(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]
C[Big shimari AI joseki brain dump by Uberdude]
;B[qd]
;W[]
(;B[oc]C[strong AIs, like Go Seigen, seems to see small shimari as a bit slow and liable to overconcentration]
(;W[dd]
;B[pq]
;W[dp]
;B[]
;W[po]
;B[qo]
;W[qn]
;B[qp]
;W[pm]
;B[nq]C[e.g. in this side opening like AlphaGo vs Lee Sedol game 5]
;W[qe]
;B[pe]
;W[qf]
;B[rd]
;W[pf]
(;B[oe]
;W[pj]C[White can make a strong black corner a bit stronger and bigger in exchange for some nice outside sente exchanges.])
(;B[ql]C[Lee Sedol resisted]))
(;W[nd]C[often a nice reduction]))
(;B[nc]C[first, what not to do]
(;W[qe]C[this is usually bad]
;B[pd]C[black just extends and has a big corner with o17 well placed. If it was small shimari at p17 it's a common sequence and about even (can be soft for black, but also not giving white momentum so can have latent attack meaning), but this would be more efficient for black.]
;
;W[]
;B[dd]C[also consider tewari]
;W[]
;B[fc]C[common 4-4 enclosure]
;W[ce]
;B[cd]C[pretty terrible exchange (but actually bots do make this kosumi approach not so rarely).])
(;W[od]C[this is old sequence, AlphaGo used it vs Mi Yuting too]
;B[oc]
;W[pd]
;B[pc]
;W[qe]
;B[rd])
(;W[pd]C[This early attach AI popularised]
(;B[pc]C[most natural answer, connecting]
;W[qe]
(;B[od]
;W[pe]
;B[rd]
;W[qc]C[white puts in this cut to make some aji for later]
(;B[rc]C[white often uses this similar to attach on outside of small shimari, e.g.]
;W[dd]
;B[pp]
;W[dp]
;B[]
;W[qn]
;B[nq]LB[nc:5][dd:2][pd:8][qd:1][qn:6][dp:4][pp:3][nq:7]C[actual order numbered]
;W[oe]
;B[ne]
;W[nf]
;B[me]
;W[mf]
;B[le]
;W[lf]C[push 1 more or not?]
;B[ke]
;W[pj]C[white gives black a nice upper side, but in exchange built right side, without the forcing exchanges against corner black r12 would be a nice checking extension, now it's an invasion into white area.]
;B[og]C[this peep is an aim for black.])
(;B[qb]C[this would give s15 sente so bad]
;W[re]
;B[rc])
(;B[re]C[this seen in some pro games too]
;W[qg]
;B[rf]
;W[og]
;B[qi]
;W[rg]
;B[qf]
;W[pf]
;B[ph]
;W[pg]
;B[qb]))
(;B[qc]C[also possible but maybe a bit soft (white is lighter)]
;W[pj]C[say white tenuki]
;B[od]C[white won't answer this now]
;W[pe]
;B[pg])
(;B[pe]LB[oc:6][pc:4][qc:3][od:5][pd:1][pe:2][qe:7]C[if black cuts it reverts to here first and following order, see that var.]
;W[od]
;B[oc]
;W[qc]
;B[rd]))
(;B[qc]C[solid, trying to reduce white sente moves, but not connected]
(;W[pc]C[but if white cuts get heavy bad shape]
;B[pe])
(;W[pf]C[maybe white does this, or more often just tenuki and aim to use aji later.]))
(;B[qe]C[black denies white outside hane, but more scope in corner for shenanigans. white also might tenuki for now]
(;W[pc]
;B[qc])
(;W[qc]
;B[pc]
(;W[pb]
;B[oc]
;W[rc]C[there's a tripod group for later.])
(;W[oc]C[one way to use aji]
;B[pb]
;W[ob]
;B[od]
;W[pe]
;B[qb]
;W[qf]
;B[rc]
;W[pf]
;B[nd]C[white can still end up blocking the right side in sente, but at cost of black getting a bigger corner that before.]))
(;W[nd]))
(;B[pe]C[more resistance from black]
;W[qc]
(;B[pc]
;W[od]
;B[oc]
;W[qe]
;B[rd]
;W[pf]C[this is a common joseki now]
;B[oe]
;W[nd]
;B[qf]
;W[mc]
;B[mb]
(;W[lb]C[the basic idea]
(;B[lc]
;W[md]
;B[nb]
;W[kc]C[obviously this white plan is contingent on white having this ladder.]
(;B[rc]
;W[ld]C[white gives black big corner and closes top side])
(;B[qb]C[careful]
;W[rc]
;B[rb]C[if here]
;W[re]
;B[sc]
;W[of]C[oops]))
(;B[md]
;W[ne]
;B[lc]
(;W[of])
(;W[re]
(;B[rc]
;W[of]C[nice for w])
(;B[rf]
;W[se]
;B[of]
;W[rc]C[sometimes bots suggest this crazy sacrifice if black strong around as white isn't actually alive yet.]))))
