Problem	3686
Created	2004-01-04
Source	The comments by Warp on problem 3669 :-)
Rating

Difficulty	20.5 kyu
Average Solve Time	18 secs
User Attempts	18592 / 27482
Solve Ratio Rating	18 kyu
	rating history

Elementary corner problem.

(;AB[dc]AW[ca]AB[cb]AB[ea]AB[eb]AW[fa]AW[fb]AW[gc]AW[bd]AW[cd]AW[ec]AB[dd]AW[ed]AW[de]AB[cc]AB[bc]AW[be]AP[goproblems] (;B[ba];W[da] (;B[db];W[ab] (;B[ac]C[The corner is safeRIGHT]) (;B[ad]C[];W[ac]C[Black dies]) (;B[aa];W[ac]C[Black dies]) (;B[bb];W[ac]C[Black dies])) (;B[bb];W[db]C[Black dies]) (;B[ab];W[db]C[No need to lose those stones]) (;B[ac];W[db]C[No need to lose those stones, and you have to play at a18 to save the whole group]) (;B[aa];W[ab]C[Black dies])) (;B[db];W[ab] (;B[ac];W[ba] (;B[bb];W[ad];B[aa]C[Only ko. Why did you make it so difficult for yourself?]) (;B[da];W[ad]C[Black dies])) (;B[da];W[ac]C[Black dies]) (;B[ba];W[ac]C[Black dies]) (;B[bb];W[ac]C[Black dies])) (;B[da];W[db]C[Oh dear]) (;B[bb];W[db]C[Snapback. Oops!]) (;B[aa];W[db]C[Snapback. Oops!]) (;B[ac];W[db]C[Snapback. Oops!]) (;B[ab];W[db]C[Snapback. No need to lose those stones. White could even have played b19, but that's for another problem...]))