(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
AW[oo][mp][np][pp][qp][rp][kq][lq][mq][rq][sq][kr][ks]AB[nq][oq][pq][qq][lr][mr][rr][sr][ls][ms][rs][ss]KK[^Bestiary^Ishinoshita]
(;B[os]C[Only move (except for symmetry) to give unconditional life]
(;W[nr]
(;B[qs]C[hard to find tesuji]
(;W[or]
;B[pr]
;W[ns]
;B[mr]
;W[ps]C[how to prevent that ko ?]
;B[ms]C[by crushing (oshitsubushi)]
;W[qr]C[with every black stone captured or in atari...]
;B[os]
;W[nr]
;B[rr]C[the second ishinoshita succeeds])
(;W[pr]C[this vital point fails]
;B[or]
;W[ns]
;B[mr]C[simple (:-)) ishinoshita])
(;W[ns]
;B[or]C[life after the double threat]
(;W[pr]
;B[mr])
(;W[mr]
;B[pr])))
(;B[or]
;W[qr]C[One ishinoshita is not enough])
(;B[ps]
;W[qr])
(;B[pr]
;W[qs])
(;B[qr]C[the stongest incorrect resistance, but.]
;W[or]
;B[pr]
;W[ns]
;B[mr]
;W[ps]
;B[ms]
;W[os]C[dead (bulky five)]))
(;W[qr]C[only other plausible attack, but...]
;B[pr]
(;W[nr]
;B[qs])
(;W[qs]
;B[nr])))
(;B[nr]
;W[os]
;B[ps]
;W[pr]
;B[qr]
;W[qs]C[Black lives only in ko])
(;B[or]
;W[qr]
;B[pr]
;W[qs]
;B[ps]
;W[ns]C[Black is dead])
(;B[ns]
;W[qr]
;B[pr]
;W[os]
;B[ps]
;W[nr]C[Played in that order, nothing works
]))
