Problem	450
Created	2001-03-21
Source
Rating

Difficulty	9.4 kyu
Average Solve Time	31 secs
User Attempts	3672 / 10732
Solve Ratio Rating	5 kyu
	rating history

Black to kill

(; AW[do][eo][fo][dp][fp][dq][eq][cr][fr][ds][es] AB[cl][dm][gm][cn][en][fn][co][go][cp][gp][bq][cq][fq][gq][br][gr][bs] (;B[gs];W[fs] (;B[dr];W[er];B[cs]C[RIGHT ]) (;B[cs];W[dr]) (;B[er];W[dr]) ) (;B[er];W[fs]) (;B[dr];W[cs]) (;B[cs];W[dr] (;B[gs];W[fs]) (;B[fs];W[gs];B[hs];W[fs]) ) (;B[fs];W[gs] (;B[hs];W[cs] (;B[fs];W[er]) (;B[er];W[dr];B[fs]C[Ko is not enough ]) ) (;B[dr];W[cs];B[hs];W[er]) (;B[cs];W[dr];B[hs];W[fs]) (;B[er];W[dr]) ) )