Problem	12121
Created	2008-12-22
Source	Cho Chikun - Elementary Problems
Rating

Difficulty	25.6 kyu
Average Solve Time	19 secs
User Attempts	9101 / 12872
Solve Ratio Rating	20 kyu
	rating history

Black to kill

(;AB[ba]AW[da]AW[db]AW[cb]AW[bb]AW[bc]AW[bd]AW[ad]AB[be]AB[ce]AB[cc]AB[cd]AB[dc]AB[ec]AB[eb]AP[goproblems] (;B[aa];W[ab]C[CHOICE]) (;B[ca];W[aa]C[CHOICE]) (;B[ac];W[ab]C[CHOICE]) (;B[ab] (;W[ac];B[aa]C[RIGHT]) (;W[ca];B[aa]C[RIGHT])))