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life and death
flag problem... (1) Well Constructed (1) Needs Fixing Invalid Duplicate
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Problem 4330
Created 2004-04-23
Source Variation on problem 4239
Rating
Difficulty 9 dan
Average Solve Time 60 secs
User Attempts
55 / 269
Solve Ratio Rating 1 kyu
rating history
Kept this one in the sandpit for over 6 years! Now, finally, I spent some more time on it and feel confident to bring it out in the open. Black to kill.
(;AB[gq]AB[gp]AB[hp]AB[ip]AB[jp]AB[kp]AB[lp]AB[mp]AB[mq]AB[fr]AB[hr]AW[gr]AW[hq]AW[iq]AW[jq]AW[kq]AW[lq]AW[gs]AW[is]AP[goproblems]
(;B[fs]
(;W[hs]C[CHOICE]
(;B[js];W[ir]
(;B[mr];W[ks]
(;B[kr];W[lr];B[ls]C[White cannot approach and dies...!RIGHT])
(;B[ls];W[kr])
(;B[jr];W[lr])
(;B[lr];W[kr])
(;B[ms];W[kr]))
(;B[lr];W[kr]
(;B[ks];W[mr])
(;B[ls];W[ks])
(;B[mr];W[ks])
(;B[ms];W[ks])
(;B[jr];W[mr])
(;B[nr];W[ks])
(;B[ns];W[ks]))
(;B[ms];W[ks]
(;B[kr];W[lr]
(;B[ls];W[jr]
(;B[ks];W[mr])
(;B[mr];W[ks]))
(;B[mr];W[ls]))
(;B[lr];W[kr])
(;B[ls];W[kr])
(;B[jr];W[lr])
(;B[mr];W[kr]))
(;B[ls];W[mr]
(;B[lr];W[kr]
(;B[ks];W[ms])
(;B[nr];W[ks])
(;B[ms];W[nr])
(;B[ns];W[ks]))
(;B[kr];W[lr]
(;B[nr];W[jr])
(;B[ms];W[nr])
(;B[ns];W[nr]))
(;B[ms];W[nr]
(;B[lr];W[kr])
(;B[kr];W[lr])
(;B[ks];W[ns]))
(;B[ks];W[nr])
(;B[nr];W[kr]
(;B[ms];W[ks])
(;B[ks];W[ms])
(;B[lr];W[ks])
(;B[ns];W[ks]))
(;B[ns];W[nr]
(;B[lr];W[kr])
(;B[ms];W[or])
(;B[or];W[kr]
(;B[nq])
(;B[ks];W[ms])
(;B[ms];W[ks]))
(;B[kr];W[lr])
(;B[ks];W[ms])
(;B[os];W[ms])))
(;B[kr];W[lr]
(;B[ls];W[mr]
(;B[nr];W[jr])
(;B[ms];W[nr])
(;B[ns];W[nr]))
(;B[mr];W[ls])
(;B[ms];W[mr]))
(;B[ks];W[lr]))
(;B[lr];W[kr]
(;B[js];W[ir]
(;B[ks];W[mr])
(;B[ls];W[ks])
(;B[mr];W[ks])
(;B[ms];W[ks])
(;B[jr];W[mr])
(;B[nr];W[ks])
(;B[ns];W[ks]))
(;B[mr];W[ks])
(;B[ks];W[mr])
(;B[ms];W[ks])
(;B[jr];W[ir])
(;B[ir];W[jr];B[ks];W[mr])
(;B[ls];W[ks]))
