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life and death
flag problem... Well Constructed Needs Fixing Invalid Duplicate
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Problem 10098
Created 2007-06-05
Name live
Source KGS game
Rating
Difficulty 9 dan
Average Solve Time 46 secs
User Attempts
69 / 1062
Solve Ratio Rating 5 dan
rating history
Thanks a lot to Dennis1 and Lok for the time they spend on that problem to correct it. I had to add some stones that were there in the real game and that I missed to put. Many hard variations in the tree if you feel good. If something still does not work, please tell me.
(;AB[lr]AB[kq]AB[jq]AB[jp]AB[lp]AB[np]AB[oo]AB[on]AB[pp]AB[pq]AB[oq]AW[iq]AW[ip]AW[nm]AW[om]AW[pn]AW[po]AW[pm]AW[qp]AW[qq]AW[mq]AW[kr]AW[jr]C[White has just played the marked stone. How should black answer to live?]AW[pr]TR[mq]AW[hp]AW[jo]AW[kn]AW[km]AW[ln]AB[lm]AB[kl]AB[ml]AB[kk]AB[mk]AP[goproblems]
(;B[or]
(;W[qr]C[CHOICE];B[mr]C[]
(;W[no]C[CHOICE]
(;B[nq]C[RIGHT])
(;B[nn]C[RIGHT])
(;B[lq]C[RIGHT])
(;B[mo]C[RIGHT]))
(;W[nr];B[ns]
(;W[no];B[nq];W[ls];B[ms]C[RIGHT])
(;W[nq]
(;B[no]C[RIGHT])
(;B[ls];W[no];B[mp]C[RIGHT])))
(;W[lq];B[kp];W[mp];B[mo];W[nn];B[no];W[os];B[nr]C[RIGHT]))
(;W[lq]
(;B[qr]
(;W[kp];B[nq]
(;W[no];B[mr];W[rr];B[ps];W[ns];B[ms]C[RIGHT])
(;W[mr]
(;B[no];W[nr];B[os];W[rr];B[ps]C[RIGHT])
(;B[ps];W[no];B[rr]C[RIGHT])))
(;W[rr];B[ps]
(;W[nq];B[nr];W[mr];B[ms];W[ls];B[ns]C[])
(;W[mr];B[ns];W[nr];B[nq]C[RIGHT])))
(;B[mp];W[qr]
(;B[mr];W[kp];B[nq];W[ns]
(;B[ms];W[os])
(;B[os];W[no];B[kq];W[lq])
(;B[no];W[os]))
(;B[kp];W[mr])))
(;W[mr]
(;B[nn]
(;W[mn]
(;B[nq];W[mp];B[qr];W[rr];B[ps];W[no];B[mo];W[lo];B[no]C[])
(;B[mo];W[mp];B[lo]
(;W[nq];B[lq]C[RIGHT])
(;W[lq];B[qr];W[nq];B[nr]C[RIGHT]
(;W[rr];B[ps];W[ns])
(;W[ls];B[ns];W[kp];B[no];W[ko];B[op];W[rr];B[ps]))))
(;W[nq];B[mp];W[mn];B[mo];W[qr];B[nr];W[ls];B[lq];W[ms];B[ns];W[ir];B[ks]C[RIGHT])
(;W[qr]C[CHOICE]
(;B[nq]
(;W[mp]
(;B[mo];W[mn]
