(;SZ[19]AW[ga][pa][eb][gb][mb][nb][qb][rb][hc][ic][nc][oc][pc][rc][bd][hd][jd][md][be][fe][he][je][le][cf][df][gf][hf][qf][sf][fg][hg][ig][jg][mg][rg][sg][ch][fh][lh][qh][rh][ci][fi][gi][ii][ji][ki][li][pi][qi][ri][gj][hj][qj][sj][ck][gk][hk][ik][nk][rk][sk][bl][cl][dl][nl][ql][cm][mm][qm][bn][cn][kn][co][fo][ho][hp][jp][np][cq][fq][gq][nq][qq][rq][nr][pr][rr][os]AB[fa][cb][fb][lb][pb][bc][dc][fc][jc][kc][lc][mc][qc][cd][dd][fd][id][nd][od][pd][qd][rd][ce][ie][ke][me][re][se][if][jf][kf][lf][mf][pf][rf][gg][kg][lg][pg][qg][dh][gh][hh][ih][jh][kh][ph][sh][di][hi][oi][dj][fj][ij][jj][kj][lj][nj][pj][dk][ek][mk][pk][qk][el][hl][jl][pl][rl][sl][dm][fm][hm][jm][pm][rm][dn][en][gn][pn][bo][go][bp][cp][dp][fp][gp][pp][qp][rp][dq][oq][pq][dr][or]C[B to play a tesuji (perfect move)]GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]KM[0.00]PW[sai]PB[toya koyo]
(;B[ef]
(;W[ff]C[white mistakes]
(;B[ee];W[eg];B[dg]C[Correct! White is dead. Check it on your own if you are unsure.RIGHT]TR[eg][fg][ff][fe][gf][hf][he][hd][hc][ic][gb][ga][gi][fi][fh][gj][gk][hk][hj][ik][hg][ig][jg])
(;B[eg];W[ee];B[de]C[Correct! White is dead. Check it on your own if you are unsure.RIGHT]TR[ee][fe][ff][fg][fh][fi][gi][gj][gk][hk][hj][ik][gf][hf][he][hd][hc][ic][hg][ig][jg][gb][ga])
(;B[dg];W[ee]
(;B[de];W[eg]C[alive...])
(;B[eg];W[de]C[alive...]))
(;B[de];W[eg]
(;B[dg];W[ee]C[alive...])
(;B[ee];W[dg]C[alive...])))
(;W[ee]C[white's correct play]
(;B[eg];W[dg];B[eh];W[de];B[ff]TR[fg][fh][fi][gi][gj][hk][gk][hj][ik]C[Correct!RIGHT])
(;B[de];W[dg]C[alive...]))
(;W[eg]C[white's correct play]
(;B[ee];W[dg];B[ff]TR[fe][gf][hf][hg][ig][jg][he][hd][hc][ic][gb][ga]C[Correct!RIGHT])
(;B[dg];W[ee]C[alive...])))
(;B[bg];W[dg]C[You can have 2 stones. White saves many.])
(;B[cj];W[bj]C[The push was too big to neglect. Now what?]
(;B[ef];W[ee];B[eg];W[ff];B[de];W[jb]
(;B[ka];W[gd]
(;B[ia];W[ib];B[ja];W[ha];B[gc]C[Yeah!RIGHT])
(;B[ib];W[ia])
(;B[ja];W[ia]))
(;B[gd];W[ka]
(;B[la];W[ia];B[kb];W[hb]C[Ko])
(;B[ia];W[la])
(;B[ib];W[la]))
(;B[la];W[gd]))
(;B[bg];W[dg]
(;B[cg];W[bh])
(;B[bf];W[bh]C[2 stones is not enough.])
(;B[bi];W[bh]
(;B[bf]C[2 stones is not enough])
(;B[cg];W[ai])))
(;B[bf];W[dg]C[Nope.])))