Problem 6342 goproblems.com

Add / View flags


Author	sohvan	Created	2005-04-16
Difficulty	9 dan (history)	Source	Yoon Hyun-suk vs Lee Changho 1992-04-20
AVG solve time	81 sec	Stars	3.25 (4 votes)
User attempts	76 / 1392	Collections	Instruction Required, Pro Game
Genre	life and death	Your attempts	N/A
Similar problems
Created	2005-04-16
Source	Yoon Hyun-suk vs Lee Changho 1992-04-20
Stars	3.25 (4 votes)
Collections	Instruction Required, Pro Game
Your attempts	N/A

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[0.50] PW[White]PB[Black]AW[pl][dm][jm][mm][pm][dn][en][gn][hn][in][mn][co][do][eo][fo][ho][io][lo][mo][oo][bp][dp][fp][ip][jp][dq][eq][mq][nq][cr][er][fr][gr][lr][mr]AB[ci][qk][dl][ql][cm][em][fm][gm][qm][bn][cn][fn][ln][pn][bo][go][jo][ko][po][cp][gp][kp][lp][pp][cq][fq][gq][hq][iq][jq][lq][br][dr][hr][kr][pr][bs][ds]PL[B] (;B[cs]CR[cs] ;W[bq]CR[bq] (;B[cr]CR[cr] ;W[es]CR[es] (;B[ap]CR[ap] ;W[gs]CR[gs]C[White lives]) (;B[gs]CR[gs] ;W[ar]CR[ar])) (;B[ar]CR[ar] ;W[cr]CR[cr] (;B[cq]CR[cq] ;W[aq]CR[aq] (;B[ao]CR[ao] ;W[es]CR[es] (;B[cr]CR[cr] ;W[cp]CR[cp]) (;B[hs]CR[hs] ;W[gs]CR[gs]) (;B[gs]CR[gs] ;W[cp]CR[cp] (;B[hs]CR[hs] ;W[cr]CR[cr]C[RIGHT Notes that this is a three step ko for black. Black stands to lose a lot in the corner, and can't really expect to win this ko.]) (;B[ap]CR[ap] ;W[cr]CR[cr]C[RIGHT Notes that this is a three step ko for black. Black stands to lose a lot in the corner, and can't really expect to win this ko.])) (;B[ap]CR[ap] ;W[gs]CR[gs]C[White lives])) (;B[cr]CR[cr] ;W[cp]CR[cp]) (;B[es]CR[es] ;W[ao]CR[ao] (;B[an]CR[an] ;W[cp]CR[cp] ;B[ap]CR[ap] ;W[cr]CR[cr]C[White lives in double ko.]) (;B[fs]CR[fs] ;W[gs]CR[gs] (;B[hs]CR[hs] ;W[cp]CR[cp] ;B[an]CR[an] ;W[cr]CR[cr]C[White lives in double ko]) (;B[an]CR[an] ;W[cp]CR[cp] (;B[ap]CR[ap] ;W[cr]CR[cr]C[White lives in double ko.]) (;B[hs]CR[hs] ;W[cr]CR[cr]C[White lives in double ko.]))) (;B[gs]CR[gs] ;W[fs]CR[fs] ;B[hs]CR[hs] ;W[cp]CR[cp] ;B[an]CR[an] ;W[cr]CR[cr]C[White lives in double ko.])) (;B[gs]CR[gs] ;W[ao]CR[ao] ;B[an]CR[an] ;W[cp]CR[cp] (;B[ap]CR[ap] ;W[cr]CR[cr]C[White lives in double ko]) (;B[es]CR[es] ;W[fs]CR[fs] ;B[hs]CR[hs] ;W[cr]CR[cr]C[White lives in double ko.]) (;B[fs]CR[fs] ;W[es]CR[es] ;B[hs]CR[hs] ;W[cr]CR[cr]C[White lives in double ko.]))) (;B[ap]CR[ap] ;W[cq]CR[cq]) (;B[aq]CR[aq] ;W[cq]CR[cq])) (;B[aq]CR[aq] ;W[cr]CR[cr] (;B[cq]CR[cq] ;W[ar]CR[ar]) (;B[ap]CR[ap] ;W[cq]CR[cq]) (;B[ar]CR[ar] ;W[cq]CR[cq])) (;B[gs]CR[gs] ;W[cr]CR[cr] ;B[cq]CR[cq] ;W[ar]CR[ar]) (;B[es]CR[es] ;W[cr]CR[cr] ;B[cq]CR[cq] ;W[ar]CR[ar])) (;B[bq]CR[bq] ;W[es]CR[es] ;B[cs]CR[cs] ;W[gs]CR[gs]C[White lives]) (;B[gs]CR[gs] ;W[bq]CR[bq] (;B[ap]CR[ap] ;W[cq]CR[cq]) (;B[aq]CR[aq] ;W[cq]CR[cq]) (;B[ar]CR[ar] ;W[cq]CR[cq]) (;B[cq]CR[cq] ;W[ar]CR[ar])))