Problem	10518
Created	2007-10-19
Name	Sung7
Source	english Go-Book from the 50's
Rating

Difficulty	10.5 kyu
Average Solve Time	27 secs
User Attempts	2261 / 4219
Solve Ratio Rating	10 kyu
	rating history

(;AB[rq]AB[qq]AB[pq]AB[oq]AB[nq]AB[mq]AB[lq]AB[lr]AB[ms]AB[ns]AW[sr]AW[rr]AW[qr]AW[pr]AW[or]AW[nr]AW[mr]C[Kill the white Group]AP[goproblems] (;B[rs];W[os];B[qs];W[ls];B[ms]C[RIGHT];W[ns] (;B[ks] (;W[ms] (;B[jr]C[CHOICERIGHT]) (;B[kr]C[CHOICERIGHT])) (;W[kr]C[White lives if she has a god enough ko-threat CHOICE])) (;B[kr];W[ks];B[js]C[CHOICERIGHT])) (;B[qs];W[rs];B[os];W[ps]C[dfg CHOICE]) (;B[os];W[ps] (;B[rs];W[ls];B[ms];W[ns];B[ks];W[ms]C[CHOICE]) (;B[ls];W[rs]C[CHOICE])) (;B[ps] (;W[os];B[ls];W[qs]) (;W[qs];B[ls];W[os])))