Problem	8706
Created	2006-06-12
Source	2760
Rating

Difficulty	19.9 kyu
Average Solve Time	27 secs
User Attempts	5913 / 9364
Solve Ratio Rating	15 kyu
	rating history

Is the black group alive? (Y=Yes, N=No)

(;AB[ao]AB[bo]AB[co]AB[cn]AB[cm]AB[cl]AB[ck]AB[bk]AB[ak]AW[aj]AW[bj]AW[cj]AW[dj]AW[dk]AW[dl]AW[dm]AW[dn]AW[do]AW[dp]AW[cp]AW[bp]AW[ap]C[FORCE]LB[ej:Y]LB[ek:N]AP[goproblems] (;B[ek]C[Then try to kill black.] (;W[am];B[bm] (;W[al];B[an]) (;W[an];B[al])) (;W[bm];B[am] (;W[bl];B[bn]) (;W[bn];B[bl])) (;W[an];B[bm] (;W[am];B[al]) (;W[al];B[am])) (;W[al];B[bm] (;W[am];B[an]) (;W[an];B[am])) (;W[bn];B[bm] (;W[am];B[an]) (;W[an];B[am]) (;W[al];B[am])) (;W[bl];B[bm] (;W[al];B[am]) (;W[am] (;B[al]C[CHOICE]) (;B[an]C[CHOICE])) (;W[an];B[am]) (;W[bn];B[am]))) (;B[ej]C[];W[am]C[Now prove it.];B[bm] (;W[al]C[CHOICE];B[an]C[RIGHT]) (;W[an]C[CHOICE];B[al]C[RIGHT])))