Problem	493
Created	2001-04-03
Source
Rating

Difficulty	11.1 kyu
Average Solve Time	19 secs
User Attempts	2212 / 7575
Solve Ratio Rating	4 kyu
	rating history

(;GM[1]FF[4]CA[UTF-8] SZ[19]RU[Japanese]KM[0]TM[1800,0,30,5]PW[]PB[]AB[bb]AE[ab]AB[ac][bc][cc][cb]AW[db][da]AB[eb][dc]AW[ec][dd]AB[fb]AW[fc][gc][gb]AE[ed]AB[cd][bd]AW[ce][be][ae][ad]AE[ee]AW[de]PL[W] (;W[ab]CR[ab] ;B[aa]CR[aa] (;W[ca]CR[ca]C[RIGHT black can't approach on either side]) (;W[fa]CR[fa] ;B[ca]CR[ca]) (;W[ea]CR[ea] ;B[ca]CR[ca])) (;W[ba]CR[ba] ;B[aa]CR[aa] (;W[ab]CR[ab]C[ko]) (;W[ca]CR[ca] ;B[ea]CR[ea])) (;W[ca]CR[ca] ;B[ba]CR[ba]) (;W[fa]CR[fa] ;B[ca]CR[ca] ;W[ea]CR[ea] ;B[aa]CR[aa]) (;W[ea]CR[ea] ;B[ca]CR[ca] ;W[fa]CR[fa] ;B[aa]CR[aa]) (;W[aa]CR[aa] ;B[ca]CR[ca]))