kp:A]C[However this is basically and exchange A for B, while black also got C for D]
;W[dm]C[I was surprised my opponent didn't continue around J5 here.

]
(;B[cp]C[In the game I felt like protecting against a white follow-up around J5 would be a strong move and considered to play J5 myself.
In fact I was almost positve that I would come back and find lz suggest a move around there, I could almost picture it. (and I would be right)

But I was afraid of it being to slow and couldn't quite follow my instinct yet, so I tenukied.

Instead the strongest move according to lz is L7!!!

It removes a lot of aji on the bottom side, and it also gives strength to attack the weak O7-group next!, by playing a cap at O9! (since then both sides would be strong!]
;W[co]
;B[dq]C[probing moves]
;W[cq]
;B[nk]C[So now I did in fact cap this.
But without having strengthened my weakness on the left of this, the attack is premature!

Instead a better way would've been to attack from the side of my weakness, aka still L7! - or at least M8]
(;W[lm]C[But white then helped me fix my weakness anyway.
This was my hope

Instead white can now use J5 to full effect!
(see var)]
;B[km]
;W[ll]
;B[kl]
;W[lk]
;B[mn]
;W[nn]C[and O9 is still in a useful spot, hitting a shape point.]
(;B[dl]C[This one is a move I need to have a really deep look at.

It has some sort of plan, but the problem is, that it's not really threatening any severe follow up.
These kind of moves, especially attachments, are moves I need to be much more mindful of. I need to play them with more calculations in mind, not just assuming that any attachment warrants an automatic local response.
Very important concept!


Instead, there are two important points on the board:

1) extending at B4, adding liberties to the C4-stone and asking white how to respond now. White most likely should choose B5 or B3.
After that I can tenuki, now knowing if I can more indirect forcing moves on the left side or if I can take away the corner (later!)

2) SHAPE!
There is still a liberty-problem around the K5-stones.
So it is crucial to play at least L9 now.
In the game I didn't do it, because I was a bad exchange weakening O9, but that stone is already doing its (light!) job either way.]
;W[kk]
;B[em]
;W[bp]C[now all the corner aji is gone and I didn't gain that much outside profit.]
(;B[dn]C[The problem with D8 and E7 - This is just not a good follow-up, because I either lose sente or I just make the target that white can cut off bigger.

In game I was afraid of the E8-cut and thought I would have to protect it anyway, but if white cuts, I can just fight on the left side, also using the E15-aji in some variations.

So instead I should just play at the biggest area, which is the top right.
E.g. just O16.

Another option is to play L6, probing if white resonds N7 (to keep the liberties of the K5-group exploitably low) or O8, to hurt O9.
In the first case, I tenuki to the top left again, in the second I follow upt at Q9.]
;W[cm]
;B[cl]
;W[bm]
;B[fl]
;W[ek]
;B[el]C[So I destroyed the left a bit.
But I did so in gote, and that side was hard to take already before that due to D8/E7 and E15.

Now white can get the first move top right and pull ahead!]
;W[oc]
;B[od]C[(Better just Q15)]
;W[nd]
;B[pd]
;W[ne]
;B[nc]
;W[mc]
;B[nb]
;W[mb]
;B[of]C[P18 is just such a huge endgame move.

I knew it, but I tried to benefit on this side first.
The problem though is, that the right is still open from so many directions.]
;W[ob]C[So naturally white took the biggest move on the board.]
;B[fg]
;W[ff]
;B[ni]C[looking to take as much as I can]
;W[qh]C[But there is just so much darn aji left behind...]
;B[qj]
;W[pj]
;B[pk]
;W[og]
(;B[ng]C[Shape:

Underestimating a weakness left behind after white cuts at O14.

Instead I should break whites shape and escape out with the corner stones at O14 myself!!]
;W[nf]
;B[oh]
;W[oe]
;B[pf]
;W[pe]
;B[qe]
;W[qf]C[The move I missed for some reason - I only saw Q13, which ofc would be ok for black]
;B[pg]
;W[re]
;B[qd]
;W[qg]
;B[rd]
;W[rj]
;B[rf]C[Too scared about the corner - S9 or R9 was maybe my best way to fight back]
;W[rg]
;B[se]
;W[qk]
;B[ql]
;W[qi]
;B[pl]
;W[ph]
;B[og]
;W[oj]
;B[nj]
;W[mg]
;B[nl]
;W[mm]
;B[ki]C[The game is now very good for white.
I try some last idea to attack the L9-group


The timing on some of the next moves is probably a bit off, but the general way this game ended remains the same.]
;W[io]
;B[im]
;W[in]
;B[jn]
;W[hm]
;B[il]
;W[iq]
;B[ir]
;W[hl]
;B[jk]
;W[jj]
;B[ij]
;W[ji]
;B[kj]
;W[jh]
;B[kh]
;W[kg]
;B[mh]
;W[gn]
;B[mr]
;W[hk]
;B[ik]
;W[hj]
;B[ii]
;W[gi]
;B[jg]
;W[ih]
;B[hh]
;W[ig]
;B[hg]
;W[if]
;B[hi]
;W[gh]
;B[hf]
;W[he]
;B[ie]
;W[jf]
;B[gf]
;W[ef]
;B[gj]
;W[fh]
;B[eh]
;W[eg]
;B[fi]
;W[fg]
;B[ge]
;W[hd]C[Just no way - I resign])
(;B[nf]
;W[pf]
;B[oe]
;W[oj]
;B[qi]C[And I have to accept the fact that I can't keep it all!!

Here I can still go for mutual destruction and it is a game!]))
(;B[kn]
(;W[mm]
;B[nd])
(;W[nl]
;B[pk])))
(;B[kk]
;W[lj]C[Next I can either continue locally or tenuki.
E.g. K11 or Q14]
(;B[ji]
;W[qf])
(;B[pf])))
(;W[io]
;B[ip]
;W[km]C[possible option]
;B[kn]
;W[lm]
;B[in]
;W[mn]
;B[ho]
;W[lr]
;B[kq]C[And now O9 looks awefully silly, white can even just play away]
;W[pd]))
(;B[km]
;W[nk]
(;B[nd]C[(or N16)])
(;B[lk]C[or this, giving me even more in the middle to invade the left strongly])))
(;W[ln]
;B[jo]
;W[jm]C[Next white can get a lot more outside with J5!]
;B[cm]
;W[io]
;B[in]
;W[jn]
;B[ip]))
(;B[ef]
(;W[eg]
(;B[fg]C[Looking for a big squeeze!]
;W[ff]
;B[eh]
;W[dg]
(;B[gf]
;W[fe]
;B[ge]
;W[fd]
;B[hd]
;W[de]
;B[gg]C[Getting nice influence.])
(;B[gg]))
(;B[ge]C[Alternative option, looking to continue the fight!]))
(;W[dh]C[White can also avoid the squeeze this way]
;B[eh]
;W[di]
;B[ei]
;W[dj]
;B[hg]C[possible continuation])))