(;B[mr];W[ks])
(;B[ls];W[mr]
(;B[js];W[ir]
(;B[lr];W[kr]
(;B[ks];W[ms])
(;B[nr];W[ks])
(;B[ms];W[nr])
(;B[ns];W[ks]))
(;B[kr];W[lr]
(;B[nr];W[jr])
(;B[ms];W[nr])
(;B[ns];W[nr]))
(;B[ms];W[nr]
(;B[lr];W[kr])
(;B[kr];W[lr])
(;B[ks];W[ns]))
(;B[ks];W[nr])
(;B[nr];W[kr]
(;B[ms];W[ks])
(;B[ks];W[ms])
(;B[lr])
(;B[ns];W[ks]))
(;B[ns];W[nr]
(;B[lr];W[kr])
(;B[ms];W[or])
(;B[or];W[kr]
(;B[nq])
(;B[ks];W[ms])
(;B[ms];W[ks]))
(;B[kr];W[lr])
(;B[ks];W[ms])
(;B[os];W[ms])))
(;B[nr];W[ms]
(;B[ns]
(;W[ks];B[lr];W[kr])
(;W[kr]))
(;B[lr];W[kr];B[ns];W[ks])
(;B[js];W[ir]
(;B[lr];W[kr]
(;B[ns];W[ks])
(;B[ks];W[jr]))
(;B[ns];W[lr]))
(;B[kr];W[lr]
(;B[js];W[ir])
(;B[ns];W[ks])))
(;B[jr];W[ir]
(;B[lr];W[kr])
(;B[nr];W[kr])
(;B[kr];W[lr])
(;B[ks];W[kr])
(;B[ms];W[kr]))
(;B[kr];W[lr])
(;B[lr];W[kr]
(;B[nr];W[ks])
(;B[js];W[ir]
(;B[ks];W[ms])
(;B[nr];W[ks])
(;B[ms];W[nr])
(;B[ns];W[ks]))
(;B[ks];W[js]))
(;B[ms];W[nr]
(;B[js];W[ir]
(;B[lr];W[kr])
(;B[kr];W[lr])
(;B[ks];W[ns]))
(;B[lr];W[kr]))
(;B[ks];W[lr])))
(;W[mr]C[This is no doubt the wiser option for White, but way less fun!]
(;B[nr]
(;W[ir]
(;B[ms];W[kr]
(;B[hs];W[ls];B[lr]C[Ko. Best result for both.RIGHT])
(;B[ls];W[hs])
(;B[ks];W[js]
(;B[hs];W[lr])
(;B[ls];W[hs])
(;B[lr];W[hs])
(;B[ns];W[hs]))
(;B[js];W[ls]
(;B[hs];W[ns])
(;B[lr]C[KoRIGHT])
(;B[ns];W[hs])
(;B[ks];W[ns];B[os];W[hs];B[ms];W[lr]))
(;B[lr];W[hs])
(;B[ns];W[hs]))
(;B[kr];W[lr]
(;B[ls])
(;B[ms];W[ks]
(;B[hs];W[jr])
(;B[jr];W[hs]))
(;B[hs];W[ks]
(;B[jr];W[ms])
(;B[ms];W[jr]))
(;B[ks];W[hs])
(;B[js];W[hs]))
(;B[lr];W[kr]
(;B[ms];W[hs])
(;B[hs];W[ls])
(;B[ls];W[hs])
(;B[ks];W[ls])
(;B[js];W[ls]))
(;B[ls];W[ms]
(;B[lr];W[kr]
(;B[hs];W[ks])
(;B[ks];W[js])
(;B[ns];W[hs])
(;B[js];W[ks]))
(;B[kr];W[lr]
(;B[hs];W[ks])
(;B[ks];W[hs])
(;B[js];W[hs])
(;B[ns];W[hs]))
(;B[js];W[lr]
(;B[hs];W[ks])
(;B[ks];W[hs]))
(;B[ns];W[lr]
(;B[ks];W[hs])
(;B[hs];W[ks]))
(;B[ks];W[kr]
(;B[ns];W[lr]
(;B[hs];W[js])
