Problem	14416
Created	2011-01-06
Source	Common Folk question
Rating

Difficulty	8 dan
Average Solve Time	41 secs
User Attempts	22 / 136
Solve Ratio Rating	1 dan
	rating history

If you think the white stones in the top left corner are dead unconditionally already click "U". If you think it depends on who is first click one of the "D"s. Prove it. If you think the result is a ko click "K". Prove it. If you think the group is alive click "L". Prove it.

(;AW[ba]AW[ab]AW[cc]AB[ag]AB[bg]AB[dg]AB[cg]AB[eg]AB[fg]AB[gg]AB[gf]AB[ge]AB[gd]AB[gc]AB[gb]AB[ga]LB[lj:L]LB[hj:K]LB[cb:D]LB[bc:D]LB[bd:D]LB[db:D]LB[dc:D]LB[cd:D]AW[ma]AW[mb]AW[mc]AW[md]AW[me]AW[mf]AW[mg]AW[ng]AW[og]AW[pg]AW[qg]AW[rg]AW[sg]AB[ra]AB[sb]AB[qc]LB[jj:U]AP[goproblems] (;B[cb];W[db] (;B[bc];W[bb];B[dc];W[cd];B[bd];W[be] (;B[ce];W[dd] (;B[ae];W[ec]) (;B[bf];W[de];B[ae];W[ec])) (;B[ae];W[ad])) (;B[dc];W[eb];B[bc];W[cd];B[bb];W[bd] (;B[ca];W[ac];B[aa];W[ad]) (;B[ac];W[ca];B[aa];W[da])) (;B[da];W[bc];B[eb];W[dc];B[ca];W[be])) (;B[bc];W[bd] (;B[cd];W[cb];B[ad];W[be];B[ae];W[ac];B[af];W[eb]) (;B[ad];W[cb];B[be];W[cd];B[ac];W[eb]) (;B[cb];W[dc] (;B[db];W[bb];B[ec];W[ed];B[fc];W[ac]) (;B[bb];W[db] (;B[ca];W[ac];B[aa];W[ad]) (;B[ac];W[ca];B[aa];W[da])))) (;B[hj];W[jj] (;B[cb];W[db];B[bc];W[bb] (;B[dc];W[cd] (;B[bd];W[be]) (;B[da];W[eb];B[ea];W[ca];B[fa];W[ed])) (;B[cd];W[dc];B[da];W[ea])) (;B[bc];W[bd];B[cd];W[be] (;B[cb];W[dc];B[bb];W[db];B[ca];W[ac];B[aa];W[ad]) (;B[dc];W[cb];B[ad];W[ae])) (;B[bd];W[bc];B[db];W[cb]) (;B[db];W[cb];B[bd];W[bc])) (;B[bd];W[bc];B[cb];W[db] (;B[dc];W[eb]) (;B[da];W[eb])) (;B[db];W[cb];B[bc];W[bd];B[cd];W[be]) (;B[dc];W[cb];B[bc];W[bd];B[cd];W[be];B[ad];W[ae]) (;B[cd];W[bc];B[cb];W[db];B[dc];W[eb];B[da];W[ea]) (;B[lj];W[qb] (;B[pb];W[rc] (;B[rb];W[pc];B[qd];W[rd] (;B[re];W[qe];B[pd];W[se];B[oc]C[RIGHT]) (;B[oc];W[pd];B[qe];W[re] (;B[od];W[pe];B[qa];W[oa]) (;B[oa];W[nb];B[ob];W[qa]) (;B[pe];W[od];B[oe];W[nd];B[oa];W[nb];B[ob];W[qa]) (;B[ob];W[pe]))) (;B[qd];W[rb];B[rd];W[sc];B[qa];W[sa];B[pa]C[RIGHT])) (;B[pc];W[rb];B[rc];W[qa];B[pb];W[sa];B[sc];W[ra] (;B[pa];W[ra];B[re];W[se] (;B[pe];W[rf] (;B[qe]C[RIGHT]) (;B[qd];W[qf];B[qe]TR[od]TR[sd]C[RIGHT])) (;B[qe];W[sd];B[rd];W[sf] (;B[pd]C[RIGHT]) (;B[pe]C[RIGHT]) (;B[oe];W[od];B[pd]C[RIGHT]) (;B[od];W[pe];B[pd]C[RIGHT]) (;B[pf];W[pd];B[od];W[oe];B[pe];W[oc])) (;B[rf];W[sf] (;B[pe];W[qf];B[qe];W[sd];B[rd];W[od];B[pd]C[RIGHT]) (;B[qe];W[sd];B[rd];W[pd];B[od];W[pe];B[oe];W[of];B[nb];W[na];B[oa];W[oc]))) (;B[re];W[se] (;B[rf];W[sf] (;B[pe];W[rd] (;B[qd];W[sd] (;B[od]C[RIGHT]) (;B[qf];W[pf];B[od];W[oe]) (;B[pf];W[od]TR[pd]TR[qf])) (;B[sd];W[qe];B[qd];W[qf];B[od];W[oe];B[ne];W[of];B[ob];W[nc];B[pa];W[ra];B[na];W[nb]) (;B[qe];W[sd])) (;B[qe];W[sd];B[rd];W[pd]) (;B[rd];W[pe]) (;B[sd];W[qe])) (;B[pe];W[rf] (;B[qe];W[od];B[pd];W[sd];B[rd]C[RIGHT]) (;B[sd];W[qe];B[qd];W[qf];B[od];W[oe]) (;B[qd];W[qf];B[qe]TR[od]TR[sd]C[RIGHT])) (;B[qe];W[sd];B[rd];W[sf] (;B[pd]C[RIGHT]) (;B[pe]C[RIGHT]) (;B[oe];W[od];B[pd]C[RIGHT]) (;B[od];W[pe];B[pd]C[RIGHT]) (;B[pf];W[pd];B[od];W[oe];B[pe];W[oc]))))) (;B[jj]MA[ba]MA[ab]TR[aa]TR[bb]MA[cc]LB[bd:A]LB[bc:B]LB[db:C]LB[cb:D] (;W[bc]) (;W[cb]) (;W[db]) (;W[bd]) (;W[be]) (;W[eb]) (;W[dd]) (;W[cd]) (;W[dc])))