Problem	472
Created	2001-03-25
Source
Rating

Difficulty	18.8 kyu
Average Solve Time	33 secs
User Attempts	8902 / 21287
Solve Ratio Rating	7 kyu
	rating history

(;GM[1]FF[4]CA[UTF-8] SZ[19]RU[Japanese]KM[0]TM[1800,0,30,5]PW[]PB[]AW[ra][rb][qb][pb]AB[sb][rc][qc][pc][ob][oa][pa][oc]AW[sd][rd][qd][pd][od][nc][nb]AE[ma]AW[lb]AE[nd]C[can black live?] (;B[qa]CR[qa] ;W[sc]CR[sc] ;B[sa]CR[sa] ;W[rb]CR[rb] (;B[qb]CR[qb] ;W[ra]CR[ra] ;B[sb]CR[sb]C[RIGHT]) (;B[ra]CR[ra] ;W[qb]CR[qb])) (;B[sc]CR[sc] ;W[qa]CR[qa] ;B[sa]CR[sa] ;W[qb]CR[qb]) (;B[sa]CR[sa] ;W[sc]CR[sc] ;B[sb]CR[sb] ;W[sa]CR[sa]))