(;B[js];W[hs]))
(;B[lr];W[js])
(;B[hs];W[js]))
(;B[hs];W[ks]))
(;B[ks];W[kr]
(;B[hs];W[ls])
(;B[ls];W[js]
(;B[hs];W[ms])
(;B[ms];W[hs]))
(;B[ms];W[js]
(;B[hs];W[lr])
(;B[ls];W[hs])
(;B[lr];W[hs])
(;B[ns];W[hs]))
(;B[js];W[ls]
(;B[hs];W[jr])
(;B[ns];W[hs]))
(;B[ns];W[hs]
(;B[ms];W[lr]
(;B[ls];W[js])
(;B[js];W[ls]))
(;B[ls];W[js])
(;B[js];W[ls])))
(;B[jr];W[kr]
(;B[hs];W[ls])
(;B[ls];W[hs])
(;B[ms];W[hs])
(;B[ks];W[ls]))
(;B[js];W[ks]
(;B[kr];W[jr])
(;B[hs];W[ms])
(;B[ms];W[lr]
(;B[hs];W[jr])
(;B[jr];W[hs]))
(;B[lr];W[kr]
(;B[hs];W[ms])
(;B[ms];W[hs]))
(;B[ls];W[kr]
(;B[hs];W[ms])
(;B[ms];W[hs])))
(;B[hs]
(;W[kr]C[CHOICE]
(;B[ms];W[ls];B[lr]C[Ko. Best result for both.RIGHT])
(;B[ls];W[ms]
(;B[ns];W[lr])
(;B[ks];W[js])
(;B[js];W[ks]))
(;B[ks];W[ls])
(;B[js];W[ms])
(;B[ns];W[ms]
(;B[ls];W[lr])
(;B[ks]))
(;B[lr];W[ls]))
(;W[ks];B[ms]C[RIGHT])
(;W[ms];B[kr];W[ks];B[lr]C[RIGHT]))
(;B[ns];W[lr]
(;B[ks];W[hs])
(;B[ls];W[ks])
(;B[hs];W[ks])
(;B[ms];W[hs])
(;B[js];W[hs])))
(;W[ms]
(;B[hs]
(;W[ir];B[kr];W[ks];B[lr]C[RIGHT])
(;W[ks];B[ir]C[RIGHT])
(;W[kr];B[ir]C[RIGHT]))
(;B[ir]C[RIGHT])
(;B[lr];W[kr];B[ir];W[ls];B[jr]C[RIGHT]))
(;W[jr];B[hs]C[RIGHT])
(;W[js];B[hs]C[RIGHT])
(;W[hs];B[js];W[ir];B[ms]C[RIGHT])
(;W[ls];B[hs];W[kr];B[ir]C[RIGHT])
(;W[lr];B[hs]C[RIGHT])
(;W[kr];B[ir]C[RIGHT])
(;W[ks];B[hs]
(;W[ms];B[ir]C[RIGHT])
(;W[ir];B[ms]C[RIGHT])))
(;B[hs];W[nr])
(;B[ir];W[jr];B[hs];W[nr])
(;B[lr];W[ls]
(;B[hs];W[ir]
(;B[kr];W[ks]
(;B[jr];W[js]
(;B[kr];W[nr])
(;B[nr];W[kr]))
(;B[nr];W[jr]))
(;B[nr];W[kr]))
(;B[ir];W[kr]
(;B[nr];W[jr]
(;B[hs];W[js])
(;B[js];W[hs])
(;B[ns];W[hs]))
(;B[jr];W[nr])
(;B[hs];W[nr])
(;B[js];W[nr]))
(;B[kr];W[jr]
(;B[hs];W[ks]
(;B[nr];W[ir])
(;B[ir];W[nr]))
(;B[nr];W[ks])
(;B[ks];W[js]))
(;B[jr];W[kr]
(;B[hs];W[ir])
(;B[ir];W[nr])
(;B[nr];W[ir])
(;B[js];W[ir]))
(;B[js]
(;W[ks])
(;W[kr]
(;B[nr];W[ir])
(;B[hs];W[ir])
(;B[ir];W[nr])))
(;B[ks];W[kr])
(;B[nr];W[kr]
