Problem 11215 goproblems.com


Author	Mocramis	Created	2008-04-19
Difficulty	2 dan (history)	Source	N/A
AVG solve time	70 sec	Stars	4 (3 votes)
User attempts	199 / 626	Collections	9*9 games, Ko / Ko Threats
Genre	life and death	Your attempts	N/A
Similar problems
Created	2008-04-19
Source	N/A
Stars	4 (3 votes)
Collections	9*9 games, Ko / Ko Threats
Your attempts	N/A

(;AB[ee]AB[ab]AB[aa]AB[ba]AB[bb]AB[bc]AB[ca]AB[da]AB[db]AB[dc]AB[ec]AB[fc]AB[dd]AB[de]AB[ce]AB[be]AB[df]AB[fd]AB[gd]AB[he]AB[hf]AB[hg]AB[ig]AB[gh]AB[gi]AB[fg]AB[ff]AW[cb]AW[cc]AW[cd]AW[bd]AW[ac]AW[ad]AW[ae]AW[af]AW[bf]AW[cf]AW[cg]AW[dg]AW[eg]AW[fh]AW[fi]AW[ei]AW[if]AW[ie]AW[id]AW[hd]AW[hc]AW[gc]AW[gb]AW[fb]AW[eb]AW[ea]SZ[9]AP[goproblems] (;B[di];W[eh] (;B[bh] (;W[ci] (;B[ch];W[dh] (;B[bi];W[ah] (;B[ef];W[ag] (;B[di];W[ga] (;B[ci]C[Well done, it's a seki! RIGHT]) (;B[bg];W[ci]C[Wrong! Black have no ko threats. CHOICE]) (;B[ai];W[ci]C[Wrong! Black have no ko threats. CHOICE])) (;B[bg];W[ai]C[CHOICE]) (;B[ai];W[bg]C[CHOICE])) (;B[bg];W[ag];B[di];W[ga] (;B[ef];W[ci]C[Wrong! Black have no ko threats. CHOICE]) (;B[ai];W[ci]C[CHOICE]) (;B[ci];W[ai]C[Wrong, white have two eyes.CHOICE]MA[bh]MA[ci])) (;B[ag];W[bg] (;B[di];W[ga] (;B[ef];W[ci]C[Wrong! Black have no ko threats.CHOICE]) (;B[ai];W[ci]C[CHOICE])) (;B[ef];W[ai]C[CHOICE])) (;B[ai];W[bg]C[CHOICE])) (;B[ah];W[bi] (;B[ai];W[ag] (;B[di];W[ci] (;B[ef]C[Well done, it's a seki!RIGHT]) (;B[bi];W[bg]C[CHOICE]) (;B[bg];W[bi]C[CHOICE])) (;B[ef];W[bg]C[CHOICE])) (;B[bg];W[ag]C[CHOICE]) (;B[ag];W[bg]C[CHOICE]) (;B[ef];W[ag]C[Well done, it's a seki!RIGHT])) (;B[ai];W[ag] (;B[bi];W[ah] (;B[di];W[ga];B[ef];W[ci]C[Wrong! Black have no ko threats. CHOICE]) (;B[ef];W[bg]C[CHOICE])) (;B[ah];W[bg];B[ef];W[bi]C[CHOICE]) (;B[bg];W[ah];B[ef];W[bi]C[CHOICE]) (;B[ef];W[ah] (;B[bi];W[bg]C[CHOICE]) (;B[bg];W[bi]C[CHOICE]))) (;B[bg];W[bi] (;B[ai];W[ah]C[CHOICE]) (;B[ah];W[ag]C[CHOICE]) (;B[ag];W[ah]C[CHOICE]) (;B[ef];W[ah]C[CHOICE])) (;B[ag];W[bi] (;B[ai];W[ah]C[Wrong! Black have no ko threats. CHOICE]) (;B[ah];W[bg]C[CHOICE]) (;B[bg];W[ah]C[CHOICE]) (;B[ef];W[ai]C[CHOICE])) (;B[ef];W[bi] (;B[ah];W[ag]C[Well done, it's a seki!RIGHT]) (;B[bg];W[ah]C[CHOICE]) (;B[ai];W[ah] (;B[bg];W[ag]C[CHOICE]) (;B[ag];W[bg]C[CHOICE])) (;B[ag];W[ai]C[CHOICE]))) (;B[bi];W[ah] (;B[ch];W[dh] (;B[bg];W[ag] (;B[ef];W[ci]C[Wrong! Black have no ko threats.CHOICE]) (;B[ci];W[ai]C[CHOICE]) (;B[ai];W[ci]C[CHOICE])) (;B[ag];W[bg] (;B[ef];W[ci]C[Wrong! Black have no ko threats.CHOICE]) (;B[ai];W[ci]C[CHOICE]) (;B[ci];W[ai]C[CHOICE])) (;B[ef];W[ag] (;B[ci]C[Well done, it's a seki!RIGHT]) (;B[bg]) (;B[ai])) (;B[ci];W[bg];B[ef];W[ai]C[CHOICE]) (;B[ai];W[ag] (;B[ef];W[ci]C[Wrong! Black have no ko threats.CHOICE]) (;B[ci];W[bg]C[CHOICE]) (;B[bg]))) (;B[ai];W[ag] (;B[ch];W[dh] (;B[ef];W[ci]C[Wrong! Black have no ko