(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[5.50]
PW[Hanawa Yasutoki]PB[Nakayama Noriyuki]WR[4p]BR[4p]DT[1977-12-07]PC[Nihon Ki-in]RE[B+Resign]
;B[pd]
;W[dp]
;B[cd]
;W[qp]
;B[oq]
;W[ec]
;B[gc]
;W[mq]
;B[ed]
;W[op]
;B[pp]
;W[dd]
;B[dc]
;W[pq]
;B[po]
;W[de]
;B[cc]
;W[qq]
;B[np]C[The ladder is good for black!]
(;W[fd]C[This ladder is not good for white. Black can go out]
;B[ee]C[And black does so]
(;W[oo]
;B[on]C[The ladder is good for black! If the ladder would not be good for black, then black should not play this. It becomes a bad move, and white will not copy bad moves.]
(;W[ef]
;B[fe]
;W[no]
;B[mo]
;W[ge]
;B[ff]
;W[nn]
;B[nm]
;W[fg]
;B[gf]
;W[mn]
;B[ln]
;W[hf]
;B[gg]
;W[mm]
;B[ml]C[Black has two reasons for playing the ladder
1) The ladder actually works for him, so they are good moves
2) When white keep copying his moves he will die at tengen. The mirror shatters!]
;W[gh]
;B[hg]
;W[lm]
;B[km]
;W[ig]
;B[hh]
;W[ll]
;B[lk]
;W[hi]
;B[ih]
(;W[ii]C[White can not continue anymore. And diverts. This breaks the ladder in the lower right.]
;B[jh]
;W[kl]
(;B[jl]C[Even though the ladder does not work, black is looking forward to some ataris!
There is a saying that each move you play in a ladder that does not work costs you 7 points]
;W[kk]
;B[kj]
;W[jk]
;B[ik]
;W[jj]
;B[ji]C[Black played 4 moves in the ladder that did not work. According to the proverb this would be a 4 * 7 = 28 points loss]
;W[ij]
;B[gi]C[However, blacks gains forcing moves here and builds the left side as compensation for the ladder loss.]
;W[hj]
;B[gj]
;W[hk]
;B[gk]
;W[il]
;B[hl]
;W[jm]
;B[cn]C[Black sets out a vast area on the left. Black hopes this area makes up for his 28 point loss in the ladder]
;W[cl]C[But white resists!]
;B[en]
;W[ci]
;B[bh]C[What an attack!]
;W[ch]
;B[bi]
;W[cj]
;B[cg]
;W[dg]
(;B[eh]C[This is a creative defence]
;W[cf]
;B[bg]
(;W[dh]C[White defends here]
;B[bf]C[And black is forced to come back]
;W[fl]C[White needs to escape. This is also seperates blacks groups]
;B[gl]
;W[fm]
;B[ei]LB[dk:A]C[Black connects one of his weak groups, but is also happy to remove some eyeshape of the white group. He is also looking forwards to play the severe peep at A.]
;W[co]
;B[cm]
;W[dl]LB[dk:A]C[White gets to defend against the previous mentioned weak point at A]
;B[bo]
;W[bp]
;B[ep]
;W[eq]
;B[fp]
;W[fn]LB[dq:A]C[This looks like a thank you move. Black is happy to play the atari, but white still had a weakness at A which he needed to fix.]
;B[do]
;W[cp]
;B[er]C[Tesuji! It is surprising how often this move can come up in your games.. The idea is..]
(;W[dq]
(;B[go]LB[fr:A]C[This move prepares to retreat at A.]
;W[hm]C[White connects, black can not cut]
;B[fr]
;W[fo]
;B[eo]
;W[hr]LB[ho:B][io:D][gp:C][hp:A]C[White still aims at killing black, if black lives here he is satisfied, white does not have many points.
This is difficult though, A to D are all sente for black. They threaten to cut white.]
;B[hq]C[That is why black is not afraid to fight here.]
;W[iq]
;B[ir]LB[ho:C][gp:B][hp:A]C[Black can afford this crosscut, with moves A, B and C being sente. At this moment black does however not know yet which of these moves he prefers. The coming fight will show that.]
