Problem 3427 goproblems.com


Author	kochi	Created	2003-11-27
Difficulty	4 kyu (history)	Source	poketto tesuji
AVG solve time	33 sec	Stars	4.23 (13 votes)
User attempts	1668 / 5523	Collections	Corner based, Irregular Tesuji
Genre	tesuji ⓒ	Your attempts	N/A
Similar problems
Created	2003-11-27
Source	poketto tesuji
Stars	4.23 (13 votes)
Collections	Corner based, Irregular Tesuji
Your attempts	N/A

(;AB[cb]AW[cc]AW[bc]AW[bb]AW[be]AW[bf]AW[cf]AB[bd]AB[cd]AB[ce]AB[dd]AB[dc]AB[fd]AB[gd]AW[ef]AW[ch]AW[ee]AB[hd]AW[ge]C[B to kill W's corner.]AP[goproblems] (;B[ab] (;W[ad]C[CHOICE] (;B[ba]C[RIGHT]) (;B[db];W[ac]) (;B[ca];W[ac])) (;W[db]C[CHOICE] (;B[ac];W[ca] (;B[eb]C[right.RIGHT]) (;B[ba];W[aa]C[ko isn't good enough] (;B[ad];W[eb];B[ba]C[]) (;B[eb];W[ad])) (;B[fb]C[RIGHT]) (;B[ec];W[eb]C[W can get a ko now.])) (;B[eb];W[ad];B[ba];W[ca];B[ea];W[ac];B[da];W[aa]) (;B[ba];W[ca];B[ac];W[aa];B[ad];W[eb]C[ko isn't good enough.];B[ba]C[ko isn't good enough.]) (;B[ca];W[ba] (;B[ac]C[RIGHT];W[da];B[eb];W[fb];B[ec];W[ea]) (;B[eb];W[ad] (;B[da];W[ac]) (;B[ac];W[aa] (;B[da];W[ac]) (;B[ac];W[da];B[ae]C[RIGHT])) (;B[ea];W[ac]) (;B[ae];W[af] (;B[ac];W[da] (;B[ae]C[ko not good enough.]) (;B[ea];W[aa])) (;B[da];W[ac]) (;B[ea];W[ac])))) (;B[ad];W[ca];B[ac];W[eb];B[ba]C[ko not good enough.];W[aa]))) (;B[ac];W[ab] (;B[ad];W[db] (;B[ca];W[da] (;B[ba];W[aa] (;B[ca];W[fb]C[alive] (;B[eb];W[ec] (;B[ea];W[fa];B[ed];W[fc]) (;B[ed];W[fc];B[fa];W[ea];B[gb];W[ga]) (;B[fc];W[ed] (;B[fa];W[ea]) (;B[gb];W[ea]))) (;B[ec];W[eb] (;B[fa];W[gb]) (;B[gb];W[fa])) (;B[fc];W[eb] (;B[fa];W[gb]) (;B[gb];W[fa])) (;B[fa] (;W[eb]) (;W[gb];B[eb];W[ec] (;B[fc];W[ea]) (;B[ea];W[ga];B[ea];W[fc]))) (;B[gb];W[ec] (;B[ed];W[fa] (;B[fc];W[eb]) (;B[eb];W[fc])) (;B[fc];W[ed]))) (;B[eb];W[ca])) (;B[eb];W[ba]) (;B[aa];W[ba])) (;B[eb];W[ca]C[alive];B[ea];W[da]) (;B[ba];W[ca]C[alive] (;B[eb];W[da];B[ea];W[aa]C[alive]) (;B[da];W[ea];B[eb];W[da];B[fa];W[aa];B[fc]))) (;B[da];W[ad]) (;B[db];W[ad])) (;B[db];W[ad];B[ac];W[ae]) (;B[ea];W[ad]) (;B[da];W[ad];B[ac];W[ae];B[ba];W[ab]) (;B[ba];W[db] (;B[ab];W[ca] (;B[ac];W[aa]C[ko