Problem 17092 goproblems.com


Author	wurfmaul	Created	2013-01-21
Difficulty	2 kyu (history)	Source	self-made
AVG solve time	70 sec	Stars	2.75 (4 votes)
User attempts	234 / 587	Collections	Middle based, Instruction Required, Symmetrical, Fun
Genre	life and death	Your attempts	N/A
Similar problems
Created	2013-01-21
Source	self-made
Stars	2.75 (4 votes)
Collections	Middle based, Instruction Required, Symmetrical, Fun
Your attempts	N/A

(;AB[jj]AB[ii]AB[ik]AB[gi]AB[gj]AB[gk]AB[ki]AB[kk]AB[im]AB[jm]AB[km]AB[mi]AB[mj]AB[mk]AB[kg]AB[jg]AB[ig]AW[fh]AW[fi]AW[fj]AW[fk]AW[fl]AW[gl]AW[hl]AW[hm]AW[hn]AW[in]AW[jn]AW[kn]AW[ln]AW[lm]AW[ll]AW[ml]AW[nl]AW[nk]AW[nj]AW[ni]AW[nh]AW[mh]AW[lh]AW[lg]AW[lf]AW[kf]AW[jf]AW[if]AW[hf]AW[hg]AW[hh]AW[gh]LB[hd:A]LB[jd:U]LB[ld:D]C[What's the status of the black group, alive (A), unsettled (U), or dead (D)?FORCE]AP[goproblems] (;B[ld] (;W[li]AB[jf]AB[kf]AB[lf]AB[lg]AB[lh]AB[mh]AB[nh]AB[ni]AB[nj]AB[nk]AB[nl]AB[hm]AB[fi]AB[hh]AB[hf]AB[hg]AB[if]AB[gh]AB[fh]AB[fk]AB[fj]AB[hl]AB[fl]AB[gl]AB[kn]AB[in]AB[hn]AB[jn]AB[ln]AB[ll]AB[ml]AB[lm]AW[mi]AW[mj]AW[mk]AW[ki]AW[jj]AW[kg]AW[ig]AW[jg]AW[ii]AW[gi]AW[gj]AW[gk]AW[ik]AW[kk]AW[jm]AW[im]AW[km]C[Then, show how to kill!] (;B[jh]C[Yes, white is dead. It's not trivial, but white cannot offer strong resistance anymore. The marked points are important.RIGHT]TR[hj]TR[jl]) (;B[hj]C[Yes, white is dead. It's not trivial, but white cannot offer strong resistance anymore. The marked points are important.RIGHT]TR[jl]TR[jh]) (;B[jl]C[Yes, white is dead. It's not trivial, but white cannot offer strong resistance anymore. The marked points are important.RIGHT]TR[hj]TR[jh]) (;B[lk];W[lj] (;B[jh]C[Yes, white is dead. It's not trivial, but white cannot offer strong resistance anymore. The marked points are important.RIGHT]TR[hj]TR[jl]) (;B[hj]C[Yes, white is dead. It's not trivial, but white cannot offer strong resistance anymore. The marked points are important.RIGHT]TR[jl]TR[jh]) (;B[jl]C[Yes, white is dead. It's not trivial, but white cannot offer strong resistance anymore. The marked points are important.RIGHT]TR[hj]TR[jh]) (;B[kh];W[hi]C[White is alive now!]) (;B[ih];W[hi]C[White is alive now!]) (;B[hi];W[kh]C[White is alive now!]) (;B[hk];W[kh]C[White is alive now!]) (;B[il];W[hi]C[White is alive now!]) (;B[kl];W[hi]C[White is alive now!])) (;B[kh];W[hi]C[White is alive now!]) (;B[ih];W[hi]C[White is alive now!]) (;B[hi];W[kh]C[White is alive now!]) (;B[hk];W[kh]C[White is alive now!]) (;B[il];W[hi]C[White is alive now!]) (;B[kl];W[hi]C[White is alive now!]) (;B[lj];W[lk]C[The lower half is blocked because of symmetry,FORCE] (;B[hj];W[ij]C[White is alive now!]) (;B[jh];W[hi]C[White is alive now!]) (;B[kh];W[hi]C[White is alive now!]) (;B[ih];W[hi]C[White is alive now!]) (;B[hi];W[kh]C[White is alive now!]))) (;W[lj]AW[mi]AW[mj]AW[mk]AB[nk]AB[nj]AB[ni]AB[nh]AB[mh]AB[lh]AB[lg]AB[lf]AB[jf]AB[if]AB[hg]AB[hh]AB[gh]AB[fh]AB[fi]AB[fj]AB[fk]AB[fl]AB[gl]AB[hl]AB[hm]AB[hn]AB[ln]AB[jn]AB[in]AB[kn]AB[lm]AB[ll]AB[ml]AB[nl]AW[kk]AW[jj]AW[ii]AW[ik]AW[ki]AW[kg]AW[jg]AW[ig]AW[gi]AW[gk]AW[gj]AB[kf]AB[hf]AW[im]AW[jm]AW[km]C[This doesn't work either.] (;B[jl]C[RIGHT]) (;B[hj]C[RIGHT]) (;B[jh]C[RIGHT]))) (;B[jd]C[No, the group is actually dead.]) (;B[hd]C[No, the group is actually dead.]))