Problem 13931 goproblems.com

Add / View flags +4


Author	DarkSycthe	Created	2010-08-28
Difficulty	9 kyu (history)	Source	Modified from a KGS game
AVG solve time	75 sec	Stars	3.63 (19 votes)
User attempts	749 / 2026	Collections	Corner based
Genre	life and death ⓒ	Your attempts	N/A
Similar problems
Created	2010-08-28
Source	Modified from a KGS game
Stars	3.63 (19 votes)
Collections	Corner based
Your attempts	N/A

(;AB[aq]AB[br]AB[eq]AB[dq]AB[fq]AB[fr]AB[fs]AW[bp]AW[cp]AW[dp]AW[ep]AW[gp]AW[fp]AW[gq]AW[gr]AW[gs]AW[dr]C[Black to live unconditionally with points]AB[cq]AW[cr]AW[bn]AP[goproblems] (;B[ds] (;W[cs] (;B[bs];W[es] (;B[bq];W[ap];B[er]C[RIGHT]) (;B[er];W[bq])) (;B[er];W[es];B[bq];W[bs] (;B[as];W[ar];B[ds]C[Alive in double ko. White has infinite ko threats now thoughRIGHT]) (;B[ds]C[NOTTHIS]) (;B[ar];W[ap]C[Ko.])) (;B[bq];W[bs];B[er];W[es];B[as]C[Alive in double ko. White has infinite ko threats now thoughRIGHT]) (;B[es];W[bq])) (;W[bq];B[cs]C[RIGHT]) (;W[bs] (;B[er]C[RIGHT]) (;B[bq];W[cs] (;B[es];W[ap] (;B[ar]C[Seki]) (;B[as];W[ar]C[Ko])) (;B[er];W[es] (;B[as]) (;B[ar];W[ap]C[Ko.])) (;B[as];W[es] (;B[er]) (;B[ar];W[ap]))))) (;B[cs];W[ds] (;B[bs];W[bq]) (;B[bq];W[bs] (;B[ar]C[Seki]) (;B[as];W[ar]C[Ko.]) (;B[er];W[ap] (;B[ar]C[Seki]) (;B[as];W[ar]C[Ko]))) (;B[er];W[bs] (;B[bq];W[ap] (;B[ar]C[Seki]) (;B[as];W[ar]C[Ko])) (;B[es];W[bq]) (;B[as];W[bq])) (;B[es];W[bs] (;B[er];W[bq]) (;B[bq];W[ap] (;B[ar]C[Seki]) (;B[as];W[ar]C[Ko])))) (;B[bq];W[bs] (;B[ds];W[cs] (;B[er];W[es];B[as]C[Alive in double ko. White has infinite ko threats now thoughRIGHT]) (;B[as];W[es];B[er]C[Alive in double ko. White has infinite ko threats now thoughRIGHT])) (;B[ar];W[ds]C[Seki]) (;B[er];W[cs] (;B[ds];W[es];B[as]C[Alive in double ko. White has infinite ko threats now thoughRIGHT]) (;B[as];W[ar] (;B[ds];W[es];B[as]C[Alive in double ko.RIGHT]) (;B[es];W[ap]C[Ko.]))) (;B[cs];W[ds] (;B[ar]C[Seki]) (;B[as];W[ar]C[Ko.]) (;B[er];W[ap] (;B[ar]C[Seki]) (;B[as];W[ar]C[Ko]))) (;B[as];W[ds]C[Ko. Black can make seki, but either result is unsatisfactory.]) (;B[es];W[cs] (;B[ar]C[Seki]) (;B[as];W[ap]C[Ko.]) (;B[er];W[ap] (;B[ar]C[Seki]) (;B[as];W[ar]C[Ko])) (;B[ds];W[ap] (;B[ar]C[Seki]) (;B[as];W[ar]C[Ko])))) (;B[bs];W[bq] (;B[ds];W[er]) (;B[ar]C[Dead in gote.])) (;B[as];W[bq]) (;B[ar];W[bq]) (;B[es];W[bs] (;B[bq];W[cs] (;B[ar]C[Seki]) (;B[as];W[ap]C[Ko.]) (;B[er];W[ap] (;B[ar]C[Seki]) (;B[as];W[ar]C[Ko])) (;B[ds])) (;B[cs];W[ds] (;B[er];W[bq]) (;B[bq];W[ap] (;B[ar]C[Seki]) (;B[as];W[ar]C[Ko])))) (;B[er];W[bq]))