Problem 3439 goproblems.com


Author	santa c	Created	2003-11-28
Difficulty	7 dan (history)	Source	Problem 3424.
AVG solve time	76 sec	Stars	1.67 (6 votes)
User attempts	181 / 2207	Collections	Amateur Game, Corner based, Slight aji difference
Genre	life and death ⓢ	Your attempts	N/A
Similar problems
Created	2003-11-28
Source	Problem 3424.
Stars	1.67 (6 votes)
Collections	Amateur Game, Corner based, Slight aji difference
Your attempts	N/A

(;SZ[19]AW[dc]AW[fc]AW[gc]AW[ad]AW[bd]AW[cd]AW[ed]AW[de]AW[ee]AW[fe]AB[bb]AB[db]AB[bc]AB[cc]AB[be]AB[ce]AB[df]AB[ag]AB[bg]AB[cg]AB[dg]LB[bb:2]LB[db:A]LB[ed:1]C[Black thinks, that he can live, after white 1, this way. Breake this delusion.]AW[hb]AW[ib]AW[ia]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[0.00] (;W[ba]C[bC19 is suicidal - Black should play at A17, and therefore the applet, will always play there. bC19 is only left to show, why. (Thanks, tails)] (;B[ac] (;W[ca];B[aa] (;W[ab]C[CHOICE]MA[aa];B[cb] (;W[aa];B[da]C[Black's alive!]) (;W[eb];B[aa]MA[ab]C[Ko, but black takes first!]) (;W[da];B[eb] (;W[ea];B[fa]C[Black's alive!];W[fb];B[aa]C[Black's alive!]) (;W[fb];B[ea]C[Black's alive!]) (;W[fa];B[ea]C[Black's alive!]) (;W[aa]C[Black's alive!])) (;W[ea];B[eb] (;W[da];B[fa];W[fb];B[aa]C[Black's alive!]) (;W[fa];B[da] (;W[fb];B[aa]C[Black's alive!]) (;W[ec];B[aa]C[Black's alive!])) (;W[fb];B[aa]MA[ab]C[Ko, but black takes first.]))) (;W[eb];B[da] (;W[ab]MA[aa]C[Ko! Nice! (Thanks to DrStraw and tails!)RIGHT]) (;W[ea];B[cb]C[Black's alive!])) (;W[ea];B[da] (;W[ab]C[Ko! Nice! (Thanks to DrStraw and tails!)RIGHT]MA[aa]) (;W[eb];B[cb]C[Black's alive!])) (;W[da];B[eb]C[Black's alive!])) (;W[da];B[ea] (;W[ab];B[aa]C[Ko - But black takes first. By playing at C19 instead of D19 white'd take first.]MA[ab]) (;W[ca];B[cb]C[Black's alive!]) (;W[eb];B[ca]C[Black's alive!])) (;W[eb];B[ca]C[Black's alive!]) (;W[ea];B[ca]LB[aa:A]LB[da:B]C[Black's alive! (A and B are miaia to kill)]) (;W[aa];B[ca]C[Black's alive!])) (;B[ca] (;W[ab];B[eb] (;W[ac]LB[aa:A]LB[da:2]LB[ea:B]LB[cb:1]LB[fb:B]C[Nice! :) (A is now a must to secure eye no 1 and B is a must to get a 2nd eye -> Black's dead.)RIGHT]) (;W[fb];B[aa]MA[ba] (;W[ac];B[ea];W[ba]C[Ko - Could be better.]MA[aa]) (;W[ea];B[ac]C[Black's alive!])) (;W[ea];B[aa]MA[ba] (;W[fb];B[ac]C[Black's alive!]) (;W[ac];B[fa];W[fb]C[Nice! :)RIGHT]))) (;W[eb];B[ac]C[Black's alive!]) (;W[ac];B[ab]C[Black's alive!]))) (;W[ab];B[ac]C[] (;W[ba];B[aa]MA[ab]C[Ko.. But black takes first! (Thanks, Andre Engels!)]) (;W[ca];B[ba]C[Black's alive!]) (;W[aa];B[ba]C[Black's alive!]) (;W[eb];B[ca]C[Black's alive!]) (;W[da];B[ca]C[Black's alive!]LB[aa:A]LB[ea:B]) (;W[ea];B[ca]C[Black's alive!]LB[aa:A]LB[da:B])) (;W[ca];B[ba]LB[da:B]LB[ab:A]LB[eb:B]LB[ac:A]C[Black's alive! (A for 1 eye, B for the other)]) (;W[da];B[eb] (;W[ca];B[ba]LB[ea:B]LB[ab:A]LB[fb:B]LB[ac:A]C[Black's alive! (A for one eye, B for the other)]) (;W[fb];B[ea] (;W[ca];B[ba]LB[ab:A]LB[ac:A]C[Black's alive! (A gets the other eye)]) (;W[ac];B[ab] (;W[ca];B[ba]C[Black's