;W[gq]
;B[hp]LB[gm:A]C[The cut at A becomes serious]
;W[fq]
;B[gp]
(;W[jr]
;B[gm]
;W[gn]
;B[hn]
;W[im]
;B[gr]
;W[is]
;B[dr]
;W[io]
;B[ho]
;W[ao]
;B[bn]
;W[cr]
;B[br]
;W[bs]
;B[an]C[This is where the game ends. This moves makes miai]
(;W[ar]C[When white lives in the corner]
;B[al]SQ[cj][dl][fl]C[Black can connect underneath and capture the marked white stones])
(;W[bl]
;B[bq]C[Black kills.]))
(;W[gr]C[White can not block from this side]
;B[gm]
;W[gn]
;B[hn]
;W[im]
;B[jq]
;W[in]
;B[io]C[Black can play this ko, and is sure to live.]
;W[ho]))
(;B[fq]C[Black coul block, but it would be too simple, black found something better]))
(;W[fq]
;B[gq]
;W[fr]
(;B[gr]
;W[dr]SQ[gq][gr]C[Often the idea of this tesuji is to get these marked stones in sente. Black would now like to cut of the big center group. This is not possible though]
(;B[go]C[This does not work]
;W[fo]
;B[eo]
;W[hm]C[White can connect]
(;B[gm]
;W[gn]
;B[hn]
;W[ho]
;B[im]
;W[gp])
(;B[io]
;W[hn]
;B[jq]C[Black can make life on the lower side. This is enough for black]))
(;B[ho]
;W[hn]
;B[go]
;W[hm]
;B[kq])
(;B[hn]C[Black can also not block like this]
;W[gp]
;B[go]
;W[fo]
;B[eo]
;W[hp]))
(;B[dq]C[You might also want to look at this cut. It's complicated.])))
(;W[bf]C[White can not go for the kill]
;B[dh]
;W[bj]
;B[eg]
;W[df]
;B[be]C[Black wins the capturing race]))
(;B[cf]C[Instead of the notmal move here black found a better way of defending])
(;B[fl]C[First of all black can not play tenuki.]
;W[cf]
;B[bg]
;W[bf]C[Black would be captured]))
(;B[kk]C[This would continue the mirror go, but black had enough of it! It's not a good move, white played this move to break the ladder, but for black there is no ladder to break.]))
(;W[kl]
;B[jl]
;W[jh]
;B[ii]
;W[kk]
;B[kj]
;W[ij]
;B[ji]
;W[jk]
;B[ik]C[White can not continue like this]
;W[ki]
;B[jj]C[Tengen for the win!]))
(;W[no]LB[on:1][no:2]
;B[fe]LB[ef:A][on:B]))
(;W[ef]
;B[fe]
;W[ge]
;B[ff]
;W[fg]
;B[gf]
;W[hf]
;B[gg]
;W[gh]
;B[hg]
;W[ig]
;B[hh]
;W[hi]
;B[ih]
;W[jh]
;B[ii]
;W[ij]
;B[ji]
;W[ki]
;B[jj]
;W[jk]
;B[kj]
;W[lj]
;B[kk]
;W[kl]
;B[lk]
;W[mk]
;B[ll]
;W[lm]
;B[ml]
;W[nl]
;B[mm]
;W[mn]
;B[nm]
;W[om]
;B[nn]
;W[no]
;B[on]
;W[pn]
;B[oo]))
(;W[oo]
;B[on]
;W[no]
;B[mo]
;W[nn]
;B[nm]
;W[mn]
;B[ln]
;W[mm]
;B[ml]
;W[lm]
;B[km]
;W[ll]
;B[lk]
;W[kl]
;B[jl]
;W[kk]
;B[kj]
;W[jk]
;B[ik]
;W[jj]
;B[ji]
;W[ij]
;B[hj]
;W[ii]
;B[ih]
;W[hi]
;B[gi]
;W[hh]
;B[hg]
;W[gh]
;B[fh]
;W[gg]
;B[gf]
;W[fg]
;B[eg]
;W[ff]
;B[fe]
;W[ef]
;B[df]
;W[ee]
;B[ce]))
