Problem	10097
Created	2007-06-03
Source	Go++ version 5 at 5 Strongest vs LCZLAPINSKI 14k KGS
Rating

Difficulty	22.8 kyu
Average Solve Time	34 secs
User Attempts	2854 / 5512
Solve Ratio Rating	10 kyu
	rating history

Save the most stones that can be saved.

(;AB[ca]AB[da]AB[cb]AB[cc]AB[dd]AB[ed]AB[de]AB[ef]AB[ff]AB[gf]AB[ge]AB[eg]AB[dg]AB[cg]AB[bg]AB[dh]AB[bh]AB[ah]AB[ai]AW[aj]AW[bi]AW[ci]AW[ch]AW[di]AW[bk]AW[eh]AW[fh]AW[fg]AW[gg]AW[hg]AW[hf]AW[he]AW[hd]AW[gd]AW[fd]AW[fc]AW[ec]AW[dc]AW[db]AW[ea]AW[hc]AW[hb]AW[ha]AW[fe]AW[ee]AW[ce]AW[al]AW[cl]AW[bm]AW[cm]AP[goproblems] (;B[be]C[BB15 is 2nd best.];W[cd];B[bd]C[];W[df]C[];B[cf]C[This the 2nd best result. Black saves 11 points of territory. White also gained 5 points. Black lost a total of 11 points.];W[de]C[]) (;B[ag];W[cd];B[bd];W[be];B[bc];W[ab]C[WA18 creates a bulky five. Black is left with only one eye.]MA[ac]MA[ab]MA[aa]MA[ba]MA[bb]) (;B[af];W[cd] (;B[bd];W[df];B[be];W[cf];B[bf]C[];W[bc];B[bb]C[]) (;B[be];W[bd];B[bc];W[ad];B[cf]C[Good. You saved some of your stones. There is a better first move.];W[df];B[ae]C[This is bad because it loses the corner as well as the D15 stones.]MA[bc]MA[cc]MA[cb]MA[ca]MA[da])) (;B[ae];W[cd];B[bb];W[ad];B[bd];W[be] (;B[df];W[bc]) (;B[ac];W[df] (;B[ag]C[]) (;B[af]C[]) (;B[bf]C[You live but this is a costly mistake.];W[af];B[ag];W[cf] (;B[ad];W[af]) (;B[af];W[ad];B[ae];W[af];B[ad])) (;B[cf];W[af];B[ad]))) (;B[ad];W[cd];B[be];W[cf];B[bf];W[df] (;B[bd]C[]) (;B[bc]C[];W[bd]C[]) (;B[ac];W[bc] (;B[bb]C[];W[bd]C[]) (;B[ab];W[bb]) (;B[aa];W[bb];B[ab];W[bd]C[All black stones are dead because they only have one eye.]) (;B[ba];W[bd]C[All black stones can be killed.] (;B[ab];W[bb]C[All black stones are dead.]) (;B[bb];W[ab])) (;B[bd];W[bb];B[af]))) (;B[ac];W[cd];B[be];W[bd];B[cf];W[ad];B[ae];W[df];B[af];W[de]MA[ac]MA[cc]MA[cb]MA[ca]MA[da]C[Corner is lost.]MA[bc]MA[bb]MA[ab]MA[aa]MA[ba]) (;B[ab];W[cd];B[be];W[bd];B[cf];W[ad];B[bc];W[ba];B[ae];W[df];B[af];W[de]) (;B[aa];W[cd];B[bd];W[be];B[ac];W[df]) (;B[bf];W[cd];B[bd] (;W[be]) (;W[df] (;B[be]C[]) (;B[ae];W[be];B[bb];W[af];B[ag];W[cf] (;B[ad];W[af]) (;B[af];W[ad])))) (;B[bd];W[cd];B[be]C[];W[df]C[];B[cf]C[This the 2nd best result. Black saves 11 points of territory. White also gained 5 points. Black lost a total of 11 points.];W[de]C[]) (;B[bc];W[cd];B[be];W[cf] (;B[df];W[bf];B[af];W[ag]) (;B[bd];W[bf];B[af];W[df] (;B[ag];W[ae]) (;B[ae];W[ag])) (;B[bf]C[];W[df] (;B[bd]C[]) (;B[ad]C[];W[bd]C[]))) (;B[bb];W[cd];B[ae] (;W[cf] (;B[df];W[bf];B[af];W[ag]) (;B[bf];W[bd];B[ad]C[];W[df]C[])) (;W[af]C[CHOICE])) (;B[ba];W[cd];B[bd];W[bf];B[be];W[df];B[af]C[]) (;B[cf];W[cd] (;B[df];W[bf]C[Atari]) (;B[bd];W[be];B[ae];W[df];B[bb];W[af];B[ad];W[bf]MA[ai]MA[ah]MA[bh]MA[bg]MA[cg]MA[cf]MA[dg]MA[dh]MA[eg]MA[ef]MA[ff]MA[gf]MA[ge]C[The marked stones are dead.])) (;B[cd]C[This is best since it is the only line that saves all the stones. Black has 17 points.RIGHT]) (;B[df];W[cd];B[bd];W[be];B[bc];W[bf];B[af];W[ae];B[ab];W[ad];B[ba];W[ag]C[Ko for marked stones.]MA[ai]MA[ah]MA[bh]MA[bg]MA[cg]MA[dg]MA[dh]MA[eg]MA[df]MA[de]MA[dd]MA[ed]MA[ef]MA[ff]MA[gf]MA[ge]) (;B[eb];W[cd];B[be];W[bd];B[df];W[bf];B[af];W[ae]C[All the black stones can be killed if necessary.]) (;B[fa];W[cd]))