isn't good enough, you could have killed cleanly.];B[ad];W[eb] (;B[ba]C[ko isn't good enough, you could have killed cleanly.]) (;B[fb];W[ea] (;B[ba]C[ko isn't good enough, you could have killed cleanly.]) (;B[ec];W[ba]) (;B[fc];W[ba])) (;B[ec];W[ba])) (;B[eb];W[ad];B[ea];W[ae];B[da];W[aa];B[cb];W[ac]) (;B[da];W[ea] (;B[ac];W[aa];B[ad];W[ec];B[ba];W[cb] (;B[fc];W[ed]) (;B[ed];W[fc] (;B[gc];W[fb] (;B[gb]) (;B[ga];W[fa])) (;B[gb];W[fb];B[ga];W[fa]) (;B[fb];W[gb] (;B[ga];W[fa] (;B[gc];W[eb];B[ha];W[hb]) (;B[hb];W[ha];B[gc];W[eb]) (;B[ha];W[gc])) (;B[gc];W[eb];B[ga];W[hb];B[ha];W[ia])) (;B[fa];W[ga] (;B[gc];W[fb]) (;B[gb];W[fb]))) (;B[fb];W[fc] (;B[ed];W[gb] (;B[gc];W[eb] (;B[ga];W[hb];B[ha];W[ia]) (;B[hb];W[ga])) (;B[ga];W[fa] (;B[gc];W[eb] (;B[ha];W[hb]) (;B[hb];W[ha])) (;B[hb];W[gc]) (;B[ha];W[gc])) (;B[fa];W[ga]) (;B[hb];W[fa])) (;B[gc];W[eb] (;B[gb];W[ed]) (;B[ga];W[ed]) (;B[ed];W[gb] (;B[hb];W[ga]) (;B[ga];W[hb];B[ha];W[ia]) (;B[ib];W[ga])) (;B[hb];W[ed])))) (;B[ed];W[ad]) (;B[ec];W[ad]) (;B[fc];W[ad]))) (;B[ca];W[da] (;B[eb];W[aa] (;B[ca];W[ad]) (;B[ac];W[ca])) (;B[ac];W[aa] (;B[ca];W[ab];B[ad];W[fb] (;B[eb];W[ec] (;B[ed];W[fc];B[fa];W[gb]) (;B[fc];W[ed] (;B[fa];W[ea]) (;B[gb];W[ea])) (;B[ea];W[fa];B[ed];W[fc]) (;B[fa];W[ed])) (;B[ec];W[eb] (;B[fa];W[gb]) (;B[gb];W[fa])) (;B[fc];W[eb] (;B[fa];W[gb]) (;B[gb];W[fa])) (;B[gb];W[eb] (;B[fa];W[ed] (;B[ec];W[fc];B[gc];W[de]) (;B[fc];W[ec])) (;B[ed];W[fa]) (;B[fc];W[fa]) (;B[ec];W[fa])) (;B[ea];W[eb];B[gb];W[fa]) (;B[fa];W[ec];B[ed];W[gb])) (;B[eb];W[ca]) (;B[ad];W[ab] (;B[eb];W[ca]) (;B[ca];W[fb] (;B[eb];W[ec] (;B[ea];W[fa]) (;B[ed];W[fc];B[fa];W[ea];B[gb];W[ga]) (;B[fc];W[ed] (;B[fa];W[ea]) (;B[gb];W[ea]))) (;B[ec];W[eb]) (;B[fc];W[eb]) (;B[fa] (;W[eb]) (;W[gb];B[eb];W[ec] (;B[fc];W[ea]) (;B[ea];W[ga];B[ea];W[fc]))) (;B[gb];W[ec] (;B[ed];W[fa] (;B[fc];W[eb]) (;B[eb];W[fc])) (;B[fc];W[ed])))))) (;B[da] (;W[ad];B[ab];W[ca]) (;W[ca] (;B[eb];W[ea]) (;B[ab];W[ac];B[cb];W[aa]))) (;B[ac];W[ca];B[ab]C[];W[aa]C[ko isn't good enough.];B[ad];W[eb];B[ba]C[ko