(;B[nr]C[];W[lo])
(;B[ms];W[lo];B[no];W[ns]))
(;B[mn];W[mm];B[mo]C[]))
(;W[mo];B[mp];W[ls];B[lq];W[ir];B[mn];W[mm];B[lo]C[])
(;W[mn];B[mo];W[mp];B[ms];W[lo];B[no];W[ns]))
(;B[mo]C[RIGHT]
(;W[nq];B[mn]
(;W[mm];B[lq];W[lo];B[nr];W[ls];B[mp];W[ms];B[ns]C[RIGHT])
(;W[mp];B[mm];W[lq];B[lo];W[kp]C[RIGHT]))
(;W[mn];B[lq]
(;W[mp];B[lo]
(;W[ko];B[ms]C[RIGHT])
(;W[ls];B[ko]
(;W[nq];B[nr]C[RIGHT])
(;W[ir];B[nq]C[RIGHT]))
(;W[nq];B[nr]C[RIGHT]))
(;W[lo];B[mp];W[nq];B[nr]C[RIGHT])
(;W[nq];B[nr];W[ls];B[mp];W[ms];B[ns];W[ir];B[ks]C[RIGHT]))
(;W[lq];B[nq]
(;W[mn];B[mp]C[RIGHT])
(;W[mp];B[mn]C[RIGHT]))
(;W[mp];B[lq]
(;W[lo];B[mn];W[mm];B[nq]C[RIGHT])
(;W[mm];B[mn]C[RIGHT]
(;W[lo];B[nq])
(;W[nq];B[nr])))))
(;W[mo]
(;B[mn];W[mm]
(;B[mp];W[lo]
(;B[qr];W[rr];B[ps];W[ns]
(;B[lq];W[ls]
(;B[nq];W[no];B[nr];W[ir];B[ms];W[mr])
(;B[no];W[rs];B[nr]C[RIGHT]
(;W[ms];B[nq];W[qs];B[os])
(;W[ir];B[nq];W[ms];B[os];W[ks];B[qs])
(;W[qs];B[nq];W[ms];B[os])))
(;B[rs]C[RIGHT]))
(;B[no];W[qr];B[lq];W[ls]))
(;B[lo];W[mp];B[qr]
(;W[lq];B[rr];W[nq];B[ps])
(;W[nq];B[rr];W[no];B[op];W[nr];B[ps])))
(;B[mp]C[RIGHT]
(;W[lq];B[mn]
(;W[mm];B[lo]
(;W[nq]
(;B[nr]
(;W[ls];B[qr])
(;W[kp];B[qr])
(;W[qr];B[ms]))
(;B[qr]))
(;W[qr];B[nq]))
(;W[qr];B[mm])
(;W[ls];B[nq]
(;W[mm];B[lo])
(;W[lo];B[mm])))
(;W[nq];B[nr]
(;W[mn];B[qr];W[no];B[ms];W[op];B[lq])
(;W[qr];B[mn];W[mm];B[lo];W[ls];B[lq]))
(;W[qr];B[mn]
(;W[lo];B[mm])
(;W[mm];B[lo];W[nq];B[nr];W[ls];B[lq])))))
(;B[mp]C[RIGHT]
(;W[qr];B[nn];W[mo];B[mn]
(;W[lo];B[mm])
(;W[mm];B[lo];W[nq];B[nr];W[ls];B[lq]))
(;W[no];B[nn]
(;W[mo];B[mn];W[lo];B[mm])
(;W[mn];B[mo]
(;W[nq];B[nr];W[ls])
(;W[lq];B[nq])))
(;W[nn];B[qr]
(;W[rr];B[ps];W[nq];B[nr])
(;W[nq];B[nr]))
(;W[lq];B[nn];W[mn];B[mo];W[nq];B[nr]
(;W[qr];B[ms])
(;W[ls];B[qr]))
(;W[mn];B[qr]
(;W[lq]
(;B[nq];W[no];B[nr];W[ls])
(;B[no];W[os];B[ps];W[nq];B[nr];W[ls];B[ns]))
(;W[nq];B[nr];W[ls]))
(;W[mo]
(;B[nn];W[mn];B[qr];W[lq])
(;B[nr];W[qr];B[ls];W[lq]
(;B[kp])
(;B[nq];W[kp]))
(;B[qr]
