Problem	14068
Created	2010-10-26
Source	tom.com
Rating

Difficulty	9 dan
Average Solve Time	96 secs
User Attempts	31 / 223
Solve Ratio Rating	2 dan
	rating history

I am happy to add additional variations. Please help and feel free to make suggestions.

(;AW[ap]AW[bq]AW[cq]AW[dq]AW[er]AW[fs]AB[bp]AB[cp]AB[dp]AB[eq]AB[fq]AB[fr]AB[bn]AB[cm]AB[hr]AB[hp]C[Black to kill white, unconditionally. Since this is possible, all variations that lead to ko are marked wrong.]AP[goproblems] (;B[dr];W[ds]C[Ko]) (;B[cs];W[bs]) (;B[aq] (;W[ar]C[CHOICE] (;B[cr];W[cs] (;B[bs];W[ds];B[br]C[Well done!RIGHT]) (;B[ds];W[bs];B[dr];W[br];B[es];W[er];B[dr];W[es])) (;B[bs];W[cr];B[ds];W[es])) (;W[br];B[cs];W[ds];B[cr]C[RIGHT]) (;W[ds];B[ar];W[br];B[ao]C[RIGHT])) (;B[cr];W[br] (;B[dr];W[ds]) (;B[bs];W[dr] (;B[cs];W[aq]) (;B[ds];W[es];B[cs];W[aq]))) (;B[br];W[cr]) (;B[ds];W[dr] (;B[br];W[cs]) (;B[bs];W[es];B[aq];W[ar] (;B[cs];W[cr]) (;B[cr];W[cs]))) (;B[ar];W[aq] (;B[cr];W[br];B[dr];W[ds]) (;B[br];W[cr])) (;B[bs];W[br] (;B[aq];W[ds]) (;B[cr];W[dr] (;B[cs];W[aq]) (;B[ds];W[es];B[cs];W[aq])) (;B[cs];W[ds] (;B[cr];W[aq]) (;B[aq];W[cr];B[gs];W[as])) (;B[ds];W[cs];B[cr];W[dr] (;B[aq];W[cs]) (;B[cs];W[aq])) (;B[dr];W[ds])))