Problem	1133
Created	2001-11-01
Source
Rating

Difficulty	4 kyu
Average Solve Time	32 secs
User Attempts	1305 / 4967
Solve Ratio Rating	3 kyu
	rating history

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[13]KM[0.00]TM[] PW[White]PB[Black]AW[cb][dc][bd][cd][dd][ae]AB[db][eb][fc][be][ce][de][ee][bg]C[Black plays, White dies. (Be careful of a Ko.) ] (;B[ba]CR[ba] ;W[ca]CR[ca] ;B[bb]CR[bb] ;W[bc]CR[bc] (;B[da]CR[da]C[RIGHT B13 is the vital point. After White C13, Black B12 destroys White's eye shape. ]) (;B[ab]CR[ab] ;W[ac]CR[ac])) (;B[bb]CR[bb] ;W[ba]CR[ba] (;B[bc]CR[bc] ;W[ab]CR[ab] ;B[ac]CR[ac] ;W[ad]CR[ad] ;B[aa]CR[aa]C[White gets a ko.]) (;B[ac]CR[ac] ;W[bc]CR[bc])) (;B[ac]CR[ac] ;W[bb]CR[bb] (;B[bc]CR[bc] ;W[ab]CR[ab] (;B[ca]CR[ca] ;W[ba]CR[ba] ;B[af]CR[af] ;W[ad]CR[ad]) (;B[ba]CR[ba] ;W[ca]CR[ca])) (;B[ab]CR[ab] ;W[bc]CR[bc] (;B[ca]CR[ca] ;W[ba]CR[ba]) (;B[ba]CR[ba] ;W[ca]CR[ca] ;B[aa]CR[aa] ;W[ad]CR[ad]) (;B[af]CR[af] ;W[ad]CR[ad] (;B[ba]CR[ba] ;W[ca]CR[ca] ;B[da]CR[da] ;W[aa]CR[aa]) (;B[ca]CR[ca] ;W[ba]CR[ba]))) (;B[ba]CR[ba] ;W[ab]CR[ab] ;B[ca]CR[ca] ;W[bc]CR[bc] (;B[af]CR[af] ;W[ad]CR[ad]) (;B[aa]CR[aa] ;W[da]CR[da]))))