(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[0.00] PW[White]PB[Black] ;B[qd] ;W[dp] ;B[pq] ;W[dc] ;B[de] ;W[ce] ;B[cf] ;W[cd] ;B[fq] ;W[cn] ;B[dg] ;W[fc] ;B[ck] ;W[qo] ;B[qm] ;W[qi] ;B[po] ;W[qf] ;B[qn] ;W[oc] ;B[od] ;W[nd] ;B[pf] ;W[qg] ;B[pc] ;W[oe] ;B[pd] ;W[ob] ;B[ne] ;W[md] ;B[nf] ;W[og] ;B[of] ;W[jd] ;B[dr] ;W[cq] ;B[iq] ;W[kq]C[This was the invasion to be studied.] ;B[mq] ;W[mp] ;B[np] ;W[lp] ;B[no] (;W[qq]C[This move is absolute genius. Would you have spotted this move?] (;B[pr] ;W[ro] (;B[qr] ;W[rl] ;B[rn]C[white settles the group on the right in sente] ;W[mr] ;B[nq] ;W[ln]C[while settling the invasion group afterwards]) (;B[rn]C[if black seals off the right] ;W[qr] ;B[so]C[this leaves alot of Aji at o2, q4, r6, which makes it harder for black to attack white severely on the right. I thought this was the best way for black to play though. ])) (;B[qr]C[black can also hane instead of descend] ;W[pr] (;B[or] ;W[pp] ;B[ps] ;W[oq] ;B[pr] (;W[pn] ;B[oo] ;W[ql]C[But with this sequence, white has still settled his group on the right.]) (;W[oo] ;B[pn] ;W[ql]C[this is also an option])) (;B[qp]C[this was the real game sequence] ;W[oq] ;B[rq] ;W[mr] ;B[nq] ;W[ir] ;B[hr] ;W[jr] (;B[ep]LB[hq:A]C[necessary to protect cut at A] ;W[nr]C[and white connects on the bottom. Still, the group on the right needs to be taken care of, but considering how secure the bottom is, it is much more manageable for white now. ]) (;B[nr]C[If black ignores the cut and descends] ;W[hq] ;B[hp] ;W[gq] (;B[gr] ;W[gp] ;B[go] ;W[fp] ;B[ep] ;W[fo] ;B[fn] ;W[eo]C[The ladder doesn't work.]) (;B[gp] ;W[gr] ;B[fr] ;W[hs] (;B[fo] ;W[ep] ;B[fp] ;W[fm]C[black's whole group is now on the attack]) (;B[eo] ;W[ep] ;B[fp] ;W[em]C[same here]) (;B[fp] ;W[en]C[and here as well])))))) (;W[mr]C[Natural instinct would be go to here and to settle.] ;B[nq] ;W[ln] ;B[rj]C[but this leaves black to get s10 and the group on the right is not secure for white.]))