(;W[ne]C[w might do this first to make sure no trade]
(;B[of]
;W[lb]
;B[lc]
;W[md]
;B[nb]
;W[kc]
;B[rc]
(;W[nf])
(;W[ld]))
(;B[re]C[If take here s17 isn't sente so black doesn't need to spend another move on r17]
;W[lb]
;B[lc]
;W[md]
;B[nb]
;W[kc]
;B[pp]
(;W[of]C[this remains as a big followup])
(;W[ld])
(;W[jf]C[to fix the ladder w may also do fancy shape]))))
(;B[od]
;W[pc]
(;B[qe]
;W[nb]C[not so common, white can live])
(;B[re]))))
(;W[nd]
(;B[od]
;W[mc]
(;B[md]
;W[ne]
(;B[lc]
(;W[mb]
;B[oc]
;W[ld]
;B[me]
;W[kc]
;B[le]
;W[lb]
;B[nf]
;W[ke]C[used when white building top left])
(;W[oc]
;B[mb]
;W[nb]
(;B[mc]
;W[pd]
;B[oe]
;W[pe]
;B[of]
;W[pc]
;B[pf]
;W[qe]
;B[qf])
(;B[pc]C[depends on ko threats])))
(;B[me]
;W[oc]
;B[nb]
;W[nf]
;B[ob]
;W[pc]
;B[pd]
(;W[mf]
(;B[lc])
(;B[ke]
(;W[kg]C[seen in some pro games])
(;W[jf]C[AI likes])
(;W[mb]
;B[pb]
(;W[jc]
;B[lf]C[centre fighting])
(;W[kd]C[check pro game pattern search]))))
(;W[ke]C[powerful to directly hit vital point])))
(;B[oc]C[solid, w tenukis and treats as nice forcing exchanges,]))
(;B[oc]C[kinda soft, like shoulder hit small shimari])
(;B[md]C[black doesn't want white to forcing moves on left]
;W[oc]
(;B[od]
;W[ne]
;B[pc]
;W[mc]
;B[ob]
;W[nb]
(;B[lc]C[ko])
(;B[oc]
;W[ld]C[ladder]))
(;B[ne]C[?]))))
(;B[nd]
(;W[lc]C[This is white's most common first move against big high shimari]
(;B[dp]C[black often tenukis]
;W[pd]C[and this is a vital point]
(;B[pc]
;W[oc]
;B[od]
;W[pe]
;B[qc]
;W[nc]
;B[md]
(;W[mc])
(;W[ld]))
(;B[pe]C[if black wants outside]
(;W[pc]
;B[qc]
;W[qb]
(;B[qf]C[solid]
;W[ob]C[connection to m17 is then but playable]
;B[nb]
;W[mb])
(;B[od]
;W[pb]
(;B[qf]
;W[mc]
;B[le]C[used if black building right side])
(;B[oc]C[it might actually be possible to capture white]
;W[qe]C[but using this cut white can make a sacrifice and get focing moves outside. random example continuation]
;B[re]
;W[qf]
;B[rb]
;W[rf]
;B[rd]
(;W[og]
;B[of]
;W[qi])
(;W[pf]
;B[oe]
;W[qj]C[if black played q15 because he was trying to build the right side then this trade is probably nice direction for white.]))))
(;W[qc]C[if black doesn't have ladder also this move]
;B[pc]
;W[od]
;B[oc]
;W[oe]
;B[qe]
;W[nc]
;B[nb]
;W[mc]
;B[of]
;W[ne]
;B[nf]
;W[me]
;B[qb]
;W[mf]C[for example])))
(;B[jc]C[if pincer]
(;W[le]C[can jump, depends on situation])
(;W[pd]C[here again]
;B[pc]
;W[oc]
;B[od]
;W[pe]
;B[qc]
;W[nc]
;B[md]
;W[ld]
;B[nf]C[this is a basic joseki, what happens next more complicated]
;W[mc]
;B[pf]C[e.g.]))
(;B[nb]C[black can defend if really wants territory, but soft, often white will be happy to have made that sente exchange])
(;B[oc]C[sometimes you see this answer which I don't really understand (it's about reducing white further aji in corner])
(;B[nc]C[if here then it's like you made lower shimari and then o16 is weird]
;W[qe]C[still some bullying potential for white]
;B[pd]LB[lc:1][nc:2][pd:4][qe:3]C[With 1-2 first, 3-4 is now acceptable for white.]))
(;W[pd]
;B[pc]
;W[qc]C[this can be an early probe]
;B[oc]C[later]
(;W[]
;B[]
;W[rd]
;B[qe]
;W[qb]C[tripod group])
(;W[pf]C[might be a useful sente]
;B[rd]
;W[pi])
(;W[qe]
;B[rd]
;W[pf]
(;B[rc])
(;B[qg]
;W[re]
;B[rc]
;W[pg])))
(;W[qe]C[don't generally want to do this]
;B[pd]LB[gb:2][nd:3][pd:1][qd:5][qe:4]C[4-5 bad])))