alive!]) (;W[ba];B[ca]C[Black's alive!])) (;W[ba];B[ca] (;W[ab];B[aa];W[ac];B[ba]C[Black's alive!]) (;W[ac];B[ab]C[Black's alive!])) (;W[ab];B[ac] (;W[ba];B[cb]C[Black's alive!]) (;W[ca]LB[aa:A]LB[ba:A]C[Black's alive! (A for 2 eyes)]))) (;W[ac];B[ab] (;W[ca];B[ba]C[Black's alive!]) (;W[ba];B[ca] (;W[cb]MA[ca]C[A ko isn't a good enough solution, when sure kill's possible! (Thanks yodh!)]) (;W[fb];B[ea]C[Black's alive!]) (;W[fa];B[ea]C[Black's alive!]) (;W[ea];B[fa] (;W[fb];B[ea]C[Black's alive!]) (;W[ea];B[fb]C[Black's alive!]))) (;W[fb];B[ea]LB[ba:A]LB[ca:A]C[Black's alive! (A for 2 eyes)] (;W[ca];B[ba]C[Black's alive!]) (;W[ba];B[ca]C[Black's alive!]))) (;W[ba];B[ac] (;W[ab];B[aa]C[Ko, but black takes first.]MA[ab]) (;W[cb];B[ca]C[Ko, but black takes first.]MA[cb]) (;W[ca];B[ea]C[Black's alive!]) (;W[ea];B[fa] (;W[fb];B[ca]C[Black's alive!]) (;W[ca];B[cb]C[Black's alive!]) (;W[aa];B[ca]C[Black's alive!]) (;W[cb];B[ca]C[Black's alive!]) (;W[ab];B[aa]C[Ko, but black takes first.]MA[ab])) (;W[fb];B[ea] (;W[ca];B[cb]C[Black's alive!]) (;W[aa];B[ca]C[Black's alive!]) (;W[cb];B[ca]C[Black's alive!]) (;W[ab];B[aa]C[Ko, but black takes first!]MA[ab])) (;W[fa];B[ea] (;W[ab];B[aa]C[Ko, but black takes first.]MA[ab]) (;W[ca];B[cb]C[Black's alive!]) (;W[aa];B[ca]C[Black's alive!]) (;W[cb];B[ca]C[Black's alive!])) (;W[aa];B[ea]C[Black's alive!])) (;W[ab];B[ac] (;W[ba];B[aa]C[Ko, but black takes first.]MA[ab]) (;W[ca];B[ba]C[Black's alive!]) (;W[aa];B[ba]C[Black's alive!]) (;W[ea];B[ca] (;W[fa];B[aa]C[Black's alive!]) (;W[aa];B[fa]C[Black's alive!]) (;W[ba];B[aa]C[Black's alive!])) (;W[fb];B[ca]LB[aa:A]LB[ea:B]C[Black's alive!])) (;W[ea];B[fb] (;W[fa];B[ga];W[gb];B[ca]C[Black's alive!]) (;W[ba];B[fa]C[Black's alive!]))) (;W[eb];B[ca]LB[ab:A]LB[ac:A]C[Black's alive! (A for the second eye)]) (;W[aa];B[ca]LB[ab:A]LB[ac:A]C[Black's alive! (A for the second eye)]) (;W[ac];B[ab] (;W[ca];B[ba];W[da];B[eb]C[Black's alive!]) (;W[eb];B[ca]C[Black's alive!]) (;W[da];B[eb] (;W[ca];B[ba]C[Black's alive!]) (;W[ba];B[ca];W[cb]C[Ko, white takes first! Well done! :)RIGHT]MA[ca]) (;W[fa];B[ea]LB[ba:A]LB[ca:B]C[Black's alive!]) (;W[ea];B[fa] (;W[fb];B[ca]C[Black's alive!]) (;W[ca];B[ba];W[fb];B[cb]C[Black's alive!]) (;W[ba];B[ca]C[Black's alive!] (;W[fb];B[ea]C[Black's alive!]) (;W[ea];B[fb]C[Black's alive!]))) (;W[fb];B[ea]LB[ba:A]LB[ca:B]C[Black's alive!] (;W[ca];B[ba]C[Black's alive!]) (;W[ba];B[ca]C[Black's alive!]))) (;W[ea];B[da]LB[ba:A]LB[ca:B]C[Black's alive!]) (;W[ba];B[ca]C[Black's alive!])) (;W[ea];B[da] (;W[ac];B[ab]LB[ba:A]LB[ca:B]C[Black's alive!]) (;W[ab];B[ac] (;W[ba];B[aa]C[Ko. But black takes first.]MA[ab]) (;W[eb];B[ba]C[Black's alive!]) (;W[ca];B[ba]C[Black's alive!])) (;W[ba];B[ac] (;W[ab];B[aa]C[Ko. But black takes first.]MA[ab]) (;W[ca];B[aa];W[ab]C[Ko. And white takes first! Well done! :)RIGHT]MA[aa]) (;W[eb];B[aa];W[ab]C[Ko. And white takes first! Well done! :)RIGHT]MA[aa]) (;W[aa];B[ca]C[Black's alive!])) (;W[ca];B[ba]C[Black's alive!])))