(;GM[1]FF[4]SZ[19]AP[SmartGo:3.1.4]CA[UTF-8]
GN[Akiyama_Redmond_annotated]
PW[Akiyama Jiro]WR[9p]
PB[Michael Redmond]BR[9p]
DT[2018-03-26]
PC[The KGS Go Server at http://www.gokgs.com/]
KM[6.5]
RE[B+4.50]
RU[Japanese]ST[2]ZT[60]
C[In this game I have Black against Akiyama Jiro 9P, and we play in the A section elimination of the Kiriyama Cup. ]
;B[qd];W[dp];B[dc];W[pp];B[cn];W[fq];B[gp];W[gq];B[ch];W[nc]
(;B[md]
C[I might say I was inspired by AlphaGo to play this shoulder hit, but actually it was probably not a good move. I have added two variations to show how I could have chosen a normal joseki to get a reasonable position. ]
;W[nd]LB[md:A][gp:B]
C[I had been thinking of playing the shoulder hit at A for about two weeks before I tried it out in this game, and I had decided that this board position is the most likely for it to succeed, with Black's stone at B working as a ladder breaking move in some of the variations I studied. So, while I was actually about ready to discard my idea of playing the move at A, I could not resist the temptation to experiment with it in this game. ]
;B[me]
(;W[ne]
C[While pushing here might seem to be a natural move, I think it is better for White to play a keima to the right (see var). ]
;B[pg]LB[ne:A][pg:B]
C[When White pushes at A and Black extends towards the side with B, my plan to take positions on both the right and upper sides is working, and this should be at least a good result, if not already good for Black. ]
(;W[mf]LB[pg:A][pc:B]
C[After Black's wide extension at A, Black will have an efficient shape on the right if I get to play at B. White's next move in the corner is an attachment at the 3-3 point, but I have a plan for that too (see var). ]
;B[kc]TR[nc:ne][mf]
C[Black refuses to give space to the marked group. ]
(;W[jd]
C[White also tries a shoulder hit, but the variation shows what I suggest as White's best move. ]
;B[kd];W[fc]
(;B[lf]
C[This hane was vulgar, and I should have played a hane on the left (see var). ]
;W[mg];B[lg];W[mh];B[lh];W[mi];B[qj]
C[Black's extension is a big move that forestalls White A. ]LB[qi:A];W[li]
C[White has a strong position in the center. ];B[hd];W[gd];B[hc];W[dd];B[cd]
;W[cc]TR[hc][gd]
C[The marked exchange has set up this crosscut for White, and will play an important role in the game variation. ]
(;B[bc]
C[Black's atari from this side is the strongest move, which sometimes works when Black has a stone at A. Black could also have played atari from the other side, which is more peaceful and gives an even result (see var). ]
LB[ch:A];W[cb];B[ed];W[de];B[ec]
(;W[bb]
C[Curling in the corner was a strong move, but White should have simply played at A (see var). ]
LB[ee:A]
(;B[ce]
C[Crawling here is correct, while connecting on the second line would have given White a squeeze (see var). ]
;W[ee]
(;B[fe]
C[Black's hane was the strongest move, but I should have been happy to play at A (see var). ]
LB[fb:A]
(;W[df]
C[I actually overlooked this move, expecting White to jump (see var). ]
(;B[dg]LB[dg:A]
C[Playing at A I get to force White into an ugly shape and play a ladder breaking move, but I will lose the local fight. The alternative was to crawl on the third line, but that would have been bad for Black (see var). ]
;W[cf];B[bf];W[ef];B[cg];W[bg];B[be];W[fd]
C[The ladder at A favors White. ]LB[ff:A]
(;B[pq]
C[Black 53 is not exactly a ladder breaking move, but when Black gets to play two consecutive moves in the corner, this is more effective than the attachment at A (see var). ]
LB[op:A]
(;W[eg];B[eh];W[eb];B[qp]
(;W[qf]
C[White scoops out the righy side, a big move. However, I would have continued in the LR corner (see var). ]
;B[pf];W[qe];B[pe];W[rd];B[pc];W[qc];B[pd];W[rb];B[qb];W[rc];B[rg]