isn't good enough.]) (;B[eb];W[ad] (;B[ab];W[ca];B[ea];W[ae];B[da];W[aa];B[cb];W[ac]) (;B[ac];W[ab];B[da]) (;B[da];W[ae])) (;B[ad];W[ca] (;B[ab];W[aa] (;B[eb];W[ac]) (;B[ac];W[eb];B[ba]C[ko isn't good enough.])) (;B[ac];W[ab];B[eb];W[da];B[ea];W[aa]) (;B[eb];W[aa] (;B[ea];W[da]) (;B[ac];W[ab];B[ea];W[da])))) (;B[ca];W[ad] (;B[ac];W[ab];B[ba];W[db];B[eb]) (;B[ae];W[af];B[ba];W[ae])) (;B[ed];W[ad]) (;B[ad];W[db] (;B[eb];W[ca]C[alive]) (;B[ca] (;W[da] (;B[ba];W[aa] (;B[ca];W[ac]) (;B[eb];W[ac]) (;B[ac];W[ab];B[ca];W[fb] (;B[eb];W[ec] (;B[ea];W[fa]) (;B[ed];W[fc];B[fa];W[ea];B[gb];W[ga]) (;B[fc];W[ed] (;B[fa];W[ea]) (;B[gb];W[ea]))) (;B[ec];W[eb]) (;B[fc];W[eb]) (;B[fa] (;W[eb]) (;W[gb];B[eb];W[ec] (;B[fc];W[ea]) (;B[ea];W[ga];B[ea];W[fc]))) (;B[gb];W[ec] (;B[ed];W[fa] (;B[fc];W[eb]) (;B[eb];W[fc])) (;B[fc];W[ed])))) (;B[ac];W[ba] (;B[eb];W[ab]) (;B[ab];W[fb] (;B[ec];W[eb];B[fa];W[gb]) (;B[eb];W[ec] (;B[ed];W[fc] (;B[fa];W[ea] (;B[gb];W[ga]) (;B[ga];W[hb])) (;B[gb];W[fa])) (;B[fc];W[ed]) (;B[fa];W[ed])) (;B[fc];W[eb] (;B[fa];W[gb]) (;B[gb];W[fa])) (;B[fa];W[ec];B[ed];W[gb]))) (;B[ab];W[ba] (;B[eb];W[ac]) (;B[ac];W[fb] (;B[fc];W[eb] (;B[fa];W[gb]) (;B[gb];W[fa])) (;B[ec];W[eb];B[fa];W[gb]) (;B[eb];W[ec] (;B[ed];W[fc] (;B[fa];W[gb];B[hb];W[ga]) (;B[gb];W[fa])) (;B[fc];W[ed])) (;B[gc];W[eb])))) (;W[ba];B[ab];W[da] (;B[ac];W[fb] (;B[gb];W[eb] (;B[fa];W[ed] (;B[fc];W[ec]) (;B[ec];W[fc] (;B[gc] (;W[de];B[ga];W[ae]) (;W[ae];B[ga];W[de])) (;B[ga] (;W[de];B[ea];W[ae]) (;W[ae];B[ea];W[de])))) (;B[ed];W[fa]) (;B[fc];W[fa]) (;B[ec];W[fa])) (;B[fc];W[eb] (;B[fa];W[gb]) (;B[gb];W[fa])) (;B[eb];W[ec] (;B[ed];W[fc] (;B[fa];W[gb];B[hb];W[ga]) (;B[gb];W[fa])) (;B[fc];W[ed])) (;B[ec];W[eb];B[fa];W[gb]) (;B[ed];W[eb])) (;B[eb];W[ac]))) (;B[da];W[ca] (;B[eb];W[ea];B[fa];W[da]) (;B[ea];W[eb];B[fa];W[fb];B[ga];W[gb];B[ha];W[ed];B[ec];W[fc])) (;B[ba];W[eb];B[ab];W[ca];B[ac];W[aa]C[ko]) (;B[ab];W[ca] (;B[ba];W[aa];B[ac];W[eb];B[ba]C[ko isn't good enough.]) (;B[ac];W[eb] (;B[ba];W[aa]) (;B[aa];W[ba])) (;B[eb];W[ac];B[ea];W[da]))))