Problem 3743 goproblems.com


Author	chrise	Created	2004-01-14
Difficulty	10 kyu (history)	Source	N/A
AVG solve time	43 sec	Stars	1.97 (33 votes)
User attempts	3517 / 10520	Collections	Corner based
Genre	life and death ⓢ	Your attempts	N/A
Similar problems
Created	2004-01-14
Source	N/A
Stars	1.97 (33 votes)
Collections	Corner based
Your attempts	N/A

(;AB[la]AB[lb]AB[lc]AB[md]AW[mc]AW[mb]AW[ma]AB[nd]AB[od]AW[ob]AW[pb]AW[pa]AW[rb]AW[qc]AB[pd]AB[pc]AW[qd]AB[qe]AB[re]AB[rc]AB[nb]AW[nc]AB[na]TR[na]C[Black has played the marked stone and is confident in his board position to obtain what he is looking for. What can white do?]AP[goproblems] (;W[oa];B[sb] (;W[ra];B[qb] (;W[qa];B[rd]C[White is dead!]) (;W[rd];B[sd]C[White is dead!])) (;W[rd];B[sd]C[Ko. Black was looking for this after o19. Now the whole group may die.]) (;W[qb];B[ra];W[rd];B[sd]C[Ko. Black was looking for this after o19. Now the whole group may die.])) (;W[sb];B[oc] (;W[rd]C[White loses four stones but lives in the cornerRIGHT]) (;W[qa];B[rd]C[White is dead!]) (;W[ra];B[qb]C[White is dead!] (;W[rd]C[];B[sd]C[White is dead!]) (;W[qa]C[];B[rd]C[White is dead!])) (;W[qb]C[Almost. Although white will live in the corner s16 is a better move.])) (;W[oc];B[sb] (;W[rd];B[sd]C[Ko. Black was looking for this after o19. Now the whole group may die.]) (;W[qb];B[ra];W[rd];B[sd]C[Ko. Black was looking for this after o19. Now the whole group may die.]) (;W[ra];B[qb])) (;W[qb];B[sb] (;W[rd];B[sd]C[] (;W[ra];B[oc] (;W[sc]C[Ko. Black was looking for this after o19. Now the whole group may die.]) (;W[sa]C[White loses four stones but lives in the cornerRIGHT])) (;W[oc];B[ra]C[Ko. Black was looking for this after o19. Now the whole group may die.])) (;W[ra];B[oc];W[rd];B[sd]C[] (;W[sc]C[Ko. Black was looking for this after o19. Now the whole group may die.]) (;W[sa]C[White loses four stones but lives in the cornerRIGHT])) (;W[oc];B[ra];W[rd];B[sd]C[Ko. Black was looking for this after o19. Now the whole group may die.])) (;W[qa];B[rd] (;W[qb];B[sb]C[White is dead!]) (;W[sb];B[oc]C[White is dead!]) (;W[oc];B[sb]C[White is dead!])) (;W[ra];B[qb] (;W[qa];B[sb] (;W[oc];B[rd]C[White is dead!]) (;W[rd];B[sd]C[Ko. Black was looking for this after o19. Now the whole group may die.])) (;W[sb];B[oc] (;W[rd]C[];B[sd]C[White is dead!]) (;W[qa]C[];B[rd]C[White is dead!]))) (;W[rd];B[sb]C[] (;W[oc];B[sd]C[Ko. Black was looking for this after o19. Now the whole group may die.]) (;W[oa];B[sd]C[Ko. Black was looking for this after o19. Now the whole group may die.]) (;W[sc]C[White lives in the corner. RIGHT]) (;W[qb];B[sd]C[Ko. Black was looking for this after o19. Now the whole group may die.] (;W[ra];B[oc] (;W[sc]C[Ko. Black was looking for this after o19. Now the whole group may die.]) (;W[sa]C[White loses four stones but lives in the cornerRIGHT])) (;W[oc];B[ra]C[Ko. Black was looking for this after o19. Now the whole group may die.])) (;W[ra];B[sd]C[Ko. Black was looking for this after o19. Now the whole group may die.]) (;W[sa];B[ra] (;W[qb];B[sd]C[Ko. Black was looking for this after o19. Now the whole group may die.]) (;W[sc]C[White lives in the corner. RIGHT])) (;W[qa];B[sd]) (;W[sd]C[White lives in the corner. RIGHT]) (;W[se]C[White lives in the corner. RIGHT])) (;W[sc];B[rd] (;W[oa];B[qb] (;W[qa];B[qc] (;W[ra];B[sb]) (;W[sb];B[ra])) (;W[ra];B[sb])) (;W[qb];B[oc] (;W[sb];B[ra]) (;W[ra];B[sb])) (;W[sb];B[qb];W[qa];B[ra] (;W[oc];B[qc]) (;W[sa];B[qc]) (;W[qc];B[oc]))))