(;W[rr];B[ps];W[nq];B[nr])
(;W[nq];B[nr];W[ls];B[lq])
(;W[nn];B[no];W[nq];B[nr]))))
(;B[qr]C[RIGHT]
(;W[mp]
(;B[nr];W[ns];B[ps];W[rr];B[mo];W[nn])
(;B[mn];W[nn];B[mo];W[no])
(;B[mo];W[mn];B[nn];W[lo])
(;B[rr];W[nq]
(;B[nr];W[ps];B[os])
(;B[ps])))
(;W[rr];B[ps]
(;W[ns];B[nq]
(;W[nn])
(;W[no]
(;B[nn];W[mo];B[mn];W[mm]
(;B[lo];W[mp])
(;B[mp]))
(;B[mo];W[nn];B[lq];W[ls];B[nr];W[ks];B[mp];W[ms])
(;B[mp];W[nn];B[lq];W[ls];B[nr]
(;W[ms];B[os])
(;W[ks];B[ms];W[mr];B[os];W[ir]))
(;B[lo];W[lq];B[mo];W[nn];B[mn];W[mm];B[nr];W[ls])))
(;W[mo]
(;B[nq];W[no])
(;B[no]
(;W[mp];B[nq])
(;W[nq];B[mp];W[lq];B[nr]))))
(;W[mo];B[nq];W[no];B[mp]
(;W[nn];B[ms];W[ns];B[ls])
(;W[ls];B[lq];W[ms];B[rr]))
(;W[nq];B[mp];W[no];B[nn])
(;W[no];B[rr];W[nq];B[mp]))
(;B[mo]C[RIGHT]
(;W[nn];B[lq];W[no];B[mn]
(;W[mm];B[ms];W[ns];B[ls];W[os];B[qr];W[rr];B[ps];W[op];B[mp])
(;W[op];B[mp];W[nq];B[nr];W[mm];B[ms];W[qr];B[mq]))
(;W[qr];B[mm];W[nn];B[mn];W[no];B[op];W[mp];B[lq];W[os];B[ns];W[nr];B[ps];W[nq];B[os];W[qs])
(;W[lo];B[mn];W[mm];B[nn]
(;W[mp])
(;W[nq];B[mp];W[ls];B[lq];W[ms];B[qr]))
(;W[mp];B[mn];W[mm];B[nn];W[nq]
(;B[nr];W[ls])
(;B[qr])))
(;B[mn]C[RIGHT]
(;W[mo]
(;B[nn];W[mm];B[lo];W[mp];B[qr]
(;W[lq];B[rr];W[nq];B[ps])
(;W[nq];B[rr];W[no];B[op];W[nr];B[ps]))
(;B[mp]
(;W[lq];B[nn];W[mm];B[lo];W[nq];B[nr]
(;W[ls];B[qr])
(;W[kp];B[qr])
(;W[qr];B[ms]))
(;W[nn];B[nq];W[qr]
(;B[ms];W[ns];B[ls];W[os];B[nr];W[no];B[lq])
(;B[ns];W[ls];B[lq];W[ir];B[nr];W[ks];B[no];W[ms];B[lo];W[mm];B[ko]))))
(;W[mm];B[nn];W[mo];B[lo];W[mp];B[qr];W[rr];B[ps];W[ns];B[no];W[nq]))))
(;B[mr];W[or]
(;B[no];W[nq];B[op];W[nr])
(;B[nr];W[nq];B[op];W[mo];B[mp];W[ir]
(;B[ls];W[ns])
(;B[ns];W[ls]))
(;B[lq];W[nq]
(;B[op];W[nr])
(;B[nr];W[op])))
(;B[lq];W[or]
(;B[nr];W[nq]
(;B[op];W[mr])
(;B[mr];W[op]))
(;B[nq];W[nr];B[mr];W[no];B[mo];W[nn];B[lo];W[ko]))
(;B[nr];W[or]
(;B[no];W[nq];B[op];W[mr])
(;B[nq];W[lq];B[kp];W[mr];B[ms];W[ls];B[mp];W[lr])))
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