Problem 8609 goproblems.com


Author	chipuni	Created	2006-05-26
Difficulty	19 kyu (history)	Source	"Life and Death" by James Davies, Chapter 10
AVG solve time	48 sec	Stars	4.38 (26 votes)
User attempts	4203 / 10023	Collections	Famous Problems, Corner based, Lack of Liberties (Damezumari)
Genre	life and death ⓒ	Your attempts	N/A
Similar problems
Created	2006-05-26
Source	"Life and Death" by James Davies, Chapter 10
Stars	4.38 (26 votes)
Collections	Famous Problems, Corner based, Lack of Liberties (Damezumari)
Your attempts	N/A

(;AB[ab]AB[bb]AB[bc]AB[cc]AB[dd]AB[de]AB[cf]AB[be]AB[ae]AW[bf]AW[bg]AW[cg]AW[dg]AW[ef]AW[ee]AW[ed]AW[dc]AW[db]AW[cb]AW[ba]C[Kill black. This problem is a little subtle.]AP[goproblems] (;W[ce];B[cd] (;W[df];B[ad]C[Black has two eyes. He lives.]) (;W[ad];B[df]C[Black has two eyes. He lives.] (;W[af];B[bd]C[Black has two eyes. He lives.]) (;W[bd];B[ac]C[Black has two eyes. He lives.]) (;W[ac];B[bd]C[Black has two eyes. He lives.]) (;W[aa];B[ca]C[Black thanks you for the extra stones!]) (;W[ca];B[bd]C[Black has two eyes. He lives.])) (;W[ac];B[ad]C[Black thanks you for the donation.]) (;W[bd];B[ad]C[Black thanks you for the donation.]) (;W[aa];B[ca]C[Black thanks you for the donation.]) (;W[ca];B[ad]C[Black makes two eyes. He lives.]) (;W[af];B[ad]C[Black makes two eyes. He lives.])) (;W[ad] (;B[bd]C[CHOICE] (;W[ce]C[You found the answer! Black cannot make two eyes.RIGHT]) (;W[df];B[ce]C[Black made two eyes. He lives.]) (;W[cd];B[ce]C[Black thanks you for your sacrifice.]) (;W[af];B[ce]C[Black has two eyes. He lives.]) (;W[aa];B[ca]C[You're just being silly!]) (;W[ca];B[ce]C[Black has two eyes, and lives.])) (;B[df]C[CHOICE] (;W[cd];B[ce] (;W[bd]C[Black is left with a straight three. Even if he captures at A17, youcan kill him. Good job!RIGHT]) (;W[aa];B[bd]C[So close!]) (;W[ca];B[bd]C[So close!]) (;W[af];B[bd]C[So close!]) (;W[ac];B[bd]C[You're just being silly...])) (;W[bd];B[cd] (;W[af];B[ac]C[At this point, black has two eyes. He lives.] (;W[ad];B[bd]C[Black clearly has two eyes. He lives.]) (;W[bd];B[ad]C[Black clearly has two eyes. He lives.]) (;W[aa];B[ad]C[Black clearly has two eyes. He lives.]) (;W[ec];B[ad]C[Black clearly has two eyes. He lives.]) (;W[ca];B[ad]C[Black clearly has two eyes. He lives.])) (;W[ag];B[ac]C[Black has two eyes. He lives.]) (;W[aa];B[ca]C[You've found the secret message!]) (;W[ca];B[ac]C[Black has two eyes. He lives.])) (;W[ce];B[cd] (;W[af];B[bd]C[Black has two eyes. He lives.]) (;W[bd];B[ac]C[Black has two eyes. He lives.]) (;W[ac];B[bd]C[Black has two eyes. He lives.]) (;W[aa];B[ca]C[Black thanks you for the extra stones!]) (;W[ca];B[bd]C[Black has two eyes. He lives.])) (;W[ac];B[bd]C[Black has two eyes. He lives.]) (;W[af];B[bd]C[Black has two eyes. Good binocular vision.]) (;W[aa];B[ca]C[Black thanks you for your sacrifice.]) (;W[ca];B[cd]C[Black has two eyes.]))) (;W[bd];B[cd] (;W[df];B[ad]C[Black has two eyes, and lives.]) (;W[ad];B[df]C[] (;W[af];B[ac] (;W[ad];B[bd]C[Black clearly has two eyes. He lives.]) (;W[bd];B[ad]C[Black clearly has two eyes. He lives.]) (;W[aa];B[ad]C[Black clearly has two eyes. He lives.]) (;W[ec];B[ad]C[Black clearly has two eyes. He lives.]) (;W[ca];B[ad]C[Black clearly has two eyes. He lives.])) (;W[aa];B[ca]C[You don't need to sacrifice stones to solve this problem.]) (;W[ca];B[ac]C[Black has two eyes. He lives.]) (;W[ag];B[ac]C[Black has two eyes. He lives.]) (;W[ec];B[ac]C[Black has two eyes. He lives.])) (;W[ac];B[ad]C[Black thanks you for the two eyes.]) (;W[af];B[df]C[Black has two eyes, and lives.]) (;W[aa];B[ca]C[Thank you for the sacrifice!]) (;W[ca];B[df]C[Black lives with two eyes.])) (;W[cd];B[bd]C[You can't stop black from moving in C15 next move, and making a second eye.]) (;W[ac];B[ad]C[Black now has two eyes.]) (;W[df];B[ad] (;W[ce];B[cd]C[Black lives with two eyes. At least, you got one stone...]) (;W[cd];B[ce]C[Black lives with two eyes.]) (;W[bd];B[ce]C[Black lives with two eyes.]) (;W[af];B[ce]C[Black lives with two eyes.]) (;W[aa];B[ca]C[Black thanks you for your sacrifice.]) (;W[ca];B[ce]C[Black lives with two eyes.])) (;W[aa];B[ca]C[No, you don't need to sacrifice stones to win this problem!]) (;W[ca];B[ad] (;W[ce];B[cd]) (;W[df];B[ce]C[Black has two eyes. He lives.]) (;W[af];B[df]C[C15 and C16 remain as ko threats, nothing more. Black has two eyes.]) (;W[cd];B[ce]C[Black has two eyes. He lives.]) (;W[bd];B[df]C[C15 and C16 remain as ko threats, nothing more. Black has two eyes.]) (;W[aa];B[df]C[C15 and C16 remain as ko threats, nothing more. Black has two eyes.])) (;W[af];B[ad] (;W[df];B[ce]C[Black has two eyes. He lives.]) (;W[ce];B[cd]C[Black has two and a half eyes. That's more than enough to live.]) (;W[cd];B[ce]C[Black has two eyes. He lives.]) (;W[bd];B[cd]C[Black has two eyes. That's enough to live.]) (;W[aa];B[ca]C[Thank you for the sacrifice!])))