(;B[hs];W[ir])
(;B[ir];W[jr]
(;B[hs];W[js])
(;B[js];W[hs])
(;B[ns];W[hs]))
(;B[js];W[ir])
(;B[ns];W[ms]
(;B[ir];W[js])
(;B[hs];W[ir])
(;B[js];W[ir]))))))
(;B[mr];W[ks]
(;B[fs];W[hs])
(;B[lr];W[kr])
(;B[ir];W[jr])
(;B[jr];W[ir])
(;B[ls];W[lr])
(;B[kr];W[lr]))
(;B[lr];W[kr]
(;B[mr];W[ir])
(;B[ms];W[ir])
(;B[ks];W[mr];B[fs];W[hs])
(;B[fs];W[hs]
(;B[js];W[ir])
(;B[mr];W[ks])
(;B[ks];W[mr])
(;B[ms];W[ks])
(;B[jr];W[ir])
(;B[ir];W[jr];B[ks];W[mr])
(;B[ls];W[ks]))
(;B[ir];W[mr]
(;B[jr];W[ls]
(;B[nr];W[js])
(;B[fs];W[nr])
(;B[js];W[ks]))
(;B[fs];W[ls]
(;B[nr];W[jr]
(;B[hs];W[js])
(;B[js];W[hs])
(;B[ns];W[hs]))
(;B[jr];W[nr])
(;B[hs];W[nr])
(;B[js];W[nr]))
(;B[ls];W[ks];B[jr];W[ms];B[fs];W[or])
(;B[nr];W[ls]
(;B[jr];W[js])
(;B[fs];W[jr]
(;B[hs];W[js])
(;B[js];W[hs])
(;B[ns];W[hs]))
(;B[js];W[jr]
(;B[fs];W[hs])
(;B[hs];W[is]))
(;B[ns];W[jr]))
(;B[js];W[ls]
(;B[hs];W[jr]
(;B[fs];W[nr])
(;B[nr];W[is]))
(;B[jr];W[ks])
(;B[fs];W[nr])
(;B[nr];W[jr]
(;B[fs])
(;B[hs];W[is])))
(;B[ks];W[ls]
(;B[jr];W[js])
(;B[nr];W[js])
(;B[fs];W[nr])))
(;B[ls];W[ir]))
(;B[hs];W[ir]
(;B[mr];W[lr])
(;B[lr];W[kr])
(;B[ks];W[mr];B[lr];W[kr])
(;B[ls];W[mr];B[lr];W[kr])
(;B[ms];W[lr]))
(;B[ir];W[jr]
(;B[lr]
(;W[ks];B[kr];W[hs];B[mr];W[er];B[fq];W[fs])
(;W[mr]
(;B[kr]
(;W[js];B[nr])
(;W[hs];B[nr];W[er]))
(;B[nr];W[ks]
(;B[ms];W[kr])
(;B[ls];W[hs])
(;B[fs];W[hs]))
(;B[ks];W[hs];B[nr];W[er])
(;B[ls];W[ks])
(;B[ms];W[ks])))
(;B[mr];W[lr])
(;B[ls];W[lr]
(;B[mr];W[ks])
(;B[ks];W[mr]))
(;B[ks];W[lr])
(;B[fs];W[hs]
(;B[lr];W[ks])
(;B[mr];W[ks])
(;B[ks];W[lr])
(;B[ls];W[lr]
(;B[mr];W[ks])
(;B[ks];W[mr]))))
(;B[jr];W[ir])
(;B[kr];W[lr];B[fs];W[hs]
(;B[js];W[ir]
(;B[ls];W[mr])
(;B[mr];W[ls])
(;B[ms];W[mr]))
(;B[mr];W[jr]))
(;B[js];W[ks]
(;B[fs];W[jr]
(;B[hs];W[lr]
(;B[ir];W[mr])
(;B[mr];W[ir]))
(;B[lr];W[hs]
(;B[kr];W[mr])
(;B[mr];W[kr])
(;B[ls];W[kr])
(;B[ms];W[kr])))
(;B[hs];W[ir])
(;B[ir];W[jr]
(;B[lr];W[kr])