threats.CHOICE]) (;B[ci];W[bg]C[CHOICE]) (;B[bg])) (;B[ef];W[ch]C[CHOICE]) (;B[dh];W[ch]C[CHOICE]) (;B[bg];W[ch]C[CHOICE])) (;B[ef];W[ch]C[CHOICE]) (;B[bg];W[ch]C[CHOICE]) (;B[dh];W[ch]C[CHOICE]) (;B[ag];W[bg] (;B[ch];W[dh] (;B[ef];W[ci]C[Wrong! Black have no ko threats.CHOICE]) (;B[ai];W[ci]C[CHOICE]) (;B[ci];W[ai]C[CHOICE])) (;B[ef];W[ch]C[CHOICE]) (;B[dh];W[ch]C[CHOICE]) (;B[ai];W[ch]C[CHOICE]))) (;B[ai];W[ch]C[CHOICE]) (;B[ah];W[ch]C[CHOICE]) (;B[bg];W[ch]C[CHOICE]) (;B[ag];W[ch]C[CHOICE]) (;B[ef];W[ch]C[CHOICE]) (;B[dh];W[ch]C[CHOICE])) (;W[ch];B[ci];W[ah] (;B[bg];W[ag] (;B[bi];W[ai]C[CHOICE]) (;B[ai];W[bi]C[CHOICE])) (;B[ag];W[bg] (;B[bi];W[dh]C[CHOICE]) (;B[ai];W[bi]C[CHOICE]) (;B[ef];W[bi]C[CHOICE])) (;B[ef];W[bg] (;B[bi]C[Well done, it's a seki! RIGHT]) (;B[ai];W[bi]C[CHOICE]) (;B[dh];W[bi]C[CHOICE])) (;B[bi];W[bg] (;B[ef]C[Well done, it's a seki! RIGHT]) (;B[ai];W[dh]C[CHOICE]) (;B[dh];W[ai]C[CHOICE])))) (;B[bi];W[ci] (;B[ch];W[ah] (;B[ci];W[bh]C[CHOICE]) (;B[bh];W[dh] (;B[bg];W[ag] (;B[ef];W[ci]C[Wrong! Black have no ko threats.CHOICE]) (;B[ci];W[ai]C[CHOICE]) (;B[ai];W[ci]C[CHOICE])) (;B[ag];W[bg] (;B[ef];W[ci]C[Wrong! Black have no ko threats.CHOICE]) (;B[ai];W[ci]C[CHOICE]) (;B[ci];W[ai]C[CHOICE])) (;B[ef];W[ag] (;B[ci]C[Well done, it's a seki!RIGHT]) (;B[bg];W[ci]C[Wrong! Black have no ko threats.CHOICE]) (;B[ai];W[ci]C[Wrong! Black have no ko threats.CHOICE])) (;B[ci];W[bg];B[ef];W[ai]C[CHOICE]) (;B[ai];W[ag] (;B[ef];W[ci]C[Wrong! Black have no ko threats.CHOICE]) (;B[ci];W[bg]C[CHOICE]) (;B[bg];W[ci]C[CHOICE]))) (;B[bg];W[bh]C[CHOICE]) (;B[ag];W[bg]C[CHOICE]) (;B[ai];W[bh]C[CHOICE]) (;B[dh];W[bh]C[CHOICE]) (;B[ef];W[bh]C[CHOICE])) (;B[bh];W[ah] (;B[ch]) (;B[ai];W[ag] (;B[ch];W[dh]) (;B[ef];W[ch]C[CHOICE]) (;B[dh];W[ch]C[CHOICE]) (;B[bg];W[ch]C[CHOICE])) (;B[ef];W[ch]C[CHOICE]) (;B[bg];W[ch]C[CHOICE]) (;B[dh];W[ch]C[CHOICE]) (;B[ag];W[bg] (;B[ch];W[dh]) (;B[ef];W[ch]C[CHOICE]) (;B[dh];W[ch]C[CHOICE]) (;B[ai];W[ch]C[CHOICE]))) (;B[dh];W[ch]C[CHOICE]) (;B[ah];W[ch]C[CHOICE]) (;B[ai];W[ch]C[CHOICE]) (;B[bg];W[ch]C[CHOICE]) (;B[ag];W[ch]C[CHOICE]) (;B[ef];W[ch]C[CHOICE])) (;B[ch];W[bh]LB[bg:Eye]C[CHOICE]) (;B[ah];W[ci]LB[dh:eye]C[CHOICE]) (;B[ci];W[bh]LB[bg:eye]C[CHOICE]) (;B[dh];W[ch]C[CHOICE]) (;B[ef];W[ci]LB[dh:eye]C[CHOICE]) (;B[ai];W[bh]C[CHOICE]) (;B[bg];W[bh]C[CHOICE]) (;B[ag];W[ci]C[CHOICE])) (;B[bh];W[dh]C[CHOICE]) (;B[ef];W[dh]C[CHOICE]) (;B[dh];W[ch]C[CHOICE]) (;B[ci];W[bh]LB[bg:eye]C[CHOICE]) (;B[eh];W[dh]C[CHOICE]) (;B[ch];W[bh] (;B[di];W[eh]LB[bg:eye]C[CHOICE]) (;B[eh];W[dh]C[CHOICE]) (;B[dh];W[ci]C[CHOICE]) (;B[ci];W[bi]C[CHOICE]) (;B[bi];W[dh]C[CHOICE]) (;B[ai];W[ci]C[CHOICE]) (;B[ah];W[bi]C[CHOICE]) (;B[bg];W[ag]C[CHOICE]) (;B[ag];W[ah]C[CHOICE]) (;B[ef];W[ci]C[CHOICE])) (;B[bg];W[bh]C[CHOICE]) (;B[ag];W[ah]C[CHOICE]) (;B[bi];W[bh]C[CHOICE]) (;B[ah];W[ch]C[CHOICE]) (;B[ai];W[bh]C[CHOICE]))