Problem 16402 goproblems.com


Author	BartTM	Created	2012-08-22
Difficulty	1 kyu (history)	Source	Problem 3893 & 13730
AVG solve time	44 sec	Stars	4.33 (3 votes)
User attempts	303 / 984	Collections	N/A
Genre	life and death	Your attempts	N/A
Similar problems
Created	2012-08-22
Source	Problem 3893 & 13730
Stars	4.33 (3 votes)
Collections	N/A
Your attempts	N/A

(;AW[pa]AW[ob]AW[nb]AW[pc]AW[qc]AW[rc]AW[rd]AB[re]AB[qf]AB[qd]AB[pd]AB[oc]AB[mb]AB[ma]AB[na]MA[ma]AB[mc]AB[nc]C[White did ignore N19. So, now what? Play at N14 (Tenuki) if you think White can not be killed.FORCE]LB[mf:Tenuki]AP[goproblems] (;B[pb] (;W[qb] (;B[ra];W[rb] (;B[sd];W[oa]) (;B[oa];W[sd] (;B[sb]C[Dead by bent 4 in the corner.RIGHT]) (;B[pb];W[qa] (;B[sb];W[sa]C[Ko]) (;B[ob];W[sb]))) (;B[sb];W[oa]) (;B[sc];W[oa])) (;B[oa];W[ra] (;B[pb];W[ob]) (;B[sb];W[pb]) (;B[sd];W[sb])) (;B[sb];W[ra];B[oa];W[pb]) (;B[sd];W[ra] (;B[oa];W[sb]) (;B[sb];W[sc])) (;B[sc];W[ra])) (;W[ra] (;B[qb];W[rb] (;B[oa]C[White S19 may look a bit weird but R18 is the only correct answer to that. You can explore the Tenuki option to see other possible lines of defense for White.RIGHT]) (;B[sd];W[qa])) (;B[oa];W[qb] (;B[sb];W[ob]) (;B[ob];W[sb]) (;B[sd];W[sb]) (;B[qa];W[sb])) (;B[sd];W[qb] (;B[oa]) (;B[sb];W[sc])) (;B[sb];W[qb];B[oa]) (;B[rb];W[qb]) (;B[qa];W[qb]) (;B[sc];W[qb]) (;B[sa];W[qb]))) (;B[oa];W[ra] (;B[pb];W[qb] (;B[sb];W[ob]) (;B[ob];W[sb]) (;B[sd];W[sb]) (;B[qa];W[sb])) (;B[qb];W[pb]) (;B[sd];W[sb]) (;B[sb];W[qb] (;B[pb];W[ob]) (;B[sd];W[sc];B[pb];W[ob]) (;B[rb];W[sc];B[pb];W[ob]) (;B[sc];W[sd] (;B[se];W[pb]) (;B[pb];W[ob]))) (;B[rb];W[qb])) (;B[qa];W[ra] (;B[oa];W[qb] (;B[pb];W[ob]) (;B[sb];W[pb]) (;B[sd];W[sb])) (;B[pb];W[qb]) (;B[qb];W[rb]) (;B[rb];W[qb]) (;B[sd];W[qb] (;B[oa]) (;B[sb];W[sc])) (;B[sb];W[qb];B[oa])) (;B[qb];W[qa] (;B[oa];W[pb] (;B[rb];W[sb] (;B[ra];W[sd]) (;B[sd];W[ra])) (;B[sd];W[rb]) (;B[sb];W[rb]) (;B[sc];W[sd])) (;B[ra];W[rb]) (;B[rb];W[sb] (;B[ra];W[sd]) (;B[sd];W[ra]) (;B[oa];W[pb] (;B[ra];W[sd]) (;B[sd];W[ra]))) (;B[sd];W[rb]) (;B[sb];W[rb])) (;B[ra];W[rb] (;B[pb];W[qa] (;B[sd];W[sa] (;B[oa];W[sc]) (;B[sc];W[oa])) (;B[oa];W[sa]) (;B[sa];W[sb] (;B[sd];W[oa]) (;B[ra];W[sd]) (;B[oa];W[sd])) (;B[sb];W[sc];B[oa];W[sa]) (;B[sc];W[sd] (;B[oa];W[qb]) (;B[sb];W[qb]))) (;B[oa] (;W[pb];B[qa];W[sd]) (;W[qa] (;B[pb];W[sa]) (;B[sd];W[sa] (;B[pb];W[sc]) (;B[sc];W[pb])) (;B[qb];W[pb]) (;B[sb];W[sc]))) (;B[qa];W[qb] (;B[oa];W[sa]) (;B[sd];W[sa] (;B[sc];W[oa]) (;B[oa];W[sc])) (;B[sa];W[sb]) (;B[sb];W[sc])) (;B[qb];W[qa]) (;B[sd];W[qa] (;B[pb];W[sa] (;B[oa];W[sc]) (;B[sc];W[oa])) (;B[oa];W[sa