(;B[fs];W[hs]))
(;B[jr];W[ir])
(;B[kr];W[jr])
(;B[ls];W[jr])
(;B[lr];W[jr]
(;B[fs];W[hs]
(;B[kr];W[mr])
(;B[mr];W[kr])
(;B[ls];W[kr])
(;B[ms];W[kr]))
(;B[mr];W[kr])
(;B[ms];W[kr])
(;B[ls];W[kr])
(;B[kr];W[mr])))
(;B[ks];W[lr]
(;B[fs];W[hs]
(;B[js];W[ir])
(;B[mr];W[ls])
(;B[jr];W[ir])
(;B[ls];W[mr]))
(;B[ir];W[jr])
(;B[mr];W[ls]))
(;B[ls]
(;W[mr]
(;B[fs];W[hs]
(;B[js];W[ir])
(;B[nr];W[ms]
(;B[ns]
(;W[ks];B[lr];W[kr])
(;W[kr]))
(;B[lr];W[kr];B[ns];W[ks])
(;B[js];W[ir]
(;B[lr];W[kr]
(;B[ns];W[ks])
(;B[ks];W[jr]))
(;B[ns];W[lr]))
(;B[kr];W[lr]
(;B[js];W[ir])
(;B[ns];W[ks])))
(;B[jr];W[ir]
(;B[lr];W[kr])
(;B[nr];W[kr])
(;B[kr];W[lr])
(;B[ks];W[kr])
(;B[ms];W[kr]))
(;B[kr];W[lr])
(;B[lr];W[kr]
(;B[nr];W[ks])
(;B[js];W[ir])
(;B[ks];W[js]))
(;B[ms];W[nr]
(;B[js];W[ir])
(;B[lr];W[kr]))
(;B[ks];W[lr]))
(;B[js];W[ir]
(;B[nr];W[ms]
(;B[ns];W[lr])
(;B[lr];W[kr]
(;B[ns];W[ks])
(;B[ks];W[jr])
(;B[fs];W[ks]))
(;B[fs];W[lr]
(;B[hs];W[ks])
(;B[ks];W[hs])))
(;B[fs];W[hs]
(;B[lr];W[kr]
(;B[ks];W[ms])
(;B[nr];W[ks])
(;B[ms];W[nr])
(;B[ns];W[ks]))
(;B[kr];W[lr]
(;B[nr];W[jr])
(;B[ms];W[nr])
(;B[ns];W[nr]))
(;B[ms];W[nr]
(;B[lr];W[kr])
(;B[kr];W[lr])
(;B[ks];W[ns]))
(;B[ks];W[nr])
(;B[nr];W[kr]
(;B[ms];W[ks])
(;B[ks];W[ms])
(;B[lr])
(;B[ns];W[ks]))
(;B[ns];W[nr]
(;B[lr];W[kr])
(;B[ms];W[or])
(;B[or];W[kr]
(;B[nq])
(;B[ks];W[ms])
(;B[ms];W[ks]))
(;B[kr];W[lr])
(;B[ks];W[ms])
(;B[os];W[ms])))
(;B[lr];W[kr]
(;B[ks];W[ms])
(;B[nr];W[ks])
(;B[fs];W[hs]
(;B[ks];W[ms])
(;B[nr];W[ks])
(;B[ms];W[nr])
(;B[ns];W[ks]))))
(;B[nr];W[ms]
(;B[ns];W[lr])
(;B[lr];W[kr]
(;B[ns];W[ir])
(;B[fs];W[hs];B[ns];W[ks]))))
(;W[lr]
(;B[fs]
(;W[hs];B[js];W[ir])
(;W[ks];B[hs];W[jr]
(;B[mr];W[ir])
(;B[ir];W[mr])))
(;B[mr];W[ks])
(;B[kr];W[jr])
(;B[js]
(;W[jr]
(;B[fs];W[ks])
(;B[mr];W[ks])
(;B[ks];W[mr];B[fs]))
(;W[ir];B[mr])
(;W[ms]
(;B[ir];W[jr])
(;B[mr];W[ks];B[fs];W[jr]))))))
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