(;W[pb]
C[White was alive in the corner, but it is important for White to add a stone by cutting here. If White plays away, he will get squeezed on both sides (see var). ]
;B[ob];W[qa]
(;B[cp]LB[qf:A]
C[I attach in the corner, a favorite move for AlphaGo. This was a bad choice in the game position, because the right side is more important. By invading at A to scoop out the right side, White has weakened the marked Black group, and I should have continued in the LR corner to deal with that (see var). ]
TR[pg][rg][qj];W[cq];B[dq];W[co];B[bp];W[do];B[bo];W[dr];B[dn]
(;W[qo]
C[My idea with the sequence from A was to build on the left side, but White still has a way to exploit the aji at B (see var), and the left was not as important as the right side. ]
LB[cp:A][bh:B];B[op];W[po];B[qq];W[qk];B[pk];W[pj]
C[White plays strongly to attack Black's group on the right. ];B[ql];W[rk]
;B[qi];W[rl]
(;B[ok]
C[The easy move with Black A is to simply clasp the White stone, but that leads to an unsatisfactory result (see var).  ]
LB[ok:A]
(;W[oi]
C[Naturally White saves the cutting stone, and this is already a difficult fight for Black. ]
;B[qm];W[rm];B[oh];W[pi];B[qg];W[ri];B[qh];W[oo];B[oc];W[nb];B[oa];W[nh]
;B[re]LB[re:A][rj:B][pa:C]
C[Even after playing at A, Black is not completely alive. White can play at B, and after Black C there will be a ko in the corner. ]
(;W[np];B[oq];W[ll];B[no];W[nn];B[mo];W[mn];B[lo];W[ln];B[ko]
(;W[lb]
C[Instead of immediately starting a ko in the corner (see var), White A threatens to set up an attack on Black's group on the upper side]
LB[lb:A];B[fg];W[db];B[fi]LB[fi:A][bh:B][rj:C]
C[By connecting at A, Black makes a strong shape in the center that helps the Black group on the upper side, and also reduces the number of ko threats for White with the crawl at B, so after this move it will be difficult for White to make the attack at C (which leads to a ko) successfully. ]
;W[jc];B[je];W[ie];B[he];W[if];B[jb];W[jf];B[ke];W[id];B[kb];W[hf];B[ki]
LB[ki:A]
C[I play a strong move at A, and the fight in the center gains momentum..]
;W[kh];B[ji];W[kf];B[nj];W[ni];B[kg];W[jh];B[ge]
(;W[le]LB[ii:A][ff:B]
C[White squeezes in preparation for a hane at A. Pushing through at B instead leads to a trade (see var). ]
;B[ld];W[jg];B[gg];W[le];B[pa]LB[pa:A][sa:B]
C[I sacrificed four stones to add a stone at A, and my loss in the center is just a few points. White can still try to live with a ko at B, but the game is very close now. ]
;W[jq];B[kk]
(;W[kn];B[ip];W[iq];B[eo];W[eq];B[mj];W[jk]LB[jk:A]
C[White A hits the vital point in Black's shape, and with this move White will be able to cut off the marked stones. ]
TR[mj:nj][ok:pk];B[kj];W[ii];B[ij]
(;W[jj]
C[White's cut at A was the losing move. White should have pushed through at B (see var)]
LB[jj:A][lj:B];B[jl]
(;W[lj];B[lk];W[mk];B[ik];W[ml];B[lq]TR[jj:jk]
C[Black already has a lot of territory in the center after capturing the marked two stones, and now Black is winning. The ko at A did play an important part in the rest of the game, so viewers who enjoy an endgame with ko should follow through to the end. ]
;W[lr];B[kr];W[kq];B[mr];W[lp];B[mq];W[jo];B[hn];W[sa];B[qb];W[hi];B[hj]
;W[pb];B[rj]
(;W[mp];B[ro];W[rn];B[rp];W[im];B[hm];W[fp];B[fo];W[hp];B[go];W[bh];B[ci]
;W[bi];B[bj];W[cj];B[bk];W[ac];B[ai]
(;W[bq];B[qb];W[bn];B[bm];W[pb];B[og];W[nf];B[qb];W[di];B[dh];W[pb];B[qn]
;W[pl];B[qb];W[gi];B[gj];W[pb];B[pm];W[om];B[qb];W[se];B[sf];W[pb];B[sd]
;W[sc];B[qb];W[ic];B[ib];W[pb];B[ol];W[kp];B[qb];W[gb];B[hb];W[pb];B[nm]
;W[on];B[qb];W[nq];B[nr];W[pb];B[sk];W[pn];B[qb];W[ei];B[fh];W[pb];B[pl]
;W[nk];B[qb];W[gf];B[ff];W[pb];B[sn];W[oj];B[qb];W[bd];B[ah];W[pb];B[ed]
