Problem	379
Created	2001-02-01
Source
Rating

Difficulty	24.1 kyu
Average Solve Time	11 secs
User Attempts	40806 / 54568
Solve Ratio Rating	20 kyu
	rating history

(;AB[bb][ba][bd][cc][cd][be]AW[ca][cb][bc][dc][dd][ce][ee][cf][bf][bh][db]C[White to kill] (;W[ae];B[ac]C[Black has 2 eyes]) (;W[ab];B[ac];W[ae];B[aa]LB[ad:a]C[NOT 'a' !];W[af];B[ad]C[Black has 2 eyes]) (;W[ac]LB[ab:a][ad:b]C[RIGHT Black cannot approach on either a' or 'b', since he would put himself in atari.]))