Problem	12850
Created	2009-06-29
Source
Rating

Difficulty	16.9 kyu
Average Solve Time	30 secs
User Attempts	2996 / 7375
Solve Ratio Rating	7 kyu
	rating history

(;AB[cc]AB[bd]AB[ad]AB[bb]AB[ba]AB[cb]AW[ae]AW[be]AW[cd]AW[dc]AW[dd]C[Kill black.]AW[fb]AP[goproblems] (;W[ab] (;B[aa]C[E18 also works for black--see navigation.] (;W[ac];B[bc] (;W[ca];B[db];W[da];B[eb];W[ea];B[fa]) (;W[da];B[db] (;W[eb]C[RIGHT]) (;W[ea];B[eb]C[RIGHT])) (;W[eb];B[db] (;W[ea];B[da]) (;W[da]C[RIGHT])) (;W[ea];B[db] (;W[da];B[eb]C[RIGHT]) (;W[eb];B[da])) (;W[db]C[RIGHT])) (;W[bc];B[ac])) (;B[eb] (;W[db];B[da] (;W[ec]C[RIGHT]) (;W[fc]C[RIGHT]) (;W[ea]C[This sacrifice is unnecessary];B[fa]C[This sacrifice was unnecessary])) (;W[ec];B[db]) (;W[ea];B[da] (;W[fa];B[db]) (;W[db];B[fa]C[This sacrifice was unnecessary])) (;W[da];B[db];W[ea];B[ec]) (;W[ca];B[db]) (;W[fa];B[db]) (;W[fc];B[db]) (;W[bc] (;B[db]C[RIGHT]) (;B[ac];W[bc]C[RIGHT])))) (;W[aa];B[ab]) (;W[bc];B[ac]) (;W[ac];B[bc] (;W[ab];B[db] (;W[da];B[eb];W[ea];B[ec]) (;W[eb];B[da]) (;W[ca];B[da]) (;W[ea];B[da])) (;W[aa];B[ab])) (;W[db]C[CHOICE];B[ac]) (;W[ca]C[CHOICE];B[db]) (;W[da]C[CHOICE];B[ac]) (;W[eb];B[ac]) (;W[ea];B[ac]))