;W[ec];B[qb];W[ae];B[ag];W[pb];B[aq];W[qb];B[br];W[jr];B[cr];W[ks];B[dq]
;W[cq];B[hg];W[ih];B[jm];W[io];B[ho];W[hq];B[in];W[ha];B[lf];W[lg];B[sm]
;W[nl];B[sl];W[or];B[pr];W[ms];B[os];W[cs];B[bs];W[ds];B[km];W[lm];B[ia]
;W[ga];B[ka];W[se];B[ns];W[ls];B[bq];W[dq];B[af];W[ad];B[le];W[sd])
(;W[gb];B[hb];W[qb];B[qn];W[pl];B[on];W[kp];B[om];W[ol];B[nl];W[nk];B[pm]
;W[oj];B[sk];W[nm];B[sn];W[ol];B[br]))
(;W[bh];B[ci];W[bi];B[bj];W[cj];B[bk];W[im];B[hm];W[ac];B[ai];W[rp];B[rq]
))
(;W[ik];B[il];W[hk];B[kl];W[hj];B[om]))
(;W[lj];B[lk];W[mk];B[hi];W[ih];B[kl]LB[mk:A];W[ml];B[jm]
C[When White cuts at A, Black must protect on the left due to lack of liberties. White takes the right side territory, and Black will get some territory in the center. This will be close, and much still depends on the ko at B. ]
LB[mk:A][sa:B]))
(;W[lk];B[ip];W[iq];B[eo];W[eq];B[jm];W[ii];B[ij];W[hi];B[hj]))
(;W[ff];B[gf];W[gg];B[hg];W[fh];B[gh];W[fg];B[jg];W[bh];B[ci];W[bi];B[cj]
;W[bj];B[bk];W[ck];B[bl];W[ad];B[hh]
C[White can sacrifice the center to take profit on the left side, but this is bad for White. White does not have enough ko threats for the ko at A, and Black has a lead in territory. ]
LB[rj:A]))
(;W[rj];B[pa];W[sa];B[qb];W[bh];B[ci];W[pb];B[lb]
C[White could have connected at A to start a ko in the UR corner, and this is clearly a ko that Black cannot afford to lose. There are three reasons why White hesitated to do this, one being that White stands to lose about 20 points in the corner when Black wins the ko, and secondly, the ko threat that Black can play at B is annoying because Black gains a few points by playing it, and finally, maybe White thought he could win without playing this ko. That said, this variation was the best way for White to play, because White has a lot of valid ko threats starting with C, and Black is in trouble. ]
LB[rj:A][lb:B][bi:C]))
(;W[rj];B[pa];W[sa];B[qb]))
(;W[pl];B[ol];W[pm];B[oi];W[oh]
(;B[og];W[ng];B[qg];W[qr])
(;B[qg])))
(;B[oj];W[pl];B[ok];W[oh]LB[oj:A][oh:B]
C[When Black takes the one stone by playing at A, White's peep at B becomes very annoying, as Black does not have eyeshape yet. ]
))
(;W[bh];B[ci];W[bi];B[bj];W[cj];B[bk];W[di];B[dh];W[fh];B[ei];W[fi];B[ej]
;W[fj];B[ek];W[qo]LB[bh:A][qo:B]
C[Since the left side looks like it's going to be Black's territory anyway, White could have crawled at A and played some forcing moves from the center before covering at B. ]
))
(;B[op];W[po];B[qo];W[pn];B[nq];W[qn];B[ql]
C[Black simplifies the position on the right by playing at A and controlling the local fight. After settling the Black group by playing at Black has a lead in territory, and a small advantage in the overall position. ]
LB[op:A][ql:B]))
(;W[qo];B[op];W[po];B[qq];W[ql];B[pb];W[rf];B[sf];W[se];B[sg];W[qg];B[qh]
;W[re];B[ri];W[ra];B[oh]TR[mh:mi][li]
C[If White plays away at A, and Black gets to connect at B, White can still live in the corner with this sequence. While this would be the correct answer for a life and death problem, it is a terrible sequence for White in this game position. Black connects at C, threatening D next, and the marked White group is weak. Black has a strong living group on the right, and will be able to win by attacking White in the center and building territory on the left side. ]
LB[qo:A][pb:B][oh:C][nf:D]))
(;W[oq];B[po];W[op];B[qq];W[oo];B[pn];W[on];B[pm];W[hp]
C[Black has an advantage in territory, and White has a moyo and some potential aji with a crawl at A. The game is even. ]
LB[bh:A]))
(;W[op]
(;B[np];W[eg];B[eh];W[eb];B[oq];W[qq];B[mq];W[nr];B[nq];W[qp];B[qm])
(;B[oq];W[np];B[nq];W[mp];B[mq];W[lp];B[qp];W[qo];B[rp];W[lq];B[fg];W[eb]
;B[eg];W[db];B[en])))
(;B[op];W[eg];B[eh];W[eb];B[po];W[qp];B[qo];W[oq];B[nq];W[pr];B[or];W[pq]
