Problem	580
Created	2001-05-09
Source
Rating

Difficulty	7 dan
Average Solve Time	48 secs
User Attempts	800 / 4479
Solve Ratio Rating	1 dan
	rating history

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] GN[White (W) vs. Black (B)]PW[White]PB[Black]DT[1999-07-28]SY[Cgoban 1.9.2] ;AW[lp][mp][lq][nq][oq][pq][rq][lr][or][qr][rr]AB[ko][lo][mo][jp][np][op][pp][qp][rp][jq][mq][qq][sq][jr][mr][pr][sr]C[black to kill ] (;B[ps] ;W[os] (;B[ls] ;W[ks] (;B[ms]C[RIGHT black wins the liberty race ]) (;B[kr] ;W[ms])) (;B[ms] ;W[ls]) (;B[ns] ;W[qs]) (;B[nr] ;W[qs]) (;B[kr] ;W[ms]) (;B[ks] ;W[ms])) (;B[ls] ;W[ks] (;B[ms] ;W[ns] (;B[ps] ;W[kr]C[living shape ]) (;B[kr] ;W[nr] (;B[ps] ;W[os]) (;B[ls] ;W[ps]))) (;B[ps] ;W[ms])) (;B[ms] ;W[ls] (;B[ps] ;W[os]CR[os]) (;B[os] ;W[ps])) (;B[nr] ;W[ps]) (;B[rs] ;W[ps]) (;B[qs] ;W[ps]) (;B[ns] ;W[ps] (;B[ls] ;W[nr]) (;B[os] ;W[ls])) (;B[kr] ;W[ms]))