] (;B[pb]) (;B[sc];W[pb])) (;B[sb];W[sc]) (;B[sc];W[sa])) (;B[sb];W[qa] (;B[pb];W[sc];B[oa];W[sa]) (;B[oa];W[sc]) (;B[sd];W[sc]) (;B[qb];W[pb])) (;B[sc];W[qa] (;B[pb];W[sd] (;B[oa];W[qb]) (;B[sb];W[qb])) (;B[oa];W[pb]) (;B[sd];W[sa]))) (;B[rb];W[ra] (;B[pb];W[qb]) (;B[oa];W[qb]) (;B[qb];W[sb]) (;B[sd];W[sb]) (;B[sb];W[qb] (;B[oa];W[sc];B[pb];W[ob]) (;B[sd];W[sc] (;B[oa];W[sa];B[pb];W[ob]) (;B[se];W[oa])) (;B[sc];W[sd])) (;B[sc];W[sd] (;B[sa];W[qa] (;B[oa];W[sb]) (;B[sb];W[qb])) (;B[qb];W[sb]) (;B[oa];W[sb] (;B[pb];W[qb]) (;B[qb];W[pb])) (;B[sb];W[qb]))) (;B[sd];W[ra] (;B[pb];W[qb]) (;B[oa];W[sb]) (;B[qb];W[rb]) (;B[sc];W[sb]) (;B[sb];W[sc] (;B[oa];W[qb];B[pb];W[ob]) (;B[rb];W[qb] (;B[oa];W[sa];B[pb];W[ob]) (;B[se];W[oa])) (;B[qb];W[rb])) (;B[rb];W[sb])) (;B[sc];W[sb] (;B[rb];W[sd] (;B[qb];W[ra]) (;B[ra];W[qb];B[oa];W[qa]) (;B[qa];W[qb]) (;B[oa];W[ra] (;B[pb];W[qb]) (;B[qb];W[pb])) (;B[pb];W[qb])) (;B[qb];W[pb] (;B[rb];W[sd]) (;B[sd];W[se] (;B[sd];W[ra]) (;B[ra];W[sd]))) (;B[oa];W[qb] (;B[ra];W[sd]) (;B[pb];W[ob])) (;B[pb];W[qb]) (;B[ra];W[sd] (;B[oa];W[qb]) (;B[pb];W[qb]) (;B[rb];W[qb];B[oa];W[qa]) (;B[qb];W[rb]) (;B[qa];W[rb])) (;B[qa];W[ra]) (;B[sd];W[ra])) (;B[sb];W[ra] (;B[pb];W[qb]) (;B[oa];W[qb] (;B[pb]) (;B[sd];W[sc];B[pb];W[ob]) (;B[rb];W[sc];B[pb];W[ob]) (;B[sc];W[sd] (;B[se];W[pb]) (;B[pb];W[ob]))) (;B[qb];W[rb]) (;B[sd];W[sc] (;B[oa];W[qb]) (;B[rb];W[qb]) (;B[qb];W[rb])) (;B[rb];W[qb] (;B[oa]) (;B[sd];W[sc] (;B[oa];W[sa];B[pb];W[ob]) (;B[se];W[oa])) (;B[sc];W[sd])) (;B[sc];W[sd])) (;B[mf]AW[ma]AW[na]AW[mb]AW[mc]AW[nc]AW[oc]AW[pd]AW[qd]AW[re]AW[qf]AW[mf]AB[pa]AB[ob]AB[nb]AB[pc]AB[qc]AB[rc]AB[rd];W[pb]C[Okay, so if we swap sides and White plays Q18 how do you live?] (;B[qb];W[ra] (;B[sb];W[sd] (;B[qa];W[oa]) (;B[oa];W[qa])) (;B[oa];W[qa]) (;B[qa];W[oa]) (;B[sd];W[sb] (;B[oa];W[qa] (;B[pb];W[rb]) (;B[rb];W[pb]) (;B[sc];W[pb])) (;B[rb];W[oa]C[Dead by bent 4 in the corner.])) (;B[rb];W[oa] (;B[sd];W[sb]) (;B[sa];W[sb] (;B[sd]C[Dead by bent 4 in the corner]) (;B[sc];W[sa]) (;B[qa];W[sa]) (;B[pb];W[sd])))) (;B[ra];W[qb] (;B[qa];W[oa]) (;B[rb];W[oa]) (;B[sb];W[oa]) (;B[sd];W[rb]) (;B[oa];W[qa] (;B[ob];W[oa]) (;B[rb];W[ob]) (;B[sd];W[rb]))) (;B[sb];W[qb] (;B[rb];W[oa]) (;B[ra];W[oa]) (;B[oa];W[qa]) (;B[qa];W[oa]) (;B[sd];W[rb] (;B[ra];W[oa]) (;B[oa];W[se]) (;B[qa];W[oa]))) (;B[sd];W[qb] (;B[rb];W[oa]) (;B[ra];W[rb]) (;B[oa];W[rb]) (;B[qa];W[rb])) (;B[rb];W[oa] (;B[qa];W[sd]) (;B[sd];W[qa])) (;B[qa];W[oa] (;B[rb];W[sd]) (;B[sd];W[qb]) (;B[sb];W[qb]) (;B[qb];W[sb])) (;B[oa];W[qa] (;B[qb];W[sb]) (;B[ra];W[sb]) (;B[sb];W[qb])) (;B[sc];W[qb])))