;B[np]
C[THis variation is weak in territory for Black, and while I am getting an outside wall, I does not work too well when White plays A next to settle the White group. This is close to an even game, but I did not like it for Black. ]
LB[qc:A]))
(;B[cf];W[dg]
(;B[fd];W[cg];B[bg];W[bh];B[bf];W[ci];B[bd];W[ff];B[ge];W[co];B[dn];W[dh]
LB[cf:A][dg:B][ac:C]
C[If Black crawls at A, White will extend at B and sac the corner. Later White can play at C to squeeze, and Black will end up adding three more stones inside the Black corner territory. This is good for White. ]
)
(;B[ge];W[cg];B[bg];W[bh];B[bf];W[ci];B[bd];W[eb];B[fd];W[db];B[ab];W[ac]
;B[fb];W[fa];B[gb];W[aa];B[ae];W[ag])))
(;W[dg];B[ge];W[cg];B[bg];W[bf];B[cf]
(;W[df];B[be];W[bh];B[af];W[ci];B[ab]LB[dg:A][ge:B]
C[If White jumps at A, Black will play at B and White has no way to capture Black on the left. In this variation Black captures the corner efficiently, and this is good for Black. ]
)
(;W[bh];B[df];W[eg];B[ef];W[cj];B[bp];W[cq];B[cl])))
(;B[fb];W[fd];B[eb];W[bd];B[be];W[ac];B[eg]LB[fb:A][eg:B]
C[If Black simply plays at A, then White will have no strong move on the left. White can live in the corner, but Black has a superior position after B. ]
))
(;B[bd];W[ee];B[fb];W[fd];B[eb];W[bf];B[ab];W[ce];B[db];W[ba];B[da];W[cj]
LB[bd:A][gb:B][ca:C][he:D]
C[If Black connects at A, White can squeeze with this sequence. When White later plays at B, Black will be forced to answer at C, so White D then becomes a strong move. This variation is good for White. ]
))
(;W[ee];B[bb];W[ce];B[bd];W[fd];B[db];W[eb];B[ca]LB[he:A][gf:B]
C[White squeezes Black in the corner and will continue with A or B to make shape for the weak group. This is still an even game. ]
))
(;B[cb];W[bc];B[ed];W[de];B[ec];W[ee];B[fe];W[bb];B[ge];W[cf]LB[cb:A]
C[If Black starts with the atari at A, the rest of this sequence is fairly straighforward. White settles the group while Black gets territory on the upper side, and the game is about even. ]
))
(;B[je];W[cc];B[cd];W[dd];B[cb];W[bc];B[ed];W[de];B[ec];W[cf];B[bb];W[bd]
;B[pc];W[pe];B[qe];W[pf];B[qg];W[og];B[oh];W[ng];B[ee]LB[je:A][cc:B][pc:C]
C[Black A was the shape move, and was better than the game variation. White can make sabaki with the attachment at B. Black then takes profit while attacking with C, and can surround the upper side. Black has a small advantage. ]
))
(;W[lf];B[hd];W[qi];B[pc];W[oh]LB[lf:A][qi:B]
C[Extending at A is the shape move. After Black surrounds the upper side, White B is an important point. While Black has a moyo in the upper left, White also has a good position on the right, and this is about even. ]
))
(;W[qc];B[pc];W[pd];B[pe];W[od];B[rc];W[qb];B[re];W[rb];B[sb];W[pb];B[mc]
C[White has a crunched-up bad shape, so I doubt that this variation would actually happen in a pro game. I made this var to demonstrate how White's attachment at A is not as effective when White has the two marked stones, and Black has potential to force White into this overconcentrated shape. ]
TR[nd:ne]LB[qc:A]))
(;W[pe];B[qe];W[pg];B[mc];W[qf];B[pc];W[ne];B[mg];W[fc]
C[When White presses at A, Black gets slightly cramped in the corner. This variation is close to even, but I think it gives White a slight advantage, so that is my reason for not recommending Black's shoulder hit at B as a good move. ]
LB[pe:A][md:B]))
(;B[pc];W[jd];B[hc];W[ne];B[md];W[nd];B[qg]
C[This is an even result. ])
(;B[lc];W[qc];B[pc];W[pd];B[qb];W[rc];B[od];W[pe];B[oc];W[rb];B[of];W[oe]
;B[ne];W[qe];B[nd]
C[This is another popular joseki that works well for Black in this game position. White will probably enter the upper side at A next, and the game is even. ]
LB[fc:A]))

