Problem	506
Created	2001-04-11
Source
Rating

Difficulty	3.8 dan
Average Solve Time	65 secs
User Attempts	382 / 2680
Solve Ratio Rating	2 dan
	rating history

(;GM[1]FF[3] RU[Japanese]SZ[19]HA[0]KM[5.5] PW[White] PB[Black] GN[White (W) vs. Black (B)] DT[1999-07-28] SY[Cgoban 1.9.2]TM[30:00(5x1:00)]; AW[ch][bi][cj][ck][dk][el][em][fn][co][fo][ap][bp][cp][dp][gp][cq][gq][er][fr][cs][ds] AB[bj][bk][cl][dl][dm][bn][dn][ao][bo][do][eo][ep][dq][eq][dr]PL[2] C[white to kill cleanly (no ko) ] (;W[bm];B[cn] (;W[bl];B[cr] (;W[br];B[ar] (;W[bs];B[bq] (;W[aq];B[bq] (;W[cp];B[bp];W[aq]C[RIGHT ]) (;W[aq];B[cp]) ) (;W[as];B[es]) (;W[es];B[aq]) ) (;W[bq];B[bs]C[ko ]) (;W[as]C[ko ]) (;W[aq];B[bq]) ) (;W[ar];B[bs] (;W[br];B[es]) (;W[es];B[bq]) ) (;W[bs];B[br];W[ar];B[aq] (;W[bq];B[aq];W[cp];B[bp]) (;W[as];B[es]) ) ) (;W[cr];B[am]) (;W[am];B[cr];W[br];B[ar];W[bs];B[bq];W[aq];B[bq];W[cp];B[bp] (;W[aq];B[bl]) (;W[bl];B[aq]) ) (;W[al];B[bl]) ) (;W[cn];B[bm] (;W[al];B[am] (;W[aj];B[bl]) (;W[cm];B[bl]) ) (;W[cm];B[am]) ) (;W[bl];B[bm];W[al];B[am]) (;W[al];B[bl]) (;W[aj];B[bl] (;W[am];B[cn];W[bm];B[cr];W[br];B[ar]) (;W[cn];B[am];W[cm];B[bm];W[ak];B[cr];W[br];B[ar]) (;W